基于温度的隔膜超弹性本构模型

doi:10.16183/j.cnki.jsjtu.2017.09.001

摘要/Abstract

摘要： 为获得复合材料热隔膜预成型中隔膜的基本力学性能参数，在不同温度下进行了隔膜材料的单向拉伸实验；基于连续介质力学超弹性理论和虚功原理，建立了描述隔膜材料在90℃以下的不同温度及大变形条件下的本构模型，并通过Abaqus软件的材料子程序UHYPER来实现；通过拟合实验数据获得材料模型参数并分析了模型的稳定性；采用有限元法分别对隔膜单向拉伸性能和隔膜覆盖进行模拟.结果表明:仿真结果与实验结果较吻合，从而验证了所提出的隔膜本构模型的准确性.

关键词: 热隔膜成型, 隔膜, 超弹性本构模型, 温度, 复合材料

Abstract: Uniaxial tensile tests under different temperatures were implemented to obtain the basic mechanical property of diaphragm in hot diaphragm preforming of composites. Based on the hyperelastic theory of continuum mechanics and the principle of virtual work, a constitutive model which considered the influence of the temperature under 90℃ was developed to characterize the large deformation behavior of diaphragm. Material parameters were attained by fitting experimental data. The stability of the model was analyzed and then the constitutive model was implemented in Abaqus through the user material subroutine UHYPER. The developed constitutive model was applied to simulate uniaxial tensile and draping of diaphragm over mold. Numerical results were compared with experimental data as a means of model validation. The results show that the simulation results are in good agreement with the experimental results, which verifies the accuracy of the proposed constitutive model.

Key words: hot diaphragm forming, diaphragm, hyperelastic constitutive model, temperature, composites

中图分类号:

TB 125

王立冬1，魏冉2,徐鹏2,赵科新2,彭雄奇1. 基于温度的隔膜超弹性本构模型[J]. 上海交通大学学报（自然版）, 2017, 51(9): 1025-1030.

WANG Lidong1,WEI Ran2,XU Peng2,ZHAO Kexin2,PENG Xiongqi1. A TemperatureDependent Hyperelastic Constitutive[J]. Journal of Shanghai Jiaotong University, 2017, 51(9): 1025-1030.

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