Elastoplastic finite element analysis of three-dimensional fatigue crack growth in aluminum shafts subjected to axial loading
Elastoplastic finite element analysis of three-dimensional fatigue crack growth in aluminum shafts subjected to axial loading
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DOI：
10.1016/s0020-7683(98)00059-6
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发表时间：
1999-05-01
影响因子：
3.6
通讯作者：
Ortiz, M
中科院分区：
文献类型：
--
作者：
de-Andrés, A;Pérez, JL;Ortiz, M
我们开发了三维内聚单元和一类不可逆内聚定律，能够准确有效地跟踪三维疲劳裂纹前沿并计算随之而来的疲劳寿命曲线。内聚元素根据不可逆内聚定律控制裂纹侧面的分离，最终导致自由表面的形成，并且与块体材料的传统有限元离散化兼容。通过对 Thompson 和 Sheppard (1992a, b, c) 铝轴轴向疲劳试验的模拟，证明了该方法的多功能性和预测能力。该方法重现实验观察到的滩标和疲劳寿命曲线进展的能力尤其值得注意。 (C) 1999 Elsevier Science Ltd. 保留所有权利。
We have developed a three-dimensional cohesive element and a class of irreversible cohesive laws which enable the accurate and efficient tracking of three-dimensional fatigue crack fronts and the calculation of the attendant fatigue life curves. The cