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Damage Development in a Noncrimp-Glass Fabric Reinforced Epoxy Composite Material

机译：非卷曲玻璃纤维增​​强环氧树脂复合材料的损伤发展

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摘要

The relationship between textile architecture and the damage sequence under tensile loading has been investigated experimentally for a composite material reinforced with a noncrimp glass-fiber textile of configuration [0°, +45°, 90°, -45°] stacking sequence based on epoxy resin matrix cured with high-temperature hardener. The system chosen for this work consists of a bifunctional epoxy, diglycidyl ether of bisphenol A, cured with a tetrafunctional amine, diaminodiphenyl sulfone (DDS). This system ensures to obtain a rigid material with excellent mechanical properties in order to observe, analyze, and identify the process and progress of the generated damage and the failure mechanism which leads to the materials fracture. The properties have been studied for each ply direction at 0°, +45°, 90°, and -45° in order to make a comparative assessment of the influence of the polyester (PES) yarns in zig-zag and unidirectional geometry, that hold together the four plies in the textile, in the composite damage generation. The laminates were uniaxially tensile loaded until final fracture occurred. It was found that PES threads have an effect on cracking progression depending on the textile orientation.
机译：已对基于环氧树脂的堆叠顺序为[0°，+ 45°，90°，-45°]的无卷曲玻璃纤维织物增强的复合材料进行了实验研究，研究了织物结构与拉伸载荷下破坏顺序之间的关系。用高温硬化剂固化的树脂基体。用于这项工作的系统由双酚A的双官能环氧双缩水甘油醚组成，并用四官能胺二氨基二苯砜（DDS）固化。该系统可确保获得具有优异机械性能的硬质材料，以便观察，分析和识别导致损坏的过程和进程以及导致材料破裂的破坏机理。已针对0°，+ 45°，90°和-45°的每个层方向研究了性能，以便比较评估聚酯（PES）纱在之字形和单向几何形状中的影响，即将纺织品中的四层结合在一起，从而产生复合损伤。层压件被单轴拉伸加载直到发生最终断裂。已经发现，PES线根据织物取向对开裂进程有影响。

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