高性能玻璃纤维增强树脂基复合材料拉-压疲劳行为  

Tension-Compression Fatigue Behavior of High Performance Glass Fiber Reinforced Resin Matrix Composites

作　　者：马丹[1] 方允伟 王佳庆[1] 王玉梅[1] 徐琪[1] MA Dan;FANG Yunwei;WANG Jiaqing;WANG Yumei;XU Qi(Sinoma Science ＆ Technology Co.,Ltd.,Nanjing Fiber Glass Research ＆ Design Institute,Nanjing 210012)

机构地区：[1]中材科技股份有限公司,南京玻璃纤维研究设计院,南京210012

出　　处：《宇航材料工艺》2018年第4期63-66,共4页Aerospace Materials & Technology

基　　金：江苏省创新能力建设计划(BM2015001)

摘　　要：对LTX1240玻璃纤维/环氧复合材料开展拉-压疲劳试验,绘制S-N曲线进行疲劳寿命预测,利用扫描电镜观察疲劳试样断口形貌,分析其在拉-压循环载荷作用下的失效模式。结果表明:LTX1240玻璃纤维增强环氧树脂基复合材料的条件疲劳极限为278 MPa;失效过程为树脂基体最先破坏,接着界面分层乃至纤维拉伸、剪切破坏,它们相互作用形成了弥散损伤区并据此扩展发生材料断裂。Tension-compression fatigue test of LTX 1240 fiber/epoxy composite was studied in this paper.The fatigue life was predicted by plotting S-N curve,fracture surface were observed in SEM,and the failure mode was analyzed.The results show that the conditional fatigue limit of the composite laminates is 278 MPa.The failure process is the first resin matrix failure,and then generate interface stratification and even the tensile and shear failure of the fiber,then the interactings form the dispersion damage zone lead to the material fracture occurred.

关 键 词：玻璃纤维 复合材料 拉-压疲劳 S-N曲线 失效分析 

分 类 号：TB33[一般工业技术—材料科学与工程]