DEPENDENCE OF GEOMETRICAL CONFIGURATION ON MECHANICAL BEHAVIOUR OF GFRP COMPOSITE SANDWICHES
|
|
- Annis Bell
- 5 years ago
- Views:
Transcription
1 DEPENDENCE OF GEOMETRICAL CONFIGURATION ON MECHANICAL BEHAVIOUR OF GFRP COMPOSITE SANDWICHES Antonino Valenza 1, Vincenzo Fiore 1 and Luigi Calabrese 2 1 Dept. o Ingegneria Chimica dei Processi e dei Materiali, University o Palermo, 9128 Palermo, Italy 2 Dept. o Chimica Industriale e Ingegneria dei Materiali, University o Messina, Messina, Italy ABSTRACT Aim o this research work is to ind the dependence o geometrical coniguration on ailure mechanism o composite sandwiches subjected to three point bending test. All tested structures have been realized at room temperature, with a single lamination, by vacuum bagging technique. These sandwiches are made up o two skin o E-glass/epoxy composite and closedcell PVC oam cores with a density o 6 Kg/m 3. Experimental tests have been carried out at varying skin thickness (t) and span length between support (l) with the purpose to show the dependence o mechanical behaviour on these geometric parameters. From experimental results a ailure map in the plane t - l has been created identiying three regions o typical ailure modes o the sandwiches. 1. INTRODUCTION When sandwich composites are subjected to three point bending, several ailure mechanisms may occur: a ailure mechanism will be shown when its breaking load results smaller in comparison o those ones o competitive mechanisms. In literature ive main ailure mechanisms have been identiied: skin compressive/tensile ailure, core shear ailure, skin wrinkling, indentation and delamination, i.e skin-core debonding [1]. Consider a sandwich beam (Figure 1) with skins o equal thickness subjected to a bending moment M and shear orce V. Figure 1: Experimental Schematic conigurations o the oam core composite sandwich beam: (a) loading coniguration and (b) cross section For relatively thin skins and relatively low core stiness, the bending moment is mainly taken up by the acings, while the shear stress is mainly taken up by the core. The compressive or tensile skin stress σ, is [2]: M M σ = b t ( t + c) b t c Since maximum bending moment is given by: P l M = (2) 4 the compressive or tensile skin breaking load is: (1)
2 ( ) 4 b t t + c σ 4 b t c σ P = (3) l l The shear stress τ c in the core is: V V τ c = b t + c b c ( ) Since shear is given by: P V = (5) 2 the core shear skin breaking load is [3,4]: ( ) (4) P = 2 b t + c τ 2 b c τ (6) CS C C Skin wrinkling is deined as a localized short-wave length buckling o compression skin. It must be viewed as buckling o the compression acing supported on one side by the core. The value o the racture load is given rom the ollowing expression [5]: 2 4 b t c E E C PW = (7) l 12 ( 3 ν C ) ( 1 + ν C ) Indentation o the core occurs at concentrated load, such as ittings, corners, or joints. Practically they can be avoided by applying the load over a suiciently large area [3]. This area can be estimated rom [6]: P A = (8) σ C Where σc is the compressive strength o the core material. Triantaillou and Gibson [6] assumed that the indentation load is dictated by plastic yield o the core but the contribution rom the skins is ignored. This approximation is valid or the case o thin skins but ails or practical sandwich beams. Ashby et al. [7] have considered the indentation strength due to the combined plastic collapse o the ace sheets and core. They treat both the skins and the core as rigid, ideally plastic solids, with the core undergoing compressive yield and the skins orming plastic hinges. This model was conirmed by a series o experiments and detailed numerical simulations on metallic oam cores and aluminium alloy skins [8,9]. In another work [1] it is shown experimentally and by inite element analysis that the indentation load is set by elastic deormation o the aces and compressive yield o the core. These ailure mechanisms are called ductile indentation and elastic indentation respectively [11]. In the case o ailures like delamination and skin-core debonding it is very diicult to perorm a theoretical strength prediction analysis rom the knowledge o the mechanical characteristics o the skin and the core. 2. EXPERIMENTS Four type o symmetrical sandwiches at room temperature by vacuum bagging technique are realised. Structures prepared consist o a common PVC oam core and GFRP skins with one (named M1), two (M2), three (M3) and our layer (M4) respectively. The core is constituted by a closed cell PVC oam (Herex C 7.55 rom Alcan composites) having density o 6 Kg/m3 and thickness c equal to 5 mm.
3 The sandwich beam skins were realized with E-glass mat (randomly oriented ibres, with density o 3 g/m 2 ) and a SR 81 epoxy resin combined with the hardener SR 8822, both supplied by Sicomin, used as matrix. Experimental tests have been carried out by using a Universal Testing Machine (UTM) mod by Instron, equipped with a load cell o 5 KN, with a speed o 1 mm/min. For every sandwich, three point lexural tests were carried out on rectangular samples with width b = 15 mm placing span distance l equal to 4, 5, 6, 8, 1, 12, 14, 16, 18 and 2 mm. For each condition, ive samples have been tested. Average values o skin thickness t are reported in Table 1. M1 M2 M3 M4 3,326 ±,23 1,128 ±,33 1,655 ±,64 2,517 ±,76 4,365 ±,11 1,14 ±,78 1,82 ±,3 2,284 ±,126 5,362 ±,18,95 ±,35 1,823 ±,64 2,419 ±,88 6,358 ±,41,93 ±,3 1,739 ±,24 2,316 ±,39 8,341 ±,24 1,17 ±,58 1,68 ±,14 2,28 ±,65 1,376 ±,26,975 ±,31 1,776 ±,46 2,399 ±,49 12,367 ±,33 1,17 ±,44 1,471 ±,59 2,472 ±,12 14,324 ±,41 1,37 ±,32 1,547 ±,13 2,444 ±,78 16,351 ±,38 1,18 ±,35 1,559 ±,35 2,268 ±,44 18,257 ±,16,849 ±,56 1,545 ±,37 2,395 ±,67 2,277 ±,31 1,45 ±,138 1,67 ±,29 2,41 ±,89 Table 1. Average values o skin thickness or each condition investigated 4. EXPERIMENTAL RESULTS The experimental mechanical tests show that three ailure mechanism have been take place: two dierent indentation ailures (called type I and type II) and tensile ailure o the lower skin. In Figure 3 are showed three typical and representative load/width ratio versus displacement curves, each one relative to a ailure mechanism experimental obtained P/b [N/mm] Indentation type I 8 Indentation type II 4 Tensile skin ailure Strain [%] Figure 2. Flexural test graphs
4 All curve show an initial linear trend with dierent slope. In particular samples ractured or tensile skin ailure and indentation type II have similar slope while the other one shows smaller slope. Indentation type II and tensile skin ailure occur, the irst at higher loads than the second one, with a signiicant loss o the load-carrying capability. In Figure 3 is shown the irst type o indentation. From this picture it is possible to notice that the core yields without skin ailure under localized load. This is a non catastrophic ailure mechanism due to progressive collapse o the cell structure o the oam. In the load application point the densiication o PVC oam takes place due to the initial buckling racture o the cell walls o PVC core; this brings to a strong local width reduction o the sandwich. At high delection the lower skin racture appears. Figure 3. Indentation type I In the case o indentation type II (Figure 4) the upper skin is heavy deormed due to the local applied load. This condition inluence the ailure mechanism that occur in this region due to the collapse o the upper skin. Ater that the crack propagates across the core reaching occasionally the lower skin. In all cases no delamination was evidenced at the skin-core interace. Figure 4. Indentation type II In the case o tensile skin ailure (Figure 5) the crack start in the lower skin. It propagate usually at the skin-core interace beore to propagate across the core. The crack inish at the upper skin-core interace.
