Computation and analysis of the three models of flexure hinge

As the flexure hinge,which is the key component for transmits displacement,given by piezoelectric ceramic in Micro-displacement table,it's crucial to analyze the performance of the flexure hinge.In this paper,the impact on rotational stiffness of the flexure hinge by the structure dimension parameters as straight arc radius,the thickness of the hinge structure was mainly studied,and the difference among three different models was analyzed.At the same time,single flexure hinge was analyzed,and the result and the difference among the three different models can be obtained by ANSYS11.0.The conclusion can be achieved from above analysis: when the ratio of the hinge radius to the minimum hinge thickness of the straight arc flexure hinges is t/R∈(0,0.8),the stiffness of flexure hinge can be easily calculated by using Paros and Weisbord simplified models(PW simplified model).This method has an important significance for actual designing of the flexure hinge.