层合板在低速冲击载荷作用下本构方程的研究

纤维增强复合材料层合板的冲击响应是一个兼有几何非线性、材料非线性、接触非线性的复杂过程。本文采用连续介质力学,对层合板的运动、变形进行描述,给出了冲击系统的有限元列式。在此基础上,通过建立壳局部坐标系与参考坐标系之间的转换矩阵,导出有限应变低阶壳单元在显式分析中的应力更新方法,为进一步研究复合材料的动态力学行为提供一个新思路。

Study on the Constitutive Model of Laminates Under Impact Load

The impact response of fiber reinforced composite laminate is a complex procedure with geometric nonlinearity,material nonlinearity and contact nonlinearity.The continuum media mechanics was used to describe the motion and deformation of laminate,and the finite element determinant of impact system was given.Then the transform matrix between shell local coordinate system and the reference coordinate system was built,and the updating stress method of low-order shell element in explicit analysis was presented,...