Effects of fiber length and fiber orientation distributions on the tensile strength of short-fiber-reinforced polymers
Effects of fiber length and fiber orientation distributions on the tensile strength of short-fiber-reinforced polymers
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DOI：
10.1016/s0266-3538(96)00072-3
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发表时间：
1996-01-01
影响因子：
9.1
通讯作者：
Lauke, B
中科院分区：
文献类型：
--
作者：
Fu, SY;Lauke, B
提出了一种考虑纤维长度和取向分布影响的短纤维增强聚合物（SFRP）拉伸强度的解析预测方法。两个概率密度函数用于模拟纤维长度和纤维取向的分布。考虑到极限纤维强度和临界纤维长度对倾斜角的依赖性以及倾斜角对斜纤维桥接应力的影响，推导了SFRP的强度随纤维长度和纤维取向分布的变化关系。研究了平均纤维长度、最可几长度（模长）、临界纤维长度、平均纤维取向、最可几纤维取向和纤维取向系数对SFRP拉伸强度的影响。该模型提供了必要的信息，以确定需要什么样的纤维长度分布，什么样的纤维取向分布和什么样的界面粘合力，以实现所需的复合材料强度。本理论，然后应用到现有的实验结果和协议是令人满意的。(C)1996年爱思唯尔科学有限公司
This paper presents an analytical method considering the effects of fiber length and fiber orientation distributions for predicting the tensile strength (TS) of short-fiber-reinforced polymers (SFRP). Two probability density functions are used for modelling the distributions of fiber length and fiber orientation. The strength of SFRP is derived as a function of fiber length and fiber orientation distribution taking into account the dependences of the ultimate fiber strength and the critical fiber length on the inclination angle and the effect of inclination angle on the bridging stress of oblique fibers. Then the effects of the mean fiber length, the most probable length (mode length), the critical fiber length, the mean fiber orientation, the most probable fiber orientation and the fiber orientation coefficient on the tensile strength of SFRP have been studied in detail. This model provides the necessary information to determine what fiber length distribution, what fiber orientation distribution and what interfacial adhesion are required to achieve a desired composite strength. The present theory is then applied to existing experimental results and the agreement is found to be satisfactory. (C) 1996 Elsevier Science Limited