粘弹性材料剪切模量松弛函数的拟合研究  

Fitting Research on the Relaxation Function of Shear Modulus for Viscoelastic Materials

作　　者：卫延斌[1] 史仪凯[1] 刘澎[1] 

机构地区：[1]西北工业大学机电工程学院,陕西西安710072

出　　处：《兵工学报》2010年第10期1409-1412,共4页Acta Armamentarii

基　　金：西北工业大学科技创新基金项目(2007KJ01025)

摘　　要：粘弹性材料进行有限元分析时,须有其粘弹性物理模型特征参数。采用数值拟合法,对粘弹材料肋软骨,推导了模型简化下归一化实验曲线与广义Maxwell模型的关系,实现了实验曲线与广义Maxwell模型的拟合,得到了肋软骨材料用于粘弹性有限元分析的Maxwell模型参数。仿真验证表明曲线的拟合度很高。The characteristic parameters of viscoelastic physical model must be provided for the finite element analysis of viscoelastic materials.A numerical fitting method was used to derive the relationship of the generalized Maxwell model and the normalized experimental curve in terms of a model simplified for the viscoelastic material-costal cartilage,realize the fitting of experimental curve with the generalized Maxwell model,and receive the Maxwell model parameters of costal cartilage for viscoelastic finite element analysis.The simulation shows that the curve fitting degree is high.

关 键 词：固体力学 粘弹性 Maxwell模型 剪切模量松弛函数 参数拟合 有限元 

分 类 号：O345[理学—固体力学]