光纤用于3-D编织复合材料结构失效分析的实验研究  

Experimental research on structural failure analysis of 3-D braided composites by braided optical fibers

作　　者：李向华[1] 袁慎芳[1] 刘小会[1] 周国鹏[1] 

机构地区：[1]南京航空航天大学智能材料与结构航空科技重点实验室,江苏南京210016

出　　处：《功能材料》2005年第2期267-269,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(59905021);国防预研基金资助项目(402030202);江苏省创新人才基金资助项目(BK2002416);国家航空基金资助项目(01G52075)

摘　　要：针对编入光纤光栅的三维编织复合材料试件进行了拉伸实验,从宏观角度研究了各部分的力学行为,并对拉伸后试件断口进行了电镜扫描,从细观角度分析了结构的破坏机制,实验结果表明在光纤光栅失效后不久,编织结构预制件即开始从弹性区域进入到塑性区域。这有利于对编织结构失效位置和趋势的判定。从而也为今后从所编入光纤角度考虑来研究编织复合材料强度预估和失效判据奠定了实验基础。Tensile strength experiments had been done for 3-D braided composites with optical Bragg gratings braided. Their mechanical properties are investigated from the macroscopic view, SEM analyses of the specimens fracture on the basis of tensile experiments have been conducted. And from the microscopic view the failure mechanism of braided structures was also discussed. Experiment results show that braided preforms had been run into plastic zone just soon after optical fiber gratings had been failed, which was helpful to the determination of braided structures failure position and trend. All these results provide an experimental basis for further studies on the strength prediction and failure criterion's setup by the means of braided optical fiber.

关 键 词：光纤光栅 编织结构 拉伸强度 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]