Closed-loop optimization and investigation of bistable interlocked structure

• Published in: International journal of mechanical sciences 2018-08, Vol.144, p.10-23
• Main Authors: Hu, Wang, Mengzhu, Yang, Yufan, Wu
• Format: Article
• Language: English
• Subjects: Bistable interlocked structure; Closed-loop optimization; GSA; Parametric modeling
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/j.ijmecsci.2018.05.037

•The mechanical characteristics of a novel bio-inspired structure—BI was studied based on FEM simulation.•Parametric models of structures with individual and multiple bistable interlocked sutures were built by using Python Language.•GSA-HDMR for design variables of individual bistable interlocked tabs was carried out through a closed-loop approach.•Optimal designs of structure with multiple interlocked sutures were obtained by several different algorithms and a comparison of the results was also conducted. BI (bistable interlock), which exists in some creatures and is nowadays applied in engineering, is a kind of micro-structure with two distinct stable positions. In this study, the physical properties and other characteristics of the BI are investigated and the geometric parameters of the BI are optimized. Initially, to filter unimportant factors for individual interlocked structure, GSA-HDMR (global sensitivity analysis - high dimensional modeling representation) is firstly performed through a closed-loop method. An optimization of structure with multiple interlocked sutures is carried out by several novel algorithms to find the optimal design that makes the structure the most stable. The optimal design obtained by the PSO (particle swarm optimization) method turns out to be the best. To improve the modeling efficiency and make the above procedures adaptive and easy to be controlled, the GSA (global sensitivity analysis) and optimization procedures are modeled in ABAQUS based on Python Language. [Display omitted]