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首页> 外文期刊>International Journal of Solids and Structures >Stress singularity analysis around the singular point on the stress singularity line in three-dimensional joints
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Stress singularity analysis around the singular point on the stress singularity line in three-dimensional joints

机译：三维关节应力奇异线上奇点周围的应力奇异分析

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摘要

The characteristics of the stress fields around a singular point on the stress singularity line of dissimilar materials in three-dimensional joints are investigated using BEM. Contour for the order of stress singularity around the point is mapped on Dundurs' parameters plane using eigen value analysis by FEM. The results in 3D joints are compared with those in 2D joints having the same cross section and material combination. The order of stress singularity around the singular point on the stress singularity line in 3D joints is almost identical with that in 2D joints in the singularity region. However, the zero boundary of singularity in 3D joints is slightly different from that in 2D joints. Furthermore, the multiple root of p = 1 exists in the eigen value analysis by FEM. Therefore, logarithmic singularity possibly occurs around the singular point on the stress singularity line. Then, the stress distributions around this point are expressed by the combination of the r(lambda) term and logarithmic singularity terms. Finally, the characteristics of the stress intensity factors of the r(lambda) term and logarithmic singularity terms around the singular points are investigated. (C) 2004 Elsevier Ltd. All rights reserved.
机译：利用BEM研究了异种材料在三维接头中应力奇异线上奇点周围的应力场特征。使用有限元特征值分析，将点周围应力奇异点的轮廓绘制在Dundurs参数平面上。将3D关节中的结果与具有相同横截面和材料组合的2D关节中的结果进行比较。在3D关节中，应力奇点线上的奇点周围的应力奇点顺序与在奇点区域中的2D关节中的奇点顺序几乎相同。但是，3D关节中的奇异性零边界与2D关节中的奇异性零边界略有不同。此外，在有限元特征值分析中，存在p = 1的多重根。因此，对数奇点可能在应力奇点线上的奇点附近发生。然后，通过r（λ）项和对数奇异项的组合来表达该点附近的应力分布。最后，研究了奇异点周围的r（λ）项和对数奇异项的应力强度因子的特征。 （C）2004 Elsevier Ltd.保留所有权利。

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