About the influence of temperature and matrix ductility on the behavior of carbon woven-ply PPS or epoxy laminates: Notched and unnotched laminates
About the influence of temperature and matrix ductility on the behavior of carbon woven-ply PPS or epoxy laminates: Notched and unnotched laminates
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DOI：
10.1016/j.compscitech.2011.03.006
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发表时间：
2011-05
影响因子：
9.1
通讯作者：
B. Vieille;L. Taleb
中科院分区：
文献类型：
--
作者：
B. Vieille;L. Taleb
热塑性基复合材料能否用来取代飞机高温次结构中的热固性基复合材料？这项工作的目的是建立一种材料系统的能力，用于飞机发动机短舱时，受到静态载荷，与关键的上限温度为120 °C。为了回答这一问题，本文对碳纤维织物增强PPS和环氧树脂层压板在120 °C温度变化范围内的热机械性能进行了比较。层合板的温度依赖性延展行为或多或少加剧，这取决于聚合物玻璃化转变温度和层合板堆叠顺序。对于这两种材料，拉伸力学性能的保留程度是相当高的缺口和无缺口准各向同性层压板。数字图像相关技术已被用来了解温度和基体延性的影响机制上的过应力的住宿附近的孔。在织物增强层压板，高温的结果表明，之间的竞争机制的损害，塑化机制，加强角铺设铺层。因此，在高于其Tg的温度下，TP基层合板的高延展性行为对于适应孔附近的过应力非常有效。
Could thermoplastic-based composites be used to replace thermosetting-based composites in high-temperature secondary aircraft structures? The purpose of this work is to establish the ability of a material system to be used in aircraft engine nacelles when subjected to static loadings, with a key upper temperature of 120 °C. In order to provide answers to this question, the thermo-mechanical behaviors of carbon fiber fabric reinforced PPS or epoxy laminates have been compared specifically within the temperature change with 120 °C at the upper bound. The temperature-dependent ductile behavior of laminates is more or less exacerbated, depending on polymers glass transition temperature, and laminates stacking sequence. For both materials, the degree of retention of tensile mechanical properties is quite high in notched and unnotched quasi-isotropic laminates. A Digital Image Correlation technique has been used in order to understand the influence of temperature and matrix ductility on the mechanisms of overstresses accommodation near the hole. In fabric reinforced laminates, the high-temperature results suggest a competition between the mechanisms of damage, and the mechanism of plasticization, enhanced in angle–ply lay-ups. Thus, the highly ductile behavior of TP-based laminates, at temperatures higher than theirTg, is very effective to accommodate the overstresses near the hole.