5 Figure 5. Tensile skin ailure 4.1 Flexural tests at varying the parameter l The lexural tests results obtained at varying distance span l or a ixed value o skin thickness t are reported in Figure M 1 (a) 2 16 M 2 (b) II T.S. 2 4 I II I I II M 3 (c) T.S Figure 6. Maximum load at varying l or sample M1 (a), M2 (b), M3 (c) and M4 (d) From Figure 6 (a), it s possible to observe that samples M1 (characterized by one layer skin) show only indentation type II ractures except or the sample with l = 3 mm where the ailure occurs or indentation type I. With increasing distance span l a reduction o the maximum load P is obtained As shown in Table 6 samples M2 (characterized by two layer skin) show indentation I ailures or l inerior to 6 mm and indentation type II or the other samples except or the sample with l = 2 mm where tensile skin ailure occurs. The maximum load P decreases with increasing l or the samples that show indentation I instead it remains constant in the range o indentation II (Figure 6 (b)). Samples M3 (three layer skin) show indentation type II ailures or l between 8 mm and 16 mm, indentation type I or l less than 8 mm and tensile skin ailures or l greater than 16 mm. In the range o indentation I, the maximum load P decreases with increasing l. For higher values o l, P assumes constant values or each ailure I II M 4 T.S. (d)
6 mechanisms (an higher value or indentation II than tensile skin) as shown in Figure 6 (c). Samples M4 (our layer skin) show indentation II ailures or l between 8 mm and 14 mm, indentation I or l less than 8 mm and tensile skin or l greater than 14 mm. In the ranges o all ailure mechanisms obtained, the maximum load P presents similar trends like those ones shown or samples M3 as shown in Figure 6 (d). In the cases o samples M3 and M4 (compared with samples M1 and M2) the range o indentation type I becomes larger and ailure by tensile skin becomes prevalent mechanism in a larger area or high values o l with the consequence that range o indentation II become smaller. 4.2 Failure map From the experiments it has been ound how geometrical parameters inluence the racture mode o the sandwiches. These results can be better evidenced creating a ailure map, plotting the ailure mechanisms as a unction o thickness and length. In this map it is possible to notice the existence o three regions in which one o the ailure mechanisms experimental obtained is dominant. 3 2,5 t [mm] 2 Indentation I Indentation II Tensile skin ailure 1,5 1,5 Figure 7. Failure map Particularly or high t and l values tensile skin ailure occurs. At decreasing o l two transition are observed: - Between tensile skin and indentation type II or l values comprised between 14 mm and 18 mm - Between indentation II and indentation I or l values comprised between 3 mm and 6 mm At decreasing o t a transition is observed between tensile skin ailure and indentation II. This transition occurs or t values comprised between,3 mm and 1,7 mm. For intermediate l values ailure mechanism predominant is indentation type II (any value o t). Decreasing l a transition between indentation II and I is observed or l values increasing with t. A ailure mechanism will take place when its breaking load results smaller in comparison o those ones o other competitive mechanisms. As shown in Figure 7, indentation mechanisms are usually obtained whereas tensile skin ailure happens in a limited area o the map (with limited geometrical conditions). This phenomenon can be explained by theoretical consideration. Indentation breaking loads are a unction o core
7 mechanical properties instead tensile skin breaking loads are independent rom these properties as seen in equation (3). Due to low mechanical properties o PVC oam core used in present work, indentations breaking loads result lower than tensile ailure one in most o the tests. 5. CONCLUSIONS In this work, the static ailure modes o E-glass/epoxy composite and closed-cell PVC oam cores sandwich were investigated experimentally by three point lexural tests. The study was ocused on the dependence o geometrical parameters, such as skin thickness (t) and span length between support (l), in the ailure mechanism. Four type o symmetrical sandwiches with dierent number o layers (and consequently dierent thickness) have been prepared and characterized by three point lexural tests varying span length, l (rom 4 to 2 mm). From experimental results a ailure map in the plane t - l has been created identiying three regions o typical ailure modes o the sandwiches. A urther our purpose is to develop in the uture a theoretical model able to orecast the experimental ailure mechanism. In this way predictive capacity o this model could be quite helpul in the sandwich structure design. REFERENCES 1- Corigliano A.Z., Rizzi E. and Papa E., Experimental characterization and numerical simulations o a syntactic-oam/glass-ibre composite sandwich. Composite Science and Technology, 2;6: Konsta-Gdoutos, M.S., and Gdoutos, E.E., The Eect o load and geometry on the ailure modes o sandwich beams. Applied Composite Materials, 25;12: Zenkert D., An introduction to sandwich construction. Sheield, UK: Engineering Material Service; Plantema F., Sandwich Construction. New York: Wiley; Allen H.G., Analysis and design o structural sandwich panels. Pergamon, Triantaillou T., Gibson L.J., Failure mode maps or oam core sandwich beams. Materials Science and Engineering. 1987;95: Ashby M.F., Evans A.G., Fleck N.A., Gibson L.J., Hutchinson J.W., Wadley H.N.G., Metal oams: a design guide. London: Butterworth, Heinemann; 2 8- Chen C., Harte A.M., Fleck N., The plastic collapse o sandwich beams with a metallic oam core. International Journal o Mechanical Sciences, 21;43: McCormack T., Miller R., Kesler O., Gibson L., Failure o sandwich beams with metallic oam cores. International Journal o Solids and Structures, 21;38: Steeves C.A., Fleck N.A., Collapse mechanisms o sandwich beams with composite aces and a oam core, loaded in three-point bending. Part II: experimental investigation and numerical modelling. International Journal o Mechanical Sciences, 24;46: Steeves C.A., Fleck N.A., Material Selection in sandwich beam construction. Scripta Materialia, 24;5: Gibson L.J., Ashby M.F., Sandwich structures, Cellular solids: structure and properties. 2nd ed, Cambridge U.P., Cambridge; 1997.
