Machine and Vehicle Design: Master Thesis presentation

Transcription

1 Politecnico di Milano since 1863 Machine and Vehicle Design: Master Thesis presentation (June 2014) POLITECNICO DI MILANO, ITALY DIPARTIMENTO DI MECCANICA

2 Hydrogen embrittlement TITLE: Numerical simulation of hydrogen embrittlement 1. Numerical simulation of hydrogen embrittlement in high strength steels 2. Implementation of FE model in Abaqus, by self-developed sub-routines 3. Stress and mass diffusion static analyses to simulate fracture toughness static tests, validated by comparison with experimental tests METHODOLOGY: Mainly numerical (FEM) DURATION: 9-12 months ENI Tenaris Dalmine Cohesive elements layer to simulate crack propagation F VLL Crack tip

3 Hybrid composites TITLE: Impact analysis behaviour on hybrid panels 1. Experimental impact tests on hybrid panels (plastic + metal sheets) 2. Evaluation of the residual mechanical characteristics 3. Quantification on the induced damage by experimental mechanical and thermographic analyses, for different combination of thickness, materials and impact energies METHODOLOGY: Experimental DURATION: 9-12 months laura.vergani@polimi.it chiara.colombo@polimi.it Institute of Metallurgy, University of Clausthal (Germany)

4 Thermographic methods on composites TITLE: Application of experimental thermography on composite materials 1. Experimental application of non-destructive thermographic techniques to quantify static and fatigue-induced damage 2. Possible application to a wide range of composites, as glass, carbon and basalt reinforced composites METHODOLOGY: Mainly experimental DURATION: 9 months laura.vergani@polimi.it chiara.colombo@polimi.it Flavia.libonati@polimi.it Institute of Polymers and Plastics, University of Clausthal (Germany)

5 Fracture behavior of bone TITLE: Numerical and experimental study of the mechanical behavior of cortical bone 1. Experimental testing of bovine cortical bone tissue 2. Numerical simulations (FEM) of crack propagation effect of the microstructure 3. Atomistic simulations (MD) of the nanoscale toughening mechanisms METHODOLOGY: Analytical - Numerical Experimental DURATION: 9-12 months laura.vergani@polimi.it flavia.libonati@polimi.it Clausthal University of Technology Massachusetts Institute of Technology

6 Design of new biomimetic composites TITLE: Design of innovative biomimetic composite via a biomimetic approach 1. Design (FEM) of a bio-inspired composite 2. Manufacturing 3. Experimental testing METHODOLOGY: Analytical - Numerical Experimental DURATION: 9-12 months laura.vergani@polimi.it flavia.libonati@polimi.it chiara.colombo@polimi.it Clausthal University of Technology *(possibility of performing the thesis in Germany)

7 Linearization of FEM model TITLE: Linearization of complex nonlinear FE models for aeroelastic analyses. 1. Identify optimal solutions for linearizing complex non linear FE models aimed to describe pylon-store interaction 2. Verify possibility to generate non linear model in state space METHODOLOGY: analytical numerical experimental (exploitation existing results) DURATION: 9 months andrea.manes@polimi.it AleniaAermacchi

8 Optimal Composite protections TITLE: Optimization of composite fabric protections. 1. Optimization of the geometry of the fabric: 2D fabric, 3D fabric, different orientation of the layers. 2. Optimization of the materials: different yarns materials (Kevlar, Dyneema, Carbon, Glass, Metal); different matrix materials (Epoxy, Polyester). METHODOLOGY: analytical numerical experimental (exploitation existing results) DURATION: 9 months andrea.manes@polimi.it Università di Cassino

9 Microindentation technique TITLE: Characterization of mechanical properties of materials by means of microindentation technique 1. Investigation on microindentation technique combined with reverse engineering to acquire mechanical properties of material 2. Identification of test cases in order to compare results with consolidated approaches METHODOLOGY: Analytical - Numerical experimental DURATION: 9 months andrea.manes@polimi.it sina.amiri@polimi.it University of Columbia (USA)

