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Effect of Crack Length to Plate Width Ratio on Stress Intensity Distribution at the Crack Tip

机译：裂纹长度与板宽比对裂纹尖端应力强度分布的影响

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摘要

To start the comprehending of the materials fracture, first must understand the stress fields and deformation distribution at the crack tips. Analysis the behavior of crack for a solid plate may be extensive importance of the plate design to evade the failure. The crack is small when rivalled to the dimension of solid plate and the smallest crack ligament to the exterior plate region is greatly than the crack can be estimated for an infinite plate with finite crack. The variant of the stress field and stress intensity distribution is not great in profile compared with the variation in values. The result evaluated using finite element method to analysis by using Ansys Parametric Design Language (APDL) code in Ansys v.11 with static analysis at two different cases for carbon steel material alloy. In the first case, tension load applied at the upper edge of the plate model and in the second case, shear load applied at the upper edge. The results extracted from the current study show increasing the crack length to width ratio (a/b) from 0.1 to 0.9, increases the Von Misses stress and stress intensity values especially at the crack tip. The Von Misses stress increasing to 369 MPa while the increasing to 1650 MPa in the first case which represent the maximum values from two cases. The extracted results appear that the elastic stress intensity under static load is above the yield strength of the two cases load take into account in the current study.
机译：要开始理解材料的断裂，首先必须了解裂纹尖端的应力场和变形分布。分析实心板的裂纹行为对于规避故障的板设计可能具有广泛的重要性。当与实心板的尺寸相对应时，裂纹很小，并且到外板区域的最小裂纹韧度大大超过了具有有限裂纹的无限板的裂纹估计值。与值的变化相比，应力场和应力强度分布的变化在轮廓上并不大。使用Ansys v.11中的Ansys参数设计语言（APDL）代码使用有限元方法对结果进行了评估，并在两种不同情况下对碳钢材料合金进行了静态分析。在第一种情况下，拉力载荷施加在板模型的上边缘，在第二种情况下，剪切力施加在上边缘。从当前研究中提取的结果表明，裂纹的长宽比（a / b）从0.1增加到0.9，增加了Von Misses应力和应力强度值，尤其是在裂纹尖端。在第一种情况下，Von Misss应力增加到369 MPa，而增加到1650 MPa，这是两种情况下的最大值。提取的结果表明，在当前研究中，静载荷下的弹性应力强度高于两种情况下的屈服强度。

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