The effect of transverse shear on the face sheets failure modes of sandwich beams loaded in three points bending
The eect o transverse shear on the ace sheets ailure modes o sandwich beams loaded in three points bending Abstract BOUROUIS FAIROUZ University Mentouri Constantine, Mechanical Department, Algeria Email
More informationDEBOND FRACTURE CHARACTERIZATION IN SANDWICH COMPOSITES UNDER ARCTIC LOW TEMPERATURE CONDITIONS
DEBOND FRACTURE CHARACTERIZATION IN SANDWICH COMPOSITES UNDER ARCTIC LOW TEMPERATURE CONDITIONS Arash Farshidi 1, Christian Berggreen 1 1 Department o Mechanical Engineering, Technical University o Denmark
More informationBEHAVIOUR OF FRP-TO-STEEL BONDED JOINTS
ABSTRACT Proceedings o the International Symposium on Bond Behaviour o FRP in Structures (BBFS ) Chen and Teng (eds) International Institute or FRP in Construction BEHAVIOUR OF FRP-TO-STEEL BONDED JOINTS
More informationEFFECT OF ADHESIVE THICKNESS ON BOND BEHAVIOUR OF CARBON FIBER SHEET UNDER STATIC AND FATIGUE LOADING
EFFECT OF ADHESIVE THICKNESS ON BOND BEHAVIOUR OF CARBON FIBER SHEET UNDER STATIC AND FATIGUE LOADING Hiroya Tamura 1, Ueda Tamon 2, Furuuchi Hitoshi 3 and Seiji Fujima 4 1 Hokkaido Univ., Sapporo 060-8628,
More informationENHANCING IMPACT RESISTANCE OF CONCRETE SLABS STRENGTHENED WITH FRPS AND STEEL FIBERS
ENHANCING IMPACT RESISTANCE OF CONCRETE SLABS STRENGTHENED WITH FRPS AND STEEL FIBERS Doo-Yeol Yoo PhD candidate Korea University 1, -ga, Anam-dong, Seongbuk-gu, Seoul, 136-713, South Korea dooyoul@korea.ac.kr
More informationPerformance of Pretensioning Prestressed Concrete Beams with Ruptured Strands Flexurally Strengthened by CFRP Sheets
Perormance o Pretensioning Prestressed Concrete Beams with Ruptured Strands Flexurally Strengthened by CFRP Sheets Thi Thu Dung NGUYEN 1, Koji MATSUMOTO 2, Asami IWASAKI 3, Yuji SATO 3 and Junichiro NIWA
More informationSHEAR STRENGTHENING OF CONTINUOUS RC BEAMS USING EXTERNALLY BONDED CFRP SHEETS
SHEAR STRENGTHENING OF CONTINUOUS RC BEAMS USING EXTERNALLY BONDED CFRP SHEETS Ahmed Khalia, Gustavo Tumialan, Antonio Nanni, and Abdeldjelil Belarbi Synopsis: This paper presents the results o an experimental
More informationCFRP RETROFIT OF MASONRY WALLS. Abstract
CFRP RETROFIT OF MASONRY WALLS Jon Vandergrit, Laurene & Rickher, Charlotte, NC Janos Gergely, UNC Charlotte, Charlotte, NC David T. Young, UNC Charlotte, Charlotte, NC Abstract This study is concerned
More informationPERFORMANCE OF PRE-CRACKED RC BEAMS SHEAR STRENGTHENED WITH NSM CFRP LAMINATES
PERORMANCE O PRE-CRACKED RC BEAMS SHEAR STRENGTHENED WITH NSM CRP LAMINATES Salvador DIAS Assistant Proessor ISISE - University o Minho Azurém, 4810-058 Guimarães, Portugal sdias@civil.uminho.pt Joaquim
More informationShear Strength of GFRP RC Beams and Slabs
Shear Strength o GFRP RC Beams and Slabs T. Alkhrdaji, M. Wideman, A. Belarbi, & A. Nanni Department o Civil Engineering, University o Missouri-Rolla, Missouri, USA ABSTRACT: ACI Committee 440 has proposed
More informationPERFORMANCE-BASED SEISMIC DESIGN OF REINFORCED CONCRETE BRIDGE COLUMNS
PERFORMANCE-BASED SEISMIC DESIGN OF REINFORCED CONCRETE BRIDGE COLUMNS Dawn E LEHMAN 1 And Jack P MOEHLE 2 SUMMARY There is a new ocus in seismic design on the perormance o reinorced concrete bridges.
More informationExperimental study on the capacity of RC beams strengthened in shear by CFRP-sheets
Fourth International Conerence on FRP Composites in Civil Engineering (CICE2008) 22-24July 2008, Zurich, Switzerland Experimental study on the capacity o RC beams strengthened in shear by CFRP-sheets E.
