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Indexed by:会议论文

Date of Publication:2005-09-20

Included Journals:EI、CPCI-S、Scopus

Volume:6042

Key Words:topology optimization; sensitivity analysis; compliant mechanism; EFG method

Abstract:From the viewpoint of reducing the local stress, prolonging the working life and improving the total performance of the mechanism, the two-material topology optimization design for the micro compliant mechanism was investigated. Taking the mechanical advantage of the mechanism as the objective function, a mathematical model was constructed and solved using the Method of Moving Asymptotes(MMA). The Element Free Galerkin (EFG) method based on the moving least squares (MLS) approximation was used as a tool for numerical analysis and the material thickness at the gauss points in the integration cells was taken as design variables, which can improve the computing precision. Aiming at the problem of discontinuity of material distribution just as checkerboard in optimization results, a sensitivity filtering technique was used so that a clearer topology image can be obtained. The effectiveness of the mechanism was verified by a numerical example for design of a micro gripper mechanism.