SMA增强复合材料梁的低速冲击响应分析  

Response of SMA reinforced composite beam to low velocity impact

作　　者：吴永东[1] 钟伟芳[1] 邹静[1] 吴国荣[1] 

机构地区：[1]华中科技大学土木工程与力学学院

出　　处：《华中科技大学学报（自然科学版）》2002年第11期77-78,共2页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：教育部科学技术研究重点项目 (0 0 0 85 )

摘　　要：以形状记忆合金纤维增强复合材料梁为研究对象 ,应用有限元法对其低速冲击响应进行了分析 .采用Newmark直接积分法求解有限元动力方程 ,并考虑了形状记忆合金对刚度矩阵的影响 ;同时 ,利用Hertzian接触定律确定冲击接触力 ;分析结果表明形状记忆合金能有效地改善复合材料梁的低速冲击响应性能 ,它的最大位移与最大压应力都有明显减少 .The low velocity impact response of the shape memory alloy reinforced composite beam was analyzed by means of the finite element method. The Newmark direct integration method was used to solve the finite element dynamic equation and the influence of shape memory alloy to the stiffness matrix considered. The impact contact force was determined by using the Hertzian contact law. The numerical results show that the shape memory alloy can improve the low velocity impact response performance of composite material beam, and its maximum displacement and compressive stress can be decreased obviously in comparison with the composite beam without shape memory alloys.

关 键 词：SMA增强复合材料梁 低速冲击响应 形状记忆合金 有限元法 冲击接触力 本构关系 

分 类 号：TB331[一般工业技术—材料科学与工程]