Modeling of Delamination Damage Evolution in Laminated Composites Subjected to Low Velocity Impact
Modeling of Delamination Damage Evolution in Laminated Composites Subjected to Low Velocity Impact
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DOI：
10.1177/105678959400300405
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发表时间：
1994-10
影响因子：
4.2
通讯作者：
D. Lo;D. Allen
中科院分区：
文献类型：
--
作者：
D. Lo;D. Allen
本研究考察了在准静态条件下，具有机械非线性富含树脂界面的层状聚合物复合材料的分层演化。界面的本构行为由Needleman[1]和Tvergaard[2]提出的两个模型表示。这些模型假定界面牵引力只是界面位移的函数，其行为类似于原子间分离过程中产生的原子间作用力。界面材料的参数控制着开始分层生长的载荷和最终的分层尺寸。通过改变模型参数，得到了大范围的损伤累积响应。这些结果表明，在预测所考察结构的损伤演化时，Tvergaard模型被发现比这两个模型更适合。
This study examines the delamination evolution, under quasi-static condi tions, of laminated polymeric composites with mechanically nonlinear resin rich inter faces. The constitutive behavior of the interface is represented by two models developed by Needleman [1] and Tvergaard [2]. These models assumed that the interfacial tractions, a function of only the interfacial displacement, will behave similarly to the interatomic forces generated during the interatomic separation. The interface material's parameters control the load at which the delamination growth initiates and the final delamination size. A wide range of damage accumulation responses have been obtained by varying the model parameters. These results show that Tvergaard's model has been found to be better suited of the two models in predicting damage evolution for the configurations examined.