李过,孙耀宁,王国建

• 1:新疆大学机械工程学院

摘要(Abstract)：

为探究玻璃纤维增强环氧乙烯基酯树脂基复合材料(GF/EVE)在120℃高温环境下不同老化时间后的低速冲击特性,采用人工加速老化试验和低速冲击试验,基于扫描电镜(SEM)、红外测试(FTIR)和XPS表征手段研究了GF/EVE复合材料的老化机制.研究发现:树脂基体发生了热氧老化降解;高温老化造成树脂分子链的断裂,树脂交联密度降低,导致树脂初始分解温度下降;其次随老化时间增加试样冲击凹坑深度逐渐增大;同时测得了不同老化时间下不同冲击能量的冲击载荷-时间曲线,发现GF/EVE试样所承受的最大冲击载荷随老化时间的增加而下降,并且随着冲击能量的增大,同等老化条件下试样所承受的最大冲击载荷增大.

关键词(KeyWords)： 复合材料;高温环境;热稳定性;低速冲击;冲击损伤

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51465055)

作者(Author): 李过,孙耀宁,王国建

DOI: 10.13568/j.cnki.651094.651316.2020.04.29.0003

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