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| MECA0502-1 | Mechanics of composites
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| Duration : | 30h Th, 30h Pr |
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| Number of credits : |
| Master in Aerospace Engineering, research focus, 2nd year | | 5 |
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| Master in Aerospace Engineering, research focus, 2nd year | | 5 |
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| Master in Aerospace Engineering, research focus (THRUST), 2nd year | | 5 |
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| Master in Mechanical Engineering, research focus, 2nd year | | 5 |
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| Master in Engineering Physics, research focus, 2nd year | | 5 |
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| Lecturer : | Michaël Bruyneel |
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Language(s) of instruction :
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| English language |
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Organisation and examination :
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| Teaching in the first semester, review in January |
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Course contents :
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| The course introduces different aspects of fibre-reinforced plastic materials :
- overall description : constituents, matrix and fiber architecture, industrial applications (aerospace, automotive, energy), links between process, microstructure, material properties and structural performance.
- mechanical properties : linear elasticity of orthotropic (and anisotropic) materials, classical laminate theory (CLT), progressive damage and failure mechanisms, edge effects, humidity and temperature effects.
- homogenization : principles, mean-field homogenization applied to linear elasticity, extension to elastoplasticity, applications to short and continuous fibre-reinforced plastics.
- numerical simulation : linear and nonlinear finite element analysis (buckling, post-buckling, collapse, nonlinear material).
- design of composite structures : design rules and manufacturing constraints, parameterizations and optimization algorithms, stacking sequence optimization. |
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Learning outcomes of the course :
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| At the end of the course, students should have acquired the following knowledge and skills :
- an overview of the different kinds of composites and their constituents;
- linear and nonlinear mechanical characteristics of continuous fiber laminates, including damage and failure mechanisms ;
- homogenization techniques and basis multi-scale material modeling ;
- Integrated Computational Mechanical/Material Engineering (ICME): Integration of process, material and structural modeling.
- the classical laminate theory ;
- main design rules and stacking sequence optimization of composite laminates;
- a theoretical knowledge of manufacturing process and related constraints;
- the ability to analyse a composite structure with industrial finite element software. |
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Prerequisites and co-requisites/ Recommended optional programme components :
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| A background in continuum mechanics and finite element methods is required. |
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Planned learning activities and teaching methods :
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| Theoretical concepts are explained during formal lectures and seminars. All speakers have a strong industrial background and share their practical experience with students. Exercise sessions are meant to put the classical laminate theory into practice (analysis of continuous fiber laminate properties with analytically calculated ABD matrices). Students have individual graded projects involving SAMCEF finite element software and Digimat, which are introduced during computer sessions. |
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Mode of delivery (face-to-face ; distance-learning) :
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| Theoretical lectures are taught in class by the professor. Exercise sessions are led by the assistants. Mandatory practical sessions are organized in a computer room where numerical simulation tools are available. |
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Recommended or required readings :
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| References :
Lecture notes (contact M. Bruyneel)
Strength and life of composites, S.W. Tsai, ed. JEC Composites Publication: homogenization, orthotropy, CLT, failure theories.
Matériaux composites, D. Gay, ed. Hermes, Paris, 2005: homogenization, orthotropy, CLT, failure theories, lots of applications.
Composite airframe structures, M.C.Y. Niu, ed. Conmilit Press LTd. Hong Kong, 1992: testing, manufacturing, applications.
Optimisation des structures mécaniques: méthodes numériques et éléments finis, M. Bruyneel, J.C. Craveur, P. Gourmelen, ed. Dunod, Paris, 2014 : composite materials |
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Assessment methods and criteria :
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| Written exam, theory (closed-book): 50% of the total points
Written exam, exercises (open book): 25% of the total points
Practical work on computer reports: 25% of the total points
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Work placement(s) :
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Organizational remarks :
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Contacts :
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| Michaël Bruyneel (Michael.Bruyneel@lmsintl.com)
Geoffrey Deliège (geoffrey.deliege@ulg.ac.be)(geoffrey.deliege@ulg.ac.be) |
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