S型折叠悬臂梁应力仿真分析
王贵强1，邵伟平1，邹显楠1，郝永平1，慈东红2
（1.沈阳理工大学 机械工程学院，辽宁 沈阳 110159；2.沈阳市沈北新区鑫兴水务有限公司 辽宁 沈阳 110121）
摘要：针对目前S型折叠悬臂梁受外载作用时在转弯处容易发生变形、失效等问题，采用有限元法对悬臂梁转弯处的受力进行分析，推导出悬臂梁在外载荷的作用下不同位置的应力值。通过S型折叠悬臂梁本身材料的屈服应力、安全系数等参数，推算出悬臂梁在转弯处的许用载荷及屈服载荷。利用ANSYS 19.0有限元分析软件对S型折叠悬臂梁进行静态仿真验证，并将仿真出的结果与理论分析的结果进行对比验证，进一步验证理论计算的正确性。结果表明，计算载荷与仿真载荷相差2.1%，在误差允许的范围之内，说明该计算方法在S型折叠悬臂梁应用中可行。
关键词：微悬臂梁；应力计算；有限元法；屈服极限；许用载荷；微机电系统
中图分类号：TM564 文献标志码：A doi：10.3969/j.issn.1006-0316.2020.08.001
文章编号：1006－0316 (2020) 08－0001－05
Stress Simulation Analysis of S-Shaped Cantilever Beam
WANG Guiqiang1，SHAO Weiping1，ZOU Xiannan1，HAO Yongping1，CI Donghong2
( 1.School of Mechanical Engineering, Shenyang Ligong University, Shenyang 110159, China;2.Shenbei New Area Xinxing Water Affairs Co., Ltd., Shenyang 110121, China )
Abstract：Aiming at solving the problem that S-shaped folding cantilever beam is prone to deformation and failure at the turn when subjected to external load, this paper uses the finite element method to analyze the force of the cantilever beam at the turning point and derive different positions of the cantilever beam under the external load stress value. The allowable load and yield load at the turning point are calculated through the yield stress and safety factor of the material of the S-shaped folding cantilever beam. The ANSYS 19.0 finite element analysis software was used to perform static simulation verification on the S-shaped folded cantilever beam, and the simulation results were compared with the theoretical analysis results to further verify the theoretical calculation. The results show that the difference between the calculated load and the simulated load is 2.1%, within the allowable range of error, which shows the feasibility of this calculation method in the application of S-shaped folding cantilever beam.
Key words：micro-cantilever beam；stress calculation；finite element method；yield limit；allowable load；MEMS
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收稿日期：2020－04－26
基金项目：国家863计划资助项目（2015A042701）
作者简介：王贵强（1993－），男，甘肃定西人，硕士研究生，主要研究方向为数字化网络化设计与制造技术，E-mail：2907697764@qq.com；邵伟平（1968－），女，四川成都人，博士，教授，主要研究方向为机械设计及理论、先进制造技术。
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