树脂基复合材料高温老化后低速冲击行为  

Low Velocity Impact Behaviors of Resin Matrix Composites After High-Temperature Aging

作　　者：李过 孙耀宁[1] 王国建[1] LI Guo;SUN Yaoning;WANG Guojian(School of Mechanical Engineering,Xinjiang University,Urumqi Xinjiang 830047,China)

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830047

出　　处：《新疆大学学报（自然科学版）（中英文）》2021年第4期499-506,共8页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：国家自然科学基金(51465055).

摘　　要：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.To explore the low velocity impact characteristics of glass fiber-reinforced epoxy vinyl ester resin matrix composites(GF/EVE)after aging at 120℃high temperature for different times,artificial accelerated aging test and low velocity impact test were used based on scanning electron microscope(SEM),Infrared testing(FTIR)and XPS characterization methods to study the aging mechanism of GF/EVE composites.The study found that the resin matrix has undergone thermal oxygen aging degradation;high temperature aging causes the breakage of the resin molecular chain,and the resin crosslinking density decreases,resulting in a decrease in the initial decomposition temperature of the resin;secondly,as the aging time increases,the depth of the sample impact pit gradually increases;the impact load-time curves of different impact energies were measured under different aging times.It was found that the maximum impact load experienced by the GF/EVE sample decreased with the increase of the aging time,and as the impact energy increased,the test under the same aging conditions the maximum impact load on the sample increases.

关 键 词：复合材料 高温环境 热稳定性 低速冲击 冲击损伤 

分 类 号：TB332[一般工业技术—材料科学与工程]