Mechanics & Industry
Volume 21, Number 3, 2020
|Number of page(s)||17|
|Published online||07 April 2020|
Stress-based topology optimization of compliant mechanisms using nonlinear mechanics
10 Avenue Edouard Belin,
2 Univ Toulouse, ISAE Supaero-INSA-Mines Albi-UPS, CNRS UMR5312, Institut Clément Ader, Toulouse, France
3 Airbus Operations SAS, 316 Route de Bayonn, 31300 Toulouse, France
* e-mail: firstname.lastname@example.org
Accepted: 29 January 2020
The present work demonstrates how a light structure can be easily designed through Topology Optimization even including complex analysis and sizing criteria such as hyperelastic Neo-Hookean materials for nonlinear analysis and aggregated stress constraints. The SIMP approach was adopted and two different strategies were analysed using an in house versatile MATLAB code. MMA was used as reference optimizer (in structural optimization) whereas a unified aggregation and relaxation method was adopted to deal with stress constraints. Feasibility was analyzed from the viewpoint of allowable stress verification. Two test cases are then studied: a morphing airfoil (for aeronautical applications) and a geometric inverter (for mechanics and bio-medical applications). For both, a hyperelastic Neo-Hookean material was chosen. Finally a complementary study on the effects of constraints and the input force intensity is also presented.
Key words: Topology optimization / Nonlinear mechanics / Stress-based optimization / Morphing / Compliant mechanism
© G. Capasso et al., published by EDP Sciences 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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