• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (14): 144-149.doi: 10.3901/JME.2017.14.144

• 材料科学与工程 • 上一篇    下一篇

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Mullins诱导各向异性及橡胶弹性元件多向刚度预测

丁智平1, 李飞1, 卜继玲2, 黄友剑2, 黄达勇1   

  1. 1. 湖南工业大学机械工程学院 株洲 412007;
    2. 株洲时代新材料科技股份有限公司 株洲 412007
  • 收稿日期:2016-08-14 修回日期:2016-12-17 出版日期:2017-07-20 发布日期:2017-07-20
  • 作者简介:丁智平,男,1956年出生,博士,教授,硕士研究生导师。主要研究方向为机械结构强度理论及应用。E-mail:dzp0733@sohu.com
  • 基金资助:
    中央财政创新团队专项资金资助项目(0420036017)。

Mullins Induced Anisotropy and Multi-directional Stiffness Prediction of Rubber Elastic Components

DING Zhiping1, LI Fei1, BU Jiling2, HUANG Youjian2, HUANG Dayong1   

  1. 1. School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007;
    2. Zhu Zhou Time New Material Technology Co., Ltd., Zhuzhou 412007
  • Received:2016-08-14 Revised:2016-12-17 Online:2017-07-20 Published:2017-07-20

摘要: 对橡胶材料试样进行单轴拉伸和拉/剪循环加载试验,研究其在双向载荷历程作用下的Mullins软化诱导各向异性。试验发现试样在先后不同方向载荷作用下会产生Mullins软化诱导各向异性,且随载荷逐渐增大而增大。基于伪弹性本构理论,采用最小二乘法拟合橡胶试样双向载荷历程循环加载试验数据,得出橡胶Mullins软化诱导各向异性参数。使用各向异性参数修正伪弹性本构模型软化效应控制参数,采用分步加载和网格映射方式对承受垂向压缩和横向剪切载荷的锥形橡胶弹簧承载刚度进行仿真预测,并通过锥型橡胶弹簧台架刚度试验验证,结果表明使用Mullins软化诱导各向异性参数能够显著提高橡胶弹性元件多向承载刚度预测精度。

关键词: Mullins诱导各向异性, 弹性元件, 多向刚度, 仿真, 橡胶

Abstract: By carrying out experiments of rubber specimens under uniaxial tension and tension/pure shear cyclic load, the Mullins softening induced anisotropy of rubber material is studied under biaxial load history effect. The results show that the rubber specimen will produce Mullins softening induced anisotropy in different directions under loading, and increases as the load increases. Based on the pseudo elastic constitutive theory, using least square fitting the rubber specimen's data of experiments under bidirectional cyclic load history, the Mullins softening induced anisotropic parameters are obtained. Then these anisotropic parameters are used to fix softening effect control parameters of pseudo elastic constitutive model and to simulate the stiffness of conical rubber spring with step by step load and grid map way under vertical compressive and transverse shear load by finite element analysis. By means of conical rubber spring suspension stiffness tests, the results show that Mullins softening induced anisotropy parameters can significantly improve the prediction accuracy of multi-directional stiffness of rubber elastic component.

Key words: elastic component, Mullins induced anisotropy, multi-directional stiffness, rubber, simulation

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