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.
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Hao, G., Li, H., Kemalcan, S. et al. Understanding coupled factors that affect the modelling accuracy of typical planar compliant mechanisms. Front. Mech. Eng. 11, 129–134 (2016). https://doi.org/10.1007/s11465-016-0392-z
- coupling factors
- modelling accuracy
- compliant mechanisms
- equivalent modulus