%0 Journal Article
%T 疲劳载荷下复合材料分层损伤扩展的数值模拟方法<br>Numerical Simulation Method of Delamination in Laminated Composite under Fatigue Loading
%A 朱杰
%A 薛璞
%A 李国琛
%J 机械科学与技术
%D 2015
%X 为了研究复合材料层合结构在疲劳载荷下的分层扩展行为，开发了复合材料层间疲劳损伤数值计算模型。定义层间材料模型包括层间材料本构关系、损伤判据以及疲劳损伤演化法则。疲劳损伤通过定义内聚力单元损伤变量的演化规律来表示。通过有限元商用软件，考虑到疲劳问题的特点，运用加速算法和疲劳载荷等效原理，并结合自定义材料子程序实现了疲劳损伤的模拟。最后，运用该模型模拟了层状复合材料双悬臂梁的疲劳分层扩展，并将数值模拟结果与实验数据对比，表明该模型在模拟层间裂纹的形成和扩展的有效性。<br>A numerical model for investigating the delamination behavior of laminated composite under fatigue loading is proposed. The model mainly includes three parts, i.e. the constitutive model, a damage criterion and a fatigue evolution law. The propagation of delamination is described with defining the evolution of the damage parameter of the cohesive element. An User Material Subroutine (UMAT) with commercialized finite element software ABAQUS is implemented in the model. Through a cycle jump strategy and an envelope loading curve method, the fatigue delamination propagation of a Double Cantilever Beam(DCB) test is simulated. The numerical simulation data is in a good agreement with the experiment data, and it is verified that the model is capable of simulating fatigue delamination behavior of laminated composite
%K 复合材料
%K 疲劳
%K 分层
%K 有限元&lt
%K br&gt
%K constifutive damage model
%K delamination
%K fatigue
%K finite element method
%K composite laminates
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6188.shtml