More informationComparison Study and Mechanical Characterisation of a Several Composite Sandwich Structures
International Journal o Composite Materials 015, 5(1): 1-8 DOI: 10.593/j.cmaterials.0150501.01 Comparison Study and Mechanical Characterisation o a Several Composite Sandwich Structures Jamal Arbaoui 1,,*,
More informationMACROSCOPIC MODELING OF FINE LINE ADHESION TESTS
π Mater. Res. Soc. Proc. Vol. 563, 1999 Symposium M: Material Reliability in Microelectronics IX MACROSCOPIC MODELING OF FINE LINE ADHESION TESTS A.A. Volinsky, J.C. Nelson, W.W. Gerberich * * University
More informationSHEAR AND DIAGONAL TENSION IN BEAMS
CHAPTER REINFORCED CONCRETE Reinorced Concrete Design Fith Edition A Fundamental Approach - Fith Edition SHEAR AND DIAGONAL TENSION IN BEAMS A. J. Clark School o Engineering Department o Civil and Environmental
More informationTesting of a Laterally Stable Eccentrically Braced Frame for Steel Bridge Piers
.1.. Testing o a Laterally Stable Eccentrically Braced Frame or Steel Bridge Piers Jerey W. Berman Ph.D. Student, Dept. o Civil Structural and Environmental Engineering, University at Bualo Research Supervisor:
More informationIswandi Imran 1 and Mujiman 2
Malaysian Journal o Civil Engineering 21(2) : 152-167 (2009) SHEAR STRENGTHENING OF R/C BEAMS USING AFRP STIRRUPS WITH ANCHORED ENDS Iswandi Imran 1 and Mujiman 2 1 Fac. o Civil and Env. Eng., Institut
More information1. INTRODUCTION. Table 1 Mechanical Property of Strand-sheet High-tension CFRP Tensile Modulus (GPa) 245 Tensile strength (N/mm 2 )
T1A2 Experimental Study on ening Eect o CFRP Strand Sheet on RC Beams Applied with Several Kinds o Adhesives Atsuya. Komori. And Kenshi. Taniguchi Inrastructural Use Div., Nippon steel materials Co., Ltd,
More informationThe Flexural Properties of Glass Fabric/Epoxy -Rigid Polyurethane Foam Core Sandwich Composites at Different Span to Depth Ratios and Densities
Proc. of the Intl. Conf. on Advances In Engineering And Technology - ICAET-214 ISBN: 978-1-63248-28-6 doi: 1.15224/ 978-1-63248-28-6-3-87 The Flexural Properties of Glass Fabric/Epoxy -Rigid Polyurethane
More informationThe Measurement and Significance of Green Sheet Properties for the Properties of Hardened Fibre Cement By A M Cooke, M.App.
The Measurement and Signiicance o Green Sheet Properties or the Properties o Hardened Fibre Cement By A M Cooke, M.App.Sc, MRACI, MAIChE Principal, Building Materials and Technology Pty Ltd, Canberra,
More informationFlexural behaviour of a polymeric foam/glass-fibre composite: FE modelling and experimental testing
Flexural behaviour of a polymeric foam/glass-fibre composite: FE modelling and experimental testing G. Belingardi, M. P. Cavatorta & L. Peroni Department of Mechanical Engineering, Politecnico di Torino,
More informationFIBER LENGTH EFFECT ON TENSILE AND COMPRESSIVE STRENGTH OF SHORT FIBER REINFORCED THERMOPLASTICS
FIBER LENGTH EFFECT ON TENSILE AND COMPRESSIVE STRENGTH OF SHORT FIBER REINFORCED THERMOPLASTICS Y. Wan a* and J. Takahashi a a Department o Systems Innovation, School o Engineering, the University o Tokyo,7-3-1,
More informationImpact Compressive Failure of a Unidirectional Carbon/Epoxy Composite: Effect of Loading Directions
Applied Mechanics and Materials Online: 28-7-11 ISSN: 1662-7482, Vols. 13-14, pp 195-21 doi:1.428/www.scientiic.net/amm.13-14.195 28 Trans Tech Publications, Switzerland Impact Compressive Failure o a
More informationEXPERIMENTAL AND COMPUTATIONAL INVESTIGATION OF THE CYCLIC MECHANICAL BEHAVIOR AND DAMAGE EVOLUTION OF DISTALOY AE + 0.5% C
Powder Metallurgy Progress, Vol.11 (2011), No 1-2 141 EXPERIMENTAL AND COMPUTATIONAL INVESTIGATION OF THE CYCLIC MECHANICAL BEHAVIOR AND DAMAGE EVOLUTION OF DISTALOY AE + 0.5% C M. Schneider, H. Yuan Abstract
More informationNumerical Investigation of Short Seismic Links in Shear
EUROSTEEL 2017, September 13 15, 2017, Copenhagen, Denmark Numerical Investigation o Short Seismic Links in Shear Mladen Bulic*,a, Mehmed Causevic a a University o Rijeka, Faculty o Civil Engineering,
More informationTHE 18 th CHESAPEAKE SAILING YACHT SYMPOSIUM. ARPRO : A New Structural Core Material for the Yacht Industry
THE 18 th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 007 ARPRO : A New Structural Core Material for the Yacht Industry Corrado Labriola, JSP Vito Tagarielli, Cambridge University, Cambridge,
More informationMATERIAL BEHAVIOR IN METAL FORMING
MATERIAL BEHAVIOR IN METAL FORMING Considerable insight about the behavior o metals during orming can be obtained rom the stressstrain curve. The typical stress-strain curve or most metals is divided into
More informationChidananda S. H, Khadiranaikar R. B., International Journal of Advance Research, Ideas and Innovations in Technology. 1.
Chidananda S. H, Khadiranaikar R. B., International Journal o Advance Research, Ideas and Innovations in ISSN: 2454-132X Impact actor: 4.295 (Volume3, Issue5) Available online at www.ijariit.com Flexural
More informationTitle. Author(s)Ueda, Tamon; Dai, Jianguo. CitationProgress in Structural Engineering and Materials, 7( Issue Date Doc URL. Rights.
