基于拉力带参数的IST-LEJ设计与分析

doi:10.3901/JME.2018.13.094

机械工程学报 ›› 2018, Vol. 54 ›› Issue (13): 94-101.doi: 10.3901/JME.2018.13.094

• 特邀专栏：柔性机构及机器人 • 上一篇下一篇

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基于拉力带参数的IST-LEJ设计与分析

邱丽芳, 王晶琳, 刘宁宁

北京科技大学机械工程学院北京 100083

收稿日期:2017-07-02 修回日期:2017-11-09 出版日期:2018-07-05 发布日期:2018-07-05
通讯作者: 邱丽芳(通信作者),女,1966年出生,博士,教授,博士研究生导师。主要研究方向为机械设计及理论、柔性机构。E-mail:qlf@ustb.edu.cn
作者简介:王晶琳,女,1991年出生,硕士研究生。主要研究方向为柔性机构。E-mail:wjl_by@126.com
基金资助:
国家自然科学基金资助项目（51475037）。

Design and Analysis of IST-LEJ Based on Tension Band Parameters

QIU Lifang, WANG Jinglin, LIU Ningning

School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083

Received:2017-07-02 Revised:2017-11-09 Online:2018-07-05 Published:2018-07-05

摘要/Abstract

摘要： 提出了一种新型结构柔性铰链，命名为平面折展抗拉压倒置扭转铰链（Inverted stripe-type torsional lamina emergent joint，IST-LEJ），设计了该铰链的结构形式，推导了其弯曲等效刚度计算公式，提出了基于拉力带特征参数的修正系数。通过实例的理论计算和有限元仿真分析，验证了基于修正系数的弯曲等效刚度公式的正确性。通过不同拉力带尺寸的实例计算，进一步验证了等效刚度理论公式的正确性和修正系数的有效性。建立了与IST-LEJ设计实例外形尺寸和特征参数相同的平面折展倒置扭转铰链（Inverted torsional lamina emergent joint，IT-LEJ）铰链的有限元模型，比较了IST-LEJ与IT-LEJ铰链的弯曲性能和抗拉压性能。最后，对聚丙烯和铍青铜材料的这两种铰链进行了失效分析，得出了不同材料铰链各自的弯曲变形范围。

关键词: 柔性铰链, 失效分析, 弯曲等效刚度, 有限元

Abstract: A new type of flexure hinge, named inverted stripe-type torsional lamina emergent joint (IST-LEJ), is proposed. The structural form of the hinge is designed, and its bending equivalent stiffness is deduced. The correction coefficient based on characteristic parameters of the tension band is put forward. Through the theoretical calculation and the finite element simulation analysis, the correctness of the bending equivalent stiffness formula based on the modified coefficient is verified. The correctness of the theoretical formula of equivalent stiffness and the validity of the correction coefficient are further verified by the examples of different tension band sizes. A finite element model of IT-LEJ with the same dimensions and characteristic parameters of IST-LEJ design example is established, and the bending and tensile resistant properties of IST-LEJ and IT-LEJ are compared. Finally, the failure analysis of the two hinges of polypropylene and beryllium bronze is carried out, and the bending deformation range of hinges with different materials is obtained.

Key words: bending equivalent stiffness, failure analysis, finite element, flexure hinge

中图分类号:

TH122

邱丽芳, 王晶琳, 刘宁宁. 基于拉力带参数的IST-LEJ设计与分析[J]. 机械工程学报, 2018, 54(13): 94-101.

QIU Lifang, WANG Jinglin, LIU Ningning. Design and Analysis of IST-LEJ Based on Tension Band Parameters[J]. Journal of Mechanical Engineering, 2018, 54(13): 94-101.

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基于拉力带参数的IST-LEJ设计与分析

Design and Analysis of IST-LEJ Based on Tension Band Parameters

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