Influences of residual stresses, frictional shear stress at debonded interface and interactions among broken components on interfacial debonding in unidirectional multi-filamentary composites
Influences of residual stresses, frictional shear stress at debonded interface and interactions among broken components on interfacial debonding in unidirectional multi-filamentary composites
复制标题
残余应力、脱粘界面摩擦剪应力以及断裂组分之间的相互作用对单向多丝复合材料界面脱粘的影响
DOI：
10.1163/156855498x00135
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发表时间：
1997
影响因子：
2.6
通讯作者：
T. Inoue
中科院分区：
文献类型：
--
作者：
Shojiro Ochiai;I. Okumura;Mototsugu Tanaka;M. Hojo;T. Inoue
在多组分单向纤维增强复合材料的脱粘过程中，纤维和基体的断裂组分与脱粘区相互作用。在这项工作中，一个新的二维剪滞模拟方法已被开发，以调查这种相互作用下的残余应力和摩擦剪应力的影响下，在脱粘界面，它已被应用到获得的脱粘过程的轮廓。结果表明：（1）界面间的相互作用加速了脱粘的发生，（2）脱粘界面处摩擦剪应力的存在降低了脱粘的增长速率;以及（3）当断裂组分是基体时，基体和纤维中纵向上分别存在的拉伸和压缩残余应力起到加速剥离增长的作用，而当断裂的组分是纤维时，它起阻滞作用。
In the debonding process of multi-filamentary unidirectional fiber-reinforced composites, the broken components (fiber and matrix) and debonded regions interact with each other. In this work, a new two-dimensional shear lag simulation method has been developed to investigate such interactions under the influences of the residual stresses and frictional shear stress at the debonded interface and it has been applied to obtain the outlines of the debonding process. It is shown that (1) the debonding is hastened by the interactions; (2) the existence of the frictional shear stress at debonded interface reduces the growth rate of the debonding; and (3) the existence of tensile and compressive residual stresses in the longitudinal direction in the matrix and fiber, respectively, acts to hasten the growth of the debonding when the broken component is matrix, while it acts to retard when the broken component is fiber.