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Numerical modeling of delamination growth in composite plates

机译:复合板中分层生长的数值模拟

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The paper presents growth of embedded circular delamination in a thin laminate plate subjected to compressive loading. The following reinforcement combinations were considered: [0°//0°/0°], [0°//90°/0°] and [45°/-45°/-45°/45°//90°/45°/-45°/-45°/45°], where symbol//denotes the location of the delamination. The delamination growth was modeled with the use of MSC.MARC finite element commercial code. Two different modeling methods were used: a method based on the Virtual Crack Closure Technique (VCCT) and a method utilizing cohesive elements. In both methods the same regular mesh of 3D 8 node cuboidal elements was used to model the composite structure. It was found that both methods produced similar qualitative results with regard to the delamination geometry changes during loading. However, the method based on the VCCT produced more conservative results regarding the gradient of delamination growth.
机译:本文介绍了在经过压缩载荷的薄层压板中嵌入圆分层的生长。考虑以下加强组合:[0°// 0°/ 0°],[0°// 90°/ 0°]和[45°/ -45°/ -45°/ 45°// 90°/ 45°/ -45°/ -45°/ 45°],其中符号//表示分层的位置。利用MSC.MARC有限元商业代码建模分层增长。使用了两种不同的建模方法:一种基于虚拟裂纹闭合技术(VCCT)的方法和利用粘性元件的方法。在两种方法中,使用相同的3D 8节点立方体元件的常规网格来模拟复合结构。发现两种方法在装载期间的分层几何变化方面产生了类似的定性结果。然而,基于VCCT的方法产生了更多保守的结果,了解分层生长的梯度。

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