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Determining stress intensity factors of composites using crack opening displacement

机译:用开裂位移确定复合材料的应力强度因子

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The main purpose of this paper is to find the mixed-mode stress intensity factors of composite materials using the crack opening displacement (COD). First, a series solution of the composite material with a crack was used to evaluate COD values. Then, the least-squares method was used to calculate mixed-mode stress intensity factors. This algorithm can be applied to any method that generates or measures COD values. The major advantage of this method is that COD values very near the crack tip are not necessary. Both finite element simulations and laboratory experiments were applied to validate this least-squares method with acceptable accuracy if the even terms of the series solution are removed.
机译:本文的主要目的是利用裂纹开口位移(COD)来找到复合材料的混合模式应力强度因子。首先,将具有裂纹的复合材料的一系列溶液用于评估COD值。然后,使用最小二乘法计算混合模式应力强度因子。该算法可以应用于生成或测量COD值的任何方法。该方法的主要优点是,不需要非常靠近裂纹尖端的COD值。如果去除了级数解的偶数项,则通过有限元模拟和实验室实验来以可接受的精度验证这种最小二乘法。

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