4/11/2023 0 Comments Flexture jointThe second factor represents the changing angular stiffness of the torsional spring. Hence, accurate prediction of deflection and deflection angle can be obtained. This factor resides in the relationship between the deflection and deflection angle. It is derived based on first principle classical Bernoulli–Euler’s law, to determine the nonlinearity during large deflection. The first factor represents the parasitic shifting of the ‘pivot’ joint of a beam-based flexure joint during large deflection. The accuracy and robustness of the proposed model is ensured by considering two crucial factors while adopting the principle of using a torsional spring to represent the stiffness of a beam-based flexure joint. The semi-analytic model is a simple and generic solution for approximating the large nonlinear deflection of any beam-based flexure configuration, i.e., a beam-based flexure coupled with a rigid-link. 1: Different joint configurations and the different types of models. Hence, the design process becomes very difficult especially when accurate prediction of deflection and stiffness analysis is required.įig. 1), re-modeling is required whenever there is a cross-over between different configurations. As different flexure joint configuration need different modeling approaches (Fig. Due to the specific tasks and limitations, each mechanism or module need to adopt a specific configuration to meet those requirements. Refering to Fig.1, flexure-based mechanisms and joint modules come in different forms of flexure joint configurations. Hence, let’s generalize each limb as a flexure joint coupled with a rigid-link, termed a flexure joint configuration. These limbs connect the fixed base and the moving components. Semi-analytic modeling – A generic model for accurate prediction of nonlinear deflection of beam-based flexure jointsĪ flexure-based mechanism is constructed based on flexure joints and rigid-links that form the limbs.
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