Modeling and analysis for compliant mechanisms with nonlinear large deformation components

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (11) : 110-115.

LI Pengfei, CAO Boyu, WANG Zhenyu, ZHAO Chen, WANG Lipeng

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Abstract

Geometrical nonlinear large deformations of flexible components caused by large scale motion of compliant mechanisms make it be difficult to model and analyze a compliant mechanism. Here, basic principles of the elliptic integral method (EIM) and the absolute nodal coordinate formulation (ANCF) were introduced, and two mechanical models of a compliant mechanism were established using EIM and ANCF, respectively to get variation laws of deformation and driving force of flexible components in motion process of the compliant mechanism. A fix-guided compliant mechanism was taken as an example, its simulation and test results verified the effectiveness of the above two methods. A dual-stable state compliant mechanism was taken as an example, and its simulation results verified the effectiveness of ANCF for dynamic characteristics analysis of complex compliant mechanisms. Through comparing modeling and analysis processes of the above two methods, it was shown that ANCF is more suitable for modeling and analysis of compliant mechanisms.

Key words

Compliant mechanism / Nonlinear larger deformation / ANCF / EIM

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LI Pengfei, CAO Boyu, WANG Zhenyu, ZHAO Chen, WANG Lipeng. Modeling and analysis for compliant mechanisms with nonlinear large deformation components[J]. Journal of Vibration and Shock, 2019, 38(11): 110-115

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