Title Interace bond between FRP sheets and concrete subst behaviour Author(s)Ueda, Tamon; Dai, Jianguo CitationProgress in Structural Engineering and Materials, 7( Issue Date 2005-01 Doc URL http://hdl.handle.net/2115/5775
More informationResearch Article Stress Distribution on Sandwich Structure with Triangular Grid Cores Suffered from Bending Load
Aerospace Engineering Volume 2015, Article ID 723487, 8 pages http://dx.doi.org/10.1155/2015/723487 Research Article Stress Distribution on Sandwich Structure with Triangular Grid Cores Suffered from Bending
More informationWood Fibre Insulation Boards as Load-Carrying Sheathing Material of Wall Panels
irst published in: Wood ibre Insulation Boards as Load-Carrying Sheathing Material o Wall Panels Gunnar Gebhardt 1, Hans Joachim Blaß ABSTRACT: To date wood ibre insulation boards (WIB) are used as thermal
More informationコンクリート工学年次論文集,Vol.37,No.2,2015 FLEXURAL STRENGTHENING EFFECT OF CFRP STRAND SHEETS AND PCM ON RC BEAMS -Technical Paper- Rifadli BAHSUAN *1, Shinichi
コンクリート工学年次論文集,Vol.37,No.2,2015 FLEXURAL STRENGTHENING EFFECT OF CFRP STRAND SHEETS AND PCM ON RC BEAMS -Technical Paper- Riadli BAHSUAN *1, Shinichi HINO *2, Kohei YAMAGUCHI *3 and Atsuya KOMORI *4 ABSTRACT
More informationInfluence of web openings on bearing capacity of triangularly corrugated web beam
IOP Conerence Series: Materials Science and Engineering PAPER OPEN ACCESS Inluence o web openings on bearing capacity o triangularly corrugated web beam To cite this article: Sergey Kudryavtsev 2018 IOP
More informationMechanical Characterization of PU Based Sandwich Composites with Variation in Core Density
International Journal of Materials Science and Applications 2015; 4(4): 277-282 Published online July 17, 2015 (http://www.sciencepublishinggroup.com/j/ijmsa) doi: 10.11648/j.ijmsa.20150404.19 ISSN: 2327-2635
More informationFinite Element Modeling of Reinforced Concrete Beam Patch Repaired and Strengthened with Fiber-Reinforced Polymers
International Journal o Engineering and Technical Research (IJETR) ISSN: 2321-0869 (O) 2454-4698 (P), Volume-4, Issue-3, March 2016 Finite Element Modeling o Reinorced Concrete Beam Patch Repaired and
More informationMechanical Response of Porous Copper Manufactured by Lost Carbonate Sintering Process
Materials Science Forum Vols. 539-543 (7) pp. 1863-1867 online at http://www.scientific.net (7) Trans Tech Publications, Switzerland Mechanical Response of Porous Copper Manufactured by Lost Carbonate
More informationInnovative Application of FRPs for Seismic Strengthening of RC Shear Wall
SP-230 72 Innovative Application o FRPs or Seismic Strengthening o RC Shear Wall by K. Kobayashi Synopsis: The small holes were drilled at the grid intersection on the concrete wall panel. A bundle o aramid
More informationInvestigation Into The Floor Diaphragm Flexibility In Rectangular Reinforced Concrete Buildings And Error Formula
The th World Conerence on Earthquake Engineering October 7, 008, Beijing, China Investigation Into The Floor Diaphragm Flexibility In Rectangular Reinorced Concrete Buildings And Error Formula M. Moeini,
More informationModeling of the Shear Behavior of Unreinforced and Strengthened Masonry Walls
Modeling o the Shear Behavior o Unreinorced and Strengthened Masonry Walls H.O. Köksal Çanakkale 18 Mart University, Çanakkale,Turkey O. Jaarov & B. Doran Yıldız Technical University, Istanbul,Turkey C.
More informationA METHOD OF STRENGTHENING MONITORED DEFICIENT BRIDGES BRANDON RICHARD DECKER. B.S., Kansas State University, 2005 A THESIS
A METHOD OF STRENGTHENING MONITORED DEFICIENT BRIDGES by BRANDON RICHARD DECKER B.S., Kansas State University, 2005 A THESIS submitted in partial ulillment o the requirements or the degree MASTER OF SCIENCE
More informationSTRENGTH ASSESSMENT OF MEMBRANE-TYPE LNG CONTAINMENT SYSTEM
STRENGTH ASSESSMENT OF MEMBRANE-TYPE LNG CONTAINMENT SYSTEM B Wang, J W Kim, Y Shin, American Bureau o Shipping, USA Originally presented at the RINA Conerence ICSOT 6 on LNG held September 14-15, 6, in
More informationI Recommendations for Upgrading of Concrete Structures with Use of Continuous Fiber Sheets
CHAPTER 3 MATERIALS 3.1 General The continuous iber sheets or continuous iber strands used or upgrading shall be those whose quality has been conirmed. Quality shall be conirmed or the primer, the impregnation
More informationFinite element analysis of Carbon composite sandwich material with agglomerated Cork core
Available online at www.sciencedirect.com Procedia Engineering 10 (2011) 478 483 ICM11 Finite element analysis of Carbon composite sandwich material with agglomerated Cork core S.Sathis Kumar a,b, *, M.
More informationThe dynamic response of clamped composite sandwich beams
The dynamic response of clamped composite sandwich beams V.L. Tagarielli, V.S. Deshpande and N.A. Fleck * Cambridge University Engineering Dept. Trumpington St., Cambridge, CB2 1PZ, UK Abstract The dynamic
More informationFlexural Behavior of Sandwich Composite Panels Under 4-Point Loading
International Journal of Materials Science ISSN 0973-4589 Volume 11, Number 1 (2016), pp. 47-55 Research India Publications http://www.ripublication.com Flexural Behavior of Sandwich Composite Panels Under
More informationDeformation by V-bending of Thick Plate Metal 5083
Proceedings o the 12th International Conerence on Aluminium Alloys, September 5-9, 21, Yokohama, Japan 21 The Japan Institute o Light etals pp. 619-624 619 Deormation by V-bending o Thick Plate etal 583
More informationInternational Journal of Mechanical Sciences 46 (2004) Craig A. Steeves, Norman A. Fleck
nternational Journal of Mechanical Sciences 46 (24) 585 68 Collapse mechanisms of sandwich beams with composite faces and a foam core, loaded in three-point bending. Part : experimental investigation and
More informationTEST OF PRESTRESSED CONCRETE T-BEAMS RETROFITTED FOR SHEAR AND FLEXURE USING CARBON FIBER REINFORCED POLYMERS
TEST OF PRESTRESSED CONCRETE T-BEAMS RETROFITTED FOR SHEAR AND FLEXURE USING CARBON FIBER REINFORCED POLYMERS Alison Agapay Ian N. Robertson Prepared in cooperation with the: State o Hawaii Department
More informationDESIGN WITH METHOD. 1. Introduction. 2. Material properties. Test and Design Methods for Steel Fibre Reinforced Concrete 31
Test and Design Methods or Steel Fibre Reinorced Concrete 31 DESIGN WITH METHOD Lucie Vandewalle Katholieke Universiteit Leuven, Belgium Abstract The inal recommendation o the design method, proposed by
More informationProgress report Material characterization and impact performance of Semi Impregnated Micro-Sandwich structures, SIMS
Progress report Material characterization and impact performance of Semi Impregnated Micro-Sandwich structures, SIMS Dipartimento di Ingegneria Meccanica e Aerospaziale By. Prof. G. Belingardi, Alem.T.
