Computational Models for Analyzing Compliant Mechanisms: Software Development with Experiments

• Main Authors: Jian-Hao Liou, 劉建濠
• Other Authors: Chao-Chieh Lan
• Format: Others
• Language: en_US
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/95238837297612706862

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 97 === The development of an analyzing tool for compliant mechanisms is presented in this thesis. The monolithic compliant mechanisms which are different from rigid body mechanisms have no friction/backlash and are capable of miniaturization, hence rigid body mechanisms can be replaced by compliant mechanisms in many applications. Since the analysis of compliant mechanism is much complicated, we develop a simple analysis tool equipped with graphical user interface which can be used for compliant mechanisms widely and efficiently. There are three types of analyses. Static toolbox is used for static analysis, users employ it to design and analyze the prototypes of compliant mechanisms. Dynamic toolbox is used for dynamic analysis of compliant mechanisms which consist of cantilever beam, double pendulum, slider crank mechanism and four-bar mechanism. And Snap-fit toolbox is used to solve the contact problem with different geometries of snap-fit. We develop the above analysis models of compliant mechanisms based on energy method. For the static and dynamic analyses, we perform experiments for validations and compare the simulations with commercial software for efficiency of calculations. For the contact model, we use the principle of minimum potential energy and sequential quadratic programming (SQP) to obtain the deformed shape and contact force of snap-fit. We further perform an experiment to measure the contact force of snap-fit assembly for validation. We expect this analysis tool can offer efficient and accurate analyses while users use this tool to design compliant mechanisms.