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Predicting the tensile and compressive failure behavior of angle-ply spread tow woven composites

机译：预测角层铺展的丝束编织复合材料的拉伸和压缩破坏行为

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摘要

A meso-scale finite element model is developed to study the progressive failure behavior of angle-ply spread tow woven composites under tensile and compressive loading conditions. The size of representative volume element (RVE) for angle-ply woven composites is determined by comparing the model predictions against tensile and compressive experimental results to identify the RVE size that significantly affects the prediction of deformation and failure modes, due to inconsistencies in the periodic geometric features of the 0/90 degrees layer and the +/- 45 degrees layer. The validated model is shown to be capable of predicting the effective stiffness, strength and main failure behavior of the woven composite under tension and compression loading. The tensile and compressive failure behavior of spread tow woven composites are systemically investigated based on the numerically predicted stress distribution and damage contours. It was found that the presence of 45 degrees angle-ply could enhance the crack propagation resistance of the woven composite. This study provides a detailed understanding of the failure mechanism and modeling strategy for spread tow woven composites.
机译：建立了介观的有限元模型，以研究在拉伸和压缩载荷条件下，角层铺展的丝束编织复合材料的渐进破坏行为。通过将模型预测值与拉伸和压缩实验结果进行比较，以确定由于周期性的不一致而显着影响变形和破坏模式预测的RVE大小，可以确定角层编织复合材料的代表性体积元（RVE）的大小。 0/90度图层和+/- 45度图层的几何特征。经验证的模型显示出能够预测拉伸和压缩载荷下机织复合材料的有效刚度，强度和主要破坏行为。基于数值预测的应力分布和损伤轮廓，系统地研究了铺展丝束复合材料的拉伸和压缩破坏行为。发现45度角层的存在可以增强编织复合材料的抗裂纹扩展性。这项研究对铺展丝束复合材料的破坏机理和建模策略提供了详细的了解。

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