Modelling of Composite Materials
| Code | Completion | Credits | Range | Language |
|---|---|---|---|---|
| 132MKOM | KZ | 4 | 2P+1C | Czech |
- Course guarantor:
- Michal Šejnoha
- Lecturer:
- Michal Šejnoha
- Tutor:
- Michal Šejnoha
- Supervisor:
- Department of Mechanics
- Synopsis:
-
The course introduces the theory of homogenization which allows prediction of effective properties of heterogeneous materials by exploiting both classical micromechanics and numerical modeling of periodic structures. Grounding on the theory of elasticity the students will become familiar with the behavior of general anisotropic materials. Application of theoretical formulations is illustrated on several examples of heterogeneous structures encountered in civil as well as mechanical engineering. Such structures include wood, masonry, asphalt mixtures, fibrous composites, metal foams, etc. Determination of effective elastic (Hooke's law) will be accompanied by homogenization of parameters governing various mass transport processes assuming steady state heat flow (Fourier's law, coefficient of thermal conduction) and moisture (Fick's law, coefficient of diffusion). These basic concepts will be eventually presented in the framework of multi-scale homogenization. The students will also become familiar with the CELP software intended for a quick estimate of properties of mutli-phase material system.
- Requirements:
-
PRPE, SM3
- Syllabus of lectures:
-
1. Basic equations of linear elasticity, tensor notation, material symmetry
2. Principles of volume averaging, simplified homogenization approaches
3. Basic energy principles
4. Introduction to micromechanics - representative volume element, concentration (localization) factors
5. Eshelby tensor, transformation inclusion problem
6. Basic macromechanical models - Dilute approximation, Self-Consistent method
7. Basic macromechanical models - Mori-Tanaka method, CELP software
8. First order homogenization theory - periodic unit cell, periodic boundary conditions
9. First order homogenization theory - displacement-driven vs stress-driven loading conditions
10. Periodic boundary conditions in commercial software
11. Homogenization of transport processes
12. Application of homogenization in the solution of practical problems
13. Introduction to multi-scale modeling
- Syllabus of tutorials:
-
1. Basic equations of linear elasticity, tensor notation, material symmetry
2. Spring models
3. Unidirectional fibrous composite - drawbacks of basic rules of mixture
4. Evaluation of concentration factors - dilute approximation
5. Mori-Tanaka method - randomly distributed spherical inclusions
6. Self-consistent method - randomly distributed spherical inclusions
7. Mori-Tanaka method - unidirectional fibrous composite
8. Self-consistent method - unidirectional fibrous composite
9. Effective coefficient of thermal expansion, conductivity and diffusion
10. Review
11. First order homogenization
12. Test
13. Preparation for exam
- Study Objective:
-
The objective is to extend the basic knowledge provided by the theory of elasticity towards the analysis of heterogeneous materials. The course will introduce basic analytical and numerical micromechanical models used in the theory of homogenization thus moving beyond the application of classical rules of mixture. One of the goals is to bring the basic stiffness parameters and parameters describing the mass transport to the same footing.
- Study materials:
-
1. M. Šejnoha, J. Zeman: Micromechanics in practice, WIT Press, Southampton, Boston, 2013, ISBN 978-1-84564-682-0.
2. G.J. Dvorak: Micromechanics of Composite Materials, Springer Dordrech Heidelberg New York London, 2013, ISSN 0925-0042, ISBN 978-94-007-4100-3.
- Note:
- Time-table for winter semester 2024/2025:
-
06:00–08:0008:00–10:0010:00–12:0012:00–14:0014:00–16:0016:00–18:0018:00–20:0020:00–22:0022:00–24:00
Mon Tue Wed Thu Fri - Time-table for summer semester 2024/2025:
- Time-table is not available yet
- The course is a part of the following study plans:
-
- Stavební inženýrství - materiály a diagnostika staveb (compulsory course)