Title: Multi-objective topology optimization of design compliant mechanisms based on global strain
Abstract: To overcome the disadvantages of the traditional topology optimization method,aglobal effective strain based multi-objective topology optimization method of compliant mechanisms was presented.Under this method,aglobal effective strain function was minimized to represent structural rigidity,rather than minimizing the strain energy as the objective function.Thus the strain could be well distributed within the whole mechanism,instead of concentrating on compliant joints to cause a localized high strain.Considering the requirement of rigidity and flexibility on compliant mechanism,the multi-objective topology optimization problem that defined the objective as minimizing the global effective strain and maximizing mutual strain energy was established.Based on the solid isotropic material with penalization approach,the compromise programming method was used to study the multi-objective optimization problem of compliant mechanisms.The sensitivity of the objective functions was analyzed by the adjoint metrix method.The multi-objective topology optimization problem was solved using the algorithm of moving asymptotes.Finally,this method was further investigated and realized with a numerical example to show its correctness and effectiveness.The results show that the global effective strain based topology optimization method can effectively reduce localized high strain of the traditional method to improve the reliability of the compliant mechanism.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot