Mechanical Topology Optimization

General Data
Academic program	General Engineering Program			:
Type d'EC	Classes
Tutorials : 4h00 Project : 12h00 Total duration : 26h00	Status :	Period : ACADEMIC SEMESTER	Education language : French

Learning Outcomes
Optimization methods are increasingly used today. In the field of structural design, they make it possible in particular to reduce the mass of a mechanical system and therefore to reduce its production cost (less material), and possibly its cost of use (reduction in energy consumption). ). Among the different methods, topological optimization is currently experiencing strong development because of the interest it represents if it is associated with 3D printing. The objectives of this teaching are as follows: Awareness of the concept of optimization Use of topological optimization associated with 3D printing Development of the ability to work independently Development of critical thinking about numerical results

Learning Outcomes

Optimization methods are increasingly used today. In the field of structural design, they make it possible in particular to reduce the mass of a mechanical system and therefore to reduce its production cost (less material), and possibly its cost of use (reduction in energy consumption). ). Among the different methods, topological optimization is currently experiencing strong development because of the interest it represents if it is associated with 3D printing.
The objectives of this teaching are as follows:
Awareness of the concept of optimization
Use of topological optimization associated with 3D printing
Development of the ability to work independently
Development of critical thinking about numerical results

Content
The first session is devoted to the general presentation of the method followed by an example of application on the ANSYS WorkBench software. This example will illustrate the different options and the different stages of a topological optimization. The following 3 sessions will be devoted to carrying out a project in a group and independently. This project will consist of the following stages: Mechanical characterization of the material used: creation and 3D printing of test specimens which will be subjected to a tensile test. The anisotropy of the material can be highlighted and characterized. Topological optimization: search for an optimized solution for a given load case. The influence of parameters such as mesh size, boundary conditions or optimization methods should be evaluated. Numerical validation of the optimized structure (simulation on the optimized structure) 3D printing of the optimized structure and mechanical test on this part. The experimental results will be compared with the numerical results; we will then try to explain any differences.

Content

The first session is devoted to the general presentation of the method followed by an example of application on the ANSYS WorkBench software. This example will illustrate the different options and the different stages of a topological optimization.
The following 3 sessions will be devoted to carrying out a project in a group and independently. This project will consist of the following stages:
Mechanical characterization of the material used: creation and 3D printing of test specimens which will be subjected to a tensile test. The anisotropy of the material can be highlighted and characterized.
Topological optimization: search for an optimized solution for a given load case. The influence of parameters such as mesh size, boundary conditions or optimization methods should be evaluated.
Numerical validation of the optimized structure (simulation on the optimized structure)
3D printing of the optimized structure and mechanical test on this part. The experimental results will be compared with the numerical results; we will then try to explain any differences.

Pre-requisites / co-requisites
Solid Knowlegde in: * Strenght of Materials * Solid mechanics * Materials * Structural calculation

Bibliography
Optimisation des structure mécanique Méthodes numériques et éléments finis - DUNOD - M. Bruyneel, JC Craveur, P Gourmelin

Assessment(s)
N°	Nature	Coefficient	Observable objectives
1	Project	1