【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。更多还原

【Abstract】 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.更多还原