A Dynamic Explanation of The Hybrid Effect
A Dynamic Explanation of The Hybrid Effect
复制标题
混合效应的动态解释
DOI：
--
复制
发表时间：
1981
期刊：
影响因子：
--
通讯作者：
T. Chou
中科院分区：
文献类型：
--
作者：
J. Xing;G. Hsiao;T. Chou
进行了理论分析，以评估由低伸长率（LE）和高伸长率（HE）纤维组成的混合复合材料中的动态应力集中系数。在纤维断裂时，本模型预测沿着混合材料中的每根纤维传播的两个应力波。由这些波在紧邻纤维断裂的纤维中间部分贡献的动态响应的相位差由每单位长度的纤维质量控制。动态响应的大小由纤维拉伸刚度决定。研究得出的结论是，混合效应总是以有益的方式存在，母体 LE 纤维复合材料的情况为混合体中的动态应力集中因子提供了上限。已经检验了推导中近似值的有效性。
A theoretical analysis has been performed to evaluate the dynamic stress concentration factor in hybrid composites composed of low elongation (LE) and high elongation (HE) fibers. At a fracture of a fiber, the present model predicts two stress waves propagating along each fiber in the hybrid. The phase difference of the dynamic responses contributed by these waves at the middle section of a fiber immediately adjacent to a fiber breakage is controll ed by the fiber mass per unit length. The magnitude of the dynamic responses is determined by the fiber extensional stiffness. The study concludes that hybrid effect always exists in a beneficial manner and the case of the parent LE fiber composite provides the upper bound for the dynamic stress concen tration factor in hybrids. The validity of the approximations made in the derivations has been examined.