The strength and failure of silica optical fibers
The strength and failure of silica optical fibers
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石英光纤的强度和失效
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
S. Law
中科院分区：
文献类型：
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作者：
C. Yan;R. Bai;H. Yu;J. Canning;S. Law
采用拉伸试验、断裂力学和数值分析方法研究了普通石英光纤和微结构石英光纤的机械强度和失效行为。研究了聚合物涂层对破坏行为的影响。结果表明，所有这些纤维都以脆性方式破坏，并且通常从纤维表面开始破坏。涂层光纤中观察到的失效载荷高于裸光纤中的失效载荷。气孔的引入降低了纤维的强度，气孔的几何排列方式对纤维纵向应力分布有显著影响。这些结果对光纤的设计、制造和评价具有潜在的指导意义。
The mechanical strength and failure behavior of conventional and microstructured silica optical fibers was investigated using a tensile test and fracture mechanics and numerical analyses. The effect of polymer coating on failure behavior was also studied. The results indicate that all these fibers fail in a brittle manner and failure normally starts from fiber surfaces. The failure loads observed in coated fibers are higher than those in bare fibers. The introduction of air holes reduces fiber strength and their geometrical arrangements have a remarkable effect on stress distribution in the longitudinal direction. These results are potentially useful for the design, fabrication and evaluation of optical fibers for a wide range of applications.