10 Titanium calibration TITLE: Investigation on mechanical properties of a titanium alloy in low triaxiality loading condition 1. Definition of a test programme in order to investigate in low triaxiality loading condition 2. Investigation in microstructural behaviour 3. Definition of a damage criteria METHODOLOGY: Analytical - Numerical experimental DURATION: 9 months andrea.manes@polimi.it andrea.gilioli@polimi.it Università di Cassino (IT) M.I.T. (USA)

11 Ductile damage calibration of Al6061-T6 TITLE: Calibration of a Modified Mohr-Coulomb criterion to simulate high velocity impacts 1. Implementation in the actual MMC damage subroutine of strain rate and temperature effect 2. Application of the new subroutine to numerically reproduce ballistic impact on a aluminium shaft 3. Identification of a rigorous and general methodology to quantify and compare the experimental \numerical damage on the shaft METHODOLOGY: analytical numerical experimental (exploitation acquired data) DURATION: 9 months andrea.manes@polimi.it andrea.gilioli@polimi.it M.I.T. (USA)

12 Topic: Aeronautical Structure Diagnostics TITLE: Fatigue crack monitoring on a helicopter tail boom 1. Analysis of numerical result for strain field sensitivity to crack damage. 2. Optimisation of sensor position for diagnostic performance optimisation. 3. Experimental test of fatigue crack growth on a helicopter tail boom with real-time data processing and diagnosis METHODOLOGY: numerical - experimental DURATION: 9 months claudio.sbarufatti@polimi.it AgustaWestland (Italy) Air Force Institute of Technology (Poland) Instituto Nacional de Tecnica Aeroespacial (Spain)

13 Topic: Aeronautical Structure Diagnostics TITLE: Low velocity impact monitoring system applied to composite structures with embedded sensors 1. Study on the technique for sensor network embedding. 2. Test rig design and execution of experimental activities. 3. Analysis of experimental signals and comparison with analytical models 4. Numerical modelling of experimental signals METHODOLOGY: analytical - numerical - experimental DURATION: 9 months andrea.gilioli@polimi.it claudio.sbarufatti@polimi.it Composite manufacturers

14 Topic: Aeronautical Structure Diagnostics TITLE: Structural Health Monitoring of Helicopter Harsh Landings 1. Development of different diagnostic systems for Structural Health Monitoring of Helicopter harsh landings. 2. Damage indexes formulation; 3. Sensor network design, considering sensor typology, performance, position, etc. 4. Smart algorithms design (Artificial Neural Networks, Navigation systems) METHODOLOGY: analytical numerical - experimental DURATION: 6 9 months giorgio.vallone@polimi.it claudio.sbarufatti@polimi.it AgustaWestland AleniaAermacchi Air Force Institute of Technology

15 Topic: composite structure monitoring TITLE: Monitoring of composite materials with embedded sensors 1. Detailed study of the state of art for composite material monitoring with embedded sensors. 2. Identification of the best sensor technology to be used as a function of the monitered anomaly. 3. Optimisation of sensor network 4. Experimental design and development of composite specimens with embedded sensors 5. Experimental activity and analysis of results with different signal processing methodologies. METHODOLOGY: analytical experimental DURATION: 6 9 months claudio.sbarufatti@polimi.it

16 Topic: Aeronautical Structure Prognostics TITLE: Crack propagation in presence of random loading conditions 1. Development of real-time life predictors for aeronautical structures subject to fatigue crack propagation (Aluminium alloys). 2. Insertion of retardation/acceleration effects due to overloads/under-loads. 3. Investigation of methodologies to simulate load spectra (rainflow etc.) METHODOLOGY: analytical numerical - experimental DURATION: 6 9 months matteo.corbetta@polimi.it claudio.sbarufatti@polimi.it AgustaWestland - AleniaAermacchi

17 Topic: Aeronautical Maintenance Management TITLE: Smart Algorithms for Aircraft Squadron Life Management 1. Development of simplified and complex models able to simulate the life of an Aircraft Squadron. 2. Revision and updating of already available Discrete Event Dynamic System models; 3. Design of Smart Algorithms for optimal squadron life management. METHODOLOGY: analytical numerical DURATION: 6 9 months giorgio.vallone@polimi.it claudio.sbarufatti@polimi.it AleniaAermacchi