Abstract
Topology optimization has been employed for the configurational design of flexure hinges under linear assumption in recent years. This paper presents a method for the design of flexure hinges with large displacements in which the nonlinear topology optimization is adopted. An optimization model is developed based on the spring model. The objective function is formulated by minimizing the stiffness in the desired direction. A rotational index is proposed and serves as one of the constraints for accomplishing the high precision revolute requirement. A symmetry constraint is employed to improve the practicability of the optimized results. A minimal length scale control technique is adopted to avoid point flexure issue. Several numerical results are performed to demonstrate the effectiveness of the proposed method.
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Acknowledgements
This research was supported by the National Natural Science Foundation of China (Grant Nos. 51975216, 52035013), the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021B1515020053), and the Fundamental Research Funds for the Central Universities.
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Zhu, B. et al. (2021). Design of Flexure Hinges Using Geometrically Nonlinear Topology Optimization. In: Liu, XJ., Nie, Z., Yu, J., Xie, F., Song, R. (eds) Intelligent Robotics and Applications. ICIRA 2021. Lecture Notes in Computer Science(), vol 13013. Springer, Cham. https://doi.org/10.1007/978-3-030-89095-7_18
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