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Initiation and growth of transverse and longitudinal cracks in composite cross-ply laminates

机译：复合交叉层压板中横向和纵向裂纹的萌生和扩展

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摘要

The aim of this study is to show the influence of transverse and longitudinal cracks on the distribution of the stress field and on the stiffness loss and Poisson ratio reduction of a cross-ply laminate subjected to monotonic or fatigue tests. Two analytical models are proposed, which rely on different distributions of the stress field in the thickness direction of the laminate. These models are based on a variational approach. A second type of approach is proposed, a three-dimensional finite element study. The three models are meant to predict the evolution of mechanical properties of [0_m/90_n]_s cross-ply laminates with (m + n = 8) in order to better understand the damage evolution.
机译：这项研究的目的是显示横向和纵向裂纹对经受单调或疲劳试验的交叉层压板的应力场分布以及刚度损失和泊松比降低的影响。提出了两种分析模型，它们依赖于层压板厚度方向上应力场的不同分布。这些模型基于变分方法。提出了第二种方法，即三维有限元研究。这三个模型旨在预测[0_m / 90_n] _s具有（m + n = 8）的交叉层压材料的力学性能的演变，以便更好地了解损伤的演变。

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