More informationten reinforced concrete construction Concrete Concrete Materials Concrete Construction columns beams slabs domes footings
APPLIED ACHITECTURAL STRUCTURES: STRUCTURAL ANALYSIS AND SYSTEMS DR. ANNE NICHOLS SPRING 018 lecture ten Concrete columns beams slabs domes ootings http://nisee.berkeley.edu/godden reinorced concrete construction
More informationTHE EFFECT OF DIFFERENT TYPES OF CORE MATERIAL ON THE FLEXURAL BEHAVIOR OF SANDWICH COMPOSITES FOR WIND TURBINE BLADES
THE EFFECT OF DIFFERENT TYPES OF CORE MATERIAL ON THE FLEXURAL BEHAVIOR OF SANDWICH COMPOSITES FOR WIND TURBINE BLADES ABSTRACT Mechanical Engineering, Imperial College London, London, United Kingdom 2
More informationInvestigation of the Effect of Fiber Orientation on Mechanical Properties of Composite Laminate Using Numerical Analysis
International Journal of Advanced Mechanical Engineering. ISSN 2250-24 Volume 4, Number 5 (2014), pp. 501-508 Research India Publications http://www.ripublication.com Investigation of the Effect of Fiber
More informationPLASTIC DESIGN OF STAINLESS STEEL STRUCTURES
SDSS Rio 2010 STABILITY AND DUCTILITY OF STEEL STRUCTURES E. Batista, P. Vellasco, L. de Lima (Eds.) Rio de Janeiro, Brazil, September 8-10, 2010 PLASTIC DESIGN OF STAINLESS STEEL STRUCTURES Marios Theofanous*
More informationas shown in Fig. 1 (b). The geometry o specimens is shown in Table 2. All specimens were coated with epoxy resin, and cured or a week. GFRP tabs were
コンクリート工学年次論文集,Vol.36,No.2,214 - Technical Paper - EXPERIMENTAL STUDY ON SHEAR BEHAVIOR OF RC BEAMS JACKETED BY FLAX FIBER SHEET Kosuke TAKASAKI *1, Tidarut JIRAWATTANASOMKUL *2, Dawei ZHANG *3 and Tamon
More informationCFRP group effect and interaction between stirrups and strips on the NSM-shear strengthening of RC beams
600 Fourth International Conerence on FRP Composites in Civil Engineering (CICE2008) 22-24July 2008, Zurich, Switzerland CFRP group eect and interaction between stirrups and strips on the NSM-shear strengthening
More informationShear failure of reinforced concrete beams with steel fibre reinforcement
Eindhoven University o Technology MASTER Shear ailure o reinorced concrete beams with steel ibre reinorcement Krings, H. Award date: 2014 Disclaimer This document contains a student thesis (bachelor's
More informationCharacterization of Fracture Toughness G (sub c) of PVC and PES Foams
Cleveland State University EngagedScholarship@CSU Mechanical Engineering Faculty Publications Mechanical Engineering Department 5-2011 Characterization of Fracture Toughness G (sub c) of PVC and PES Foams
More informationMECHANICAL CHARACTERIZATION OF SANDWICH STRUCTURE COMPRISED OF GLASS FIBER REINFORCED CORE: PART 1
Composites in Construction 2005 Third International Conference Lyon, France, July 11 13, 2005 MECHANICAL CHARACTERIZATION OF SANDWICH STRCTRE COMPRISED OF GLASS FIBER REINFORCED CORE: PART 1 S.V. Rocca
More informationThe dynamic response of composite sandwich beams to transverse impact
International Journal of Solids and Structures 44 (27) 2442 247 www.elsevier.com/locate/ijsolstr The dynamic response of composite sandwich beams to transverse impact V.L. Tagarielli, V.S. Deshpande, N.A.
More informationAnalysis and optimization of Composite Sandwich Structures using Optistruct
Analysis and optimization of Composite Sandwich Structures using Optistruct Venkatesh. P 1 1 M. Tech Student, Dept of Mechanical Engineering, Malla Reddy College of Engineering & Technology, Secunderabad
More informationMICRO-MECHANICAL DAMAGE MODELLING OF NOTCHED BAR TESTING OF MODERN LINE PIPE STEEL
MICRO-MECHANICAL DAMAGE MODELLING OF NOTCHED BAR TESTING OF MODERN LINE PIPE STEEL S. H. Hashemi, I. C. Howard, J. R. Yates and R. M. Andrews * The University o Sheield, Department o Mechanical Engineering,
More informationAn Analysis on the Parameters influencing failure in Tube Hydro forming A review
An Analysis on the Parameters inluencing ailure in Tube Hydro orming A review S. John Alexis 1 Dr. G. Chandramohan 2 1. Assistant Proessor, Department o Mechanical Engineering, Sri Krishna College o Engineering
More informationEffect of UD Carbon on the Specific Mechanical Properties of Glass Mat Composites for Marine Applications
Effect of UD Carbon on the Specific Mechanical Properties of Glass Mat Composites for Marine Applications A. ALENZA AND. FIORE* Dipartimento di Ingegneria Chimica dei Processi e dei Materiali University
More informationHassan Aoude * & Michael Cohen Department of Civil Engineering, University of Ottawa, Ottawa, Canada
