Understanding coupled factors that affect the modelling accuracy of typical planar compliant mechanisms

作者：Hao, Guangbo^*; Li, Haiyang; Kemalcan, Suzen; Chen, Guimin; Yu, Jingjun

来源：Frontiers of Mechanical Engineering, 2016, 11(2): 129-134.

DOI：10.1007/s11465-016-0392-z

• coupling factors
• modelling accuracy
• compliant mechanisms
• equivalent modulus

In order to accurately model compliant mechanism utilizing plate flexures, qualitative planar stress (Young's modulus) and planar strain (plate modulus) assumptions are not feasible. This paper investigates a quantitative equivalent modulus using nonlinear finite element analysis (FEA) to reflect coupled factors in affecting the modelling accuracy of two typical distributed- compliance mechanisms. It has been shown that all parameters have influences on the equivalent modulus with different degrees; that the presence of large load-stiffening effect makes the equivalent modulus significantly deviate from the planar assumptions in two ideal scenarios; and that a plate modulus assumption is more reasonable for a very large out-of-plane thickness if the beam length is large.

• 出版日期2016-6
• 单位北京航空航天大学; 西安电子科技大学