压缩载荷下碳/环氧复合材料的动力学响应行为  

Behavior Characterization of Dynamic Mechanical Response for Carbon/Epoxy Composites Under Compressive Load

作　　者：曹茂盛[1] 周伟[1] 雷义龙[1] 荣吉利[1] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081

出　　处：《材料工程》2008年第4期15-18,共4页Journal of Materials Engineering

基　　金：十一五国防基础科研计划资助项目(A2220061080);武器装备预研基金资助项目(5141240205BQ0154);国家自然科学基金资助项目(10672020)

摘　　要：以铺层顺序为[45/0/-45/0/-45/90/0]s的新型碳纤维增强改性环氧树脂复合材料为研究对象,采用分离式Hopkinson(SHPB)压杆装置为加载手段,在高速冲击载荷条件下,对复合材料层合板在厚度方向和平面内纵向的动态压缩性能进行实验研究,分别得到在四种不同应变率下的应力-应变关系;并借助SEM对复合材料断口损伤形貌进行表征。结果表明:在高应变率条件下,层合板厚度方向的动态压缩强度及失效应变明显大于平面内加载方向;基体开裂、分层及剪切断裂是复合材料在动态压缩条件下的主要损伤及断裂模式。The compressive tests were performed vel carbon fiber reinforcement epoxy composites to at obtain the dynamic mechanical properties of a nohigh strain rate range. The dynamic compressive properties were investigated utilizing the Split Hopkinson Pressure Bar （SHPB） apparatus through the normal direction as well as the in-plane direction under high velocity impact loading. Based on the test results, the dynamic stress-strain relation was obtained at four different strain rates loading, respectively. At the same time, the fractography of the samples was characterized by the SEM method. The results showed that the dynamic compressive strength and the failure strain of the laminated samples in the normal direction were higher than that in the in-plane direction at high strain rates. The main damage and fracture modes were matrix crack, delamination and shear fracture under the dynamic compressive loading.

关 键 词：动态压缩 高应变率 损伤形貌 

分 类 号：TB33[一般工业技术—材料科学与工程]