Shear Response o SFRC Beams Constructed with SCC and Steel Fibers Hassan Aoude * & Michael Cohen Department o Civil Engineering, University o Ottawa, Ottawa, Canada * haoude@uottawa.ca ABSTRACT: This paper
More informationConsiderations for Use of HSS in Seismic Frame Systems
Considerations or Use o in Seismic Sstems b Jason McCormick Associate Proessor, Civil & nvironmental ngineering, Universit o Michigan, Ann Arbor, MI, USA Hollow structural sections () have man avorable
More informationINFLUENCE OF CARBON FIBER REINFORCED POLYMERS ON UPGRADING SHEAR BEHAVIOR OF RC COUPLING BEAMS *
IJST, Transactions o Civil Engineering, Vol. 35, No. C2, pp 155-169 Printed in The Islamic Republic o Iran, 2011 Shiraz University INFLUENCE OF CARBON FIBER REINFORCED POLYMERS ON UPGRADING SHEAR BEHAVIOR
More informationPHYSICAL AND MECHANICAL PROPERTIES OF ULTRA-HIGH PERFORMANCE CONCRETES -Abstract-
FACULTY OF CIVIL ENGINEERING Ing. Şoşa Pavel Ioan Ph.D. THESIS PHYSICAL AND MECHANICAL PROPERTIES OF ULTRA-HIGH PERFORMANCE CONCRETES -Abstract- Ph.D. Supervisor, Pro.dr.ing.Cornelia MĂGUREANU Scientiic
More informationFlexural Behaviour of Sandwich Composite Panels Fabricated Through Different Vacuum Bagging Techniques
Journal of Materials Science & Surface Engineering Vol. 3 (4), 2015, pp 293-297 Contents lists available at http://www.jmsse.org/ Journal of Materials Science & Surface Engineering Flexural Behaviour of
More informationRESPONSE ESTIMATION OF REINFORCED CONCRETE COLUMNS SUBJECTED TO LATERAL LOADS. A Thesis. Presented in Partial Fulfillment of the Requirements for
RESPONSE ESTIMATION OF REINFORCED CONCRETE COLUMNS SUBJECTED TO LATERAL LOADS A Thesis Presented in Partial Fulillment o the Requirements or the Degree Master o Science in the Graduate School o The Ohio
More informationCrack Control of Fibre Reinforced Concrete
Crack Control o Fibre Reinorced Concrete Presenter Biography Dr. Izni Syahrizal bin Ibrahim Working in UTM since 1998 Has been actively involved in the research o ibre reinorced concrete since 2008 Published
More informationStudent Research & Creative Works
Scholars' Mine Masters Theses Student Research & Creative Works Fall 2007 Perormance evaluation o existing analytical methods to compute the shear contribution provided by externally bonded FRP sheets
More informationPyramidal lattice truss structures with hollow trusses
Materials Science and Engineering A 397 (2005) 132 137 Pyramidal lattice truss structures with hollow trusses Douglas T. Queheillalt, Haydn N.G. Wadley Department of Materials Science and Engineering,
More informationBendt Aarup Manager CRC Technology ApS Østermarken 119, DK-9320 Hjallerup
1 Slender Columns Bendt Aarup Manager Technology ApS Østermarken 119, DK-930 Hjallerup -mail: bka@crc-tech.dk Lars Rom Jensen Chie design engineer Hi-Con ApS Gørtlervej 8, DK-930 Hjallerup -mail: lrj@hi-con.dk
More informationFracture Behaviours in Compression-loaded Triangular Corrugated Core Sandwich Panels
Fracture ehaviours in ompression-loaded Triangular orrugated ore Sandwich Panels N.Z.M. Zaid 1,*, M.R.M. Rejab 1,.F. Jusoh 1,. achtiar 1, J.P. Siregar 1, and Zhang ian ping 2 1 Faculty of Mechanical Engineering,
More informationTAILORED STIFFNESS OF BALSA SANDWICH CORE MATERIAL
TAILORED STINESS O BALSA SANDWICH CORE MATERIAL J. A. Kepler Aalborg University, Department of Mechanical Engineering Pontoppidanstraede 101, 9220 Aalborg East, Denmark jk@me.aau.dk SUMMARY A concept for
More informationTHE ENERGY ABSORPTION OF ALUMINIUM HONEYCOMB UNDER QUASI-STATIC LOADING
4 th International Conference on Mechanical Engineering, December 26-28, 2001, Dhaka, Bangladesh/pp. I 35-40 THE ENERGY ABSORPTION OF ALUMINIUM HONEYCOMB UNDER QUASI-STATIC LOADING Dr. Md Radzai Said*
More informationThe out-of-plane compressive behavior of metallic honeycombs
Materials Science and Engineering A 380 (2004) 272 280 The out-of-plane compressive behavior of metallic honeycombs F. Côté a, V.S. Deshpande a, N.A. Fleck a,, A.G. Evans b a Cambridge University Engineering
More informationFinite Element Analysis on the Unloading Elastic Modulus of Aluminum Foams by Unit-cell Model
IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Finite Element Analysis on the Unloading Elastic Modulus of Aluminum Foams by Unit-cell Model To cite this article: F Triawan
More informationKeywords: Basalt fiber reinforced polymer, pre-reinforcement, T-section reinforced concrete beam, ultimate flexural capacity.
