Structure Design and Deflection Analysis of the New Large Deflection Lamina Emergent Joints

Liu Qingling

doi:10.16578/j.issn.1004.2539.2022.12.023

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Structure Design and Deflection Analysis of the New Large Deflection Lamina Emergent Joints

Development·Application | 更新时间：2023-01-06

- Structure Design and Deflection Analysis of the New Large Deflection Lamina Emergent Joints
- Journal of Mechanical Transmission Vol. 46, Issue 12, Pages: 148-154(2022)
- 作者机构：
  
  1.廊坊师范学院电子信息工程学院，河北廊坊 065000
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2022.12.023
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刘庆玲.新型大变形LEJ铰链的结构设计与变形分析[J].机械传动,2022,46(12):148-154.

Liu Qingling.Structure Design and Deflection Analysis of the New Large Deflection Lamina Emergent Joints[J].Journal of Mechanical Transmission,2022,46(12):148-154.
刘庆玲.新型大变形LEJ铰链的结构设计与变形分析[J].机械传动,2022,46(12):148-154. DOI： 10.16578/j.issn.1004.2539.2022.12.023.

Liu Qingling.Structure Design and Deflection Analysis of the New Large Deflection Lamina Emergent Joints[J].Journal of Mechanical Transmission,2022,46(12):148-154. DOI： 10.16578/j.issn.1004.2539.2022.12.023.

摘要

采用柔性片段外侧串联布置，同时考虑倒置设计原则，设计了两种大变形平面折展铰链，分别命名为OSD-LEJ（Outside-series-deployed lamina emergent joint）与IOSD-LEJ（Inverted-outside-series-deployed lamina emergent joint）。设计了铰链的结构，推导了铰链的弯曲等效刚度计算式。设计两种铰链实例，分别进行弯曲变形的理论计算与有限元仿真，并计算两种结果之间的误差，误差结果分别在4%与4.2%左右，验证了弯曲等效刚度计算式的正确性。对具有相同特征尺寸的OSD-LEJ、IOSD-LEJ与文献中的大变形铰链OD-LEJ进行性能对比分析，结果显示，OSD-LEJ与IOSD-LEJ的弯曲变形分别提升到OD-LEJ的1.2倍与1.31倍，拉伸变形仅是OD-LEJ的1.16倍与1.18倍，铰链的综合性能得到了提升。验证了铰链结构设计的有效性与合理性，为大变形铰链LEJ的结构设计提供了思路与参考。

Abstract

Two kinds of large deflection plane folding hinges, named OSD-LEJ (outside-series-deployed lamina emergent joint) and IOSD-LEJ (inverted-outside-series-deployed lamina emergent joint), are designed with flexible segments arranged in series on the outside, taking into account the inverted design principle. The structures of the two LEJs are designed, and the bending equivalent stiffness formulas are derived. Through the theoretical calculation and the finite element simulation analysis of OSD-LEJ and IOSD-LEJ, the errors between them are about 4% and 4.2% respectively. The correctness of the bending equivalent stiffness formulas is verified. The performances of OSD-LEJ, IOSD-LEJ and large deformation OD-LEJ in the literature with the same feature size are compared and analyzed. The results show that the bending deflections of OSD-LEJ and IOSD-LEJ are 1.2 times and 1.31 times those of the OD-LEJ respectively and the tensile deflections of OSD-LEJ and IOSD-LEJ are 1.16 times and 1.18 times those of the OD-LEJ respectively. Therefore, the OSD-LEJ and IOSD-LEJ have better comprehensive performance. The validity and rationality of structure design of the joints are verified; the idea and reference for the structure design of large deformation hinge LEJ are provided.

关键词

平面折展铰链结构设计弯曲等效刚度变形分析

Keywords

Lamina emergent jointStructure designBending equivalent stiffnessDeflection analysis

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