GMT-PP复合材料的界面粘结状况与动态疲劳关系研究  

RELATIONSHIPS BETWEEN INTERFACIAL ADHESION AND DYNAMIC FATIGUE OF GMT-PP

作　　者：余剑英[1] 周祖福[2] 晏石林[3] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室 [2]武汉理工大学材料科学与工程学院,武汉430070 [3]武汉理工大学工程力学系,武汉430070

出　　处：《复合材料学报》2001年第2期32-36,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金资助项目!(19972 0 49);湖北省自然科学基金资助项目!(99J0 73)

摘　　要：采用动态疲劳试验研究了不同界面粘结状况的 GMT- PP复合材料的疲劳行为。结果表明 :GMT- PP界面粘结状况对其拉伸疲劳性能有明显的影响 ,界面粘结的改善有利于抗疲劳性的提高。进而通过扫描电镜的观察发现具有良好界面粘结的 GMT- PP在静态拉伸时破坏形式为基体破坏 ,而动态拉伸疲劳破坏则以界面脱粘为主。由于界面粘结强度越高 ,界面脱粘过程越慢 ,因而 。The fatigue behaviour of continuous-glass-fibre-mat reinforced polypropylene composites (GMT-PPs) with different interfacial adhesions is investigated by dynamic fatigue tests. The results show that the effect of the interfacial adhesion on the fatigue performance of GMT-PPs is obvious and the improved interfacial adhesion results in an improved fatigue performance. Through the observation of SEM, it is found that the failure mode is different in static tension from that in dynamic tension for GMT-PPs with strong interfaces. The failure mode of the former is the matrix failure, while that of the latter is the interfacial debonding failure, which means that the fatigue loading has a more damaging effect on the interfacial adhesion than on the polymeric matrix. The stronger the interfacial adhesion, the more difficult the interfacial debonding, thus GMT-PPs with well interfacial adhesion have the better fatigue performance.

关 键 词：玻璃纤维 聚丙烯 动态疲劳 界面粘结 复合材料 粘结强度 抗疲劳性能 

分 类 号：TB332[一般工业技术—材料科学与工程]