Send Orders or Reprints to reprints@benthamscience.ae The Open Construction and Building Technology Journal, 215, 9, 277-286 277 Open Access Experimental Research on the Flexural Capacity o Reinorced Concrete
More informationElastic versus Plastic Analysis of Structures
Elastic versus Plastic Analysis of Structures 1.1 Stress-Strain Relationships 1.2 Plastic Design Versus Elastic Design Chapter 1 Basic Concepts of Plastic Analysis 1.3 Elastic-Plastic Bending of Beams
More informationStrength Evaluation of Reinforced Concrete Beam-Column Joints
Strength Evaluation o Reinorced Concrete Beam-Column Joints H. Y. Choi & J. Y. Lee Dept. o Architectural Engineering, Sungkyunkwan University, Korea SUMMARY Joint research by three countries (America,
More informationEFFECTS OF HIGH STRAIN RATE ON LOW-CYCLE FATIGUE BEHAVIOR OF STRUCTURAL STEEL IN LARGE PLASTIC STRAIN REGION
Journal o JSCE, Vol. 4, 118-133, 2016 EFFECTS OF HIGH STRAIN RATE ON LOW-CYCLE FATIGUE BEHAVIOR OF STRUCTURAL STEEL IN LARGE PLASTIC STRAIN REGION Natdanai SINSAMUTPADUNG 1, Eiichi SASAKI 2 and Hiroshi
More informationFAILURE PREDICTION IN HONEYCOMB SANDWICH BEAMS UNDER LOW-VELOCITY IMPACT
18 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS FAILURE PREDICTION IN HONEYCOMB SANDWICH BEAMS UNDER LOW-VELOCITY IMPACT I. Ivañez 1 *, C. Santiuste 1, E. Barbero 1, S. Sanchez-Saez 1 1 Department
More informationStrut Failure Investigation of Paseo Suspension Bridge in Kansas City, MO
Strut Failure Investigation o Paseo Suspension Bridge in Kansas City, MO A proposal submitted to Missouri Department o Transportation by Genda Chen and Lokesh Dharani rom University o Missouri-Rolla Introduction
More informationaddress: / Tel.: +44 (0)
The influence of different types of core materials on the impact behaviour of sandwich composites Cihan Kaboglu *, Mechanical Engineering, Imperial College London, South Kensington Campus, London, SW7
More informationAXIAL LOAD BEHAVIOR OF RECTANGULAR CONCRETE COLUMNS CONFINED WITH FRP COMPOSITES
FRPRCS-8 University o Patras, Patras, Greece, July 16-18, 7 AXIAL LOAD BEHAVIOR OF RECTANGULAR CONCRETE COLUMNS CONFINED WITH FRP COMPOSITES Houssam A. TOUTANJI 1 Meng HAN 1 Stijn MATTHYS 1 Dept. o Civil
More informationTORSIONAL STRENGTHENING OF SPANDREL BEAMS WITH COMPOSITE LAMINATES. Abstract
TORSIONAL STRENGTHENING OF SPANDREL BEAMS WITH COMPOSITE LAMINATES Pedro Salom, Zapata Engineering, Charlotte, NC Janos Gergely, UNC Charlotte, Charlotte, NC David T. Young, UNC Charlotte, Charlotte, NC
More informationDesign and Construction of a Bridge Deck using Mild and Post-Tensioned FRP Bars
SP-230 63 Design and Construction o a Bridge Deck using Mild and Post-Tensioned FRP Bars by R. Fico, N. Galati, A. Prota, and A. Nanni Synopsis: The type o structure selected or this research project is
More informationNUMERICAL STUDY ON RESIDUAL THERMAL STRESSES IN CARBON FIBRE PULLOUT
28 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES NUMERICAL STUDY ON RESIDUAL THERMAL STRESSES IN CARBON FIBRE PULLOUT Y. -Y. Jia*, W.-Y. Yan*, H.-Y. Liu** *Department o Mechanical and Aerospace
More informationREPLACEMENT OF CONVENTIONAL STEEL STIRRUPS BY INTERNAL REINFORCING CFRP GRIDS IN SHEAR OF CONCRETE BEAMS
Journal o JSCE, Vol. 5, 377-391, 217 REPLACEMENT OF CONVENTIONAL STEEL STIRRUPS BY INTERNAL REINFORCING CFRP GRIDS IN SHEAR OF CONCRETE BEAMS Sirapong SUWANPANJASIL 1, Takuro NAKAMURA 2, Koji MATSUMOTO
More informationPrediction of FRP Contribution to the Shear Resistance of RC Beams Using Artificial Neural Networks
Prediction o FRP Contribution to the Shear Resistance o RC Beams Using Artiicial Neural Networks H. Naderpour 1, A. Kheyroddin 2, M. K. Sharbatdar 1, G. Ghodrati Amiri 3, S. R. Hoseini Vaez 4 1- Assistant
More informationStatic and Fatigue Behaviour of Hexagonal Honeycomb Cores under In-plane Shear Loads
Appl Compos Mater (2012) 19:97 115 DOI 10.1007/s10443-010-9184-5 Static and Fatigue Behaviour of Hexagonal Honeycomb Cores under In-plane Shear Loads Gabriel Bianchi & Guglielmo S. Aglietti & Guy Richardson
More informationThe Riddle of Determining the True Tensile strength of Normal and High Strength Concrete
The Riddle o Determining the True Tensile strength o Normal and High Strength Concrete Mohammed Raoo 1) and Abbas Senussi 2) 1). School o Civil and Building Engineering, Loughborough University, Leics.
More informationEXPERIMENTAL STUDY ON DOUBLE LAP JOINTS COMPOSED OF HYBRID CFRP/GFRP LAMINATE
EXPERIMENTAL STUDY ON DOUBLE LAP JOINTS COMPOSED OF HYBRID CFRP/GFRP LAMINATE Hiroshi MUTSUYOSHI 1) and Nguyen Duc HAI 1) 1) Structural Material Lab., Department of Civil and Environmental Engineering,
More informationsixteen steel construction: materials & beams Steel Beam Design Steel Properties Steel Materials American Institute of Steel Construction steel grades
ELEENTS OF ARCHITECTURAL STRUCTURES: FOR, BEHAVIOR, AND DESIGN DR. ANNE NICHOLS SPRING 015 lecture sixteen Steel Beam Design American Institute o Steel Construction anual o Steel Construction ASD & LRFD
More informationFunction-integrated GFRP sandwich roof structure Experimental validation of design
Fourth International Conference on FRP Composites in Civil Engineering (CICE2008) 22-24July 2008, Zurich, Switzerland Function-integrated GFRP sandwich roof structure Experimental validation of design
More informationMECHANICAL PROPERTIES OF COMPOSITE SANDWICH STRUCTURES WITH CORE OR FACE SHEET DISCONTINUITIES
1 Introduction THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS MECHANICAL PROPERTIES OF COMPOSITE SANDWICH STRUCTURES WITH CORE OR FACE SHEET DISCONTINUITIES E.R Fotsing, M. Sola, E. Ruiz *,
More informationBEHAVIOR OF FRP SANDWICH PANELS FOR TRANSPORTATION INFRASTRUCTURE
IV ACMBS MCAPC 4 th International Conference on Advanced Composite Materials in Bridges and Structures 4 ième Conférence Internationale sur les matériaux composites d avant-garde pour ponts et charpentes
More informationNumerical simulation of bending and failure behaviour of z-core sandwich panels
Numerical simulation of bending and failure behaviour of z-core sandwich panels D. Zangani* 1, M. Robinson 2, A. G. Gibson 2, L. Torre 3 and J. A. Holmberg 4 The failure behaviour of fibreglass sandwich
More information