Suhir E
Appl Opt. 1990 Jun 20;29(18):2682-5. doi: 10.1364/AO.29.002682.
The tensile force experienced by a coated glass fiber during proof testing is applied to the coating and, therefore, may be reduced because of the buffering effect of the coating. In this study such an effect is evaluated on the basis of an analytical stress model. It is shown that for any finite, even very great, coating compliance, one can always choose a sufficiently long specimen in which the glass fiber is loaded to practically the same level as in an infinitely long composite. The numerical example carried out for a dual-coated fiber, considered for future undersea systems, indicated that if ~10 cm long specimens are employed, 98% of the fiber length will be subjected to a tensile force >99% of the value for the case of an infinitely long fiber. The results obtained can be used for the analysis of the mechanical performance of coated fibers of finite length. They can be utilized, in particular, for selecting appropriate specimen lengths during proof testing.
在验证测试期间，涂层玻璃纤维所承受的拉力作用于涂层，因此，由于涂层的缓冲作用，该拉力可能会减小。在本研究中，基于一个解析应力模型对这种效应进行了评估。结果表明，对于任何有限的，甚至非常大的涂层柔度，总能选择一个足够长的试样，其中玻璃纤维所承受的载荷与无限长复合材料中的载荷实际处于相同水平。针对一种用于未来海底系统的双涂层纤维进行的数值示例表明，如果使用长度约为10 cm的试样，那么纤维长度的98%将承受大于无限长纤维情况下99%的值的拉力。所获得的结果可用于分析有限长度涂层纤维的力学性能。尤其可用于在验证测试期间选择合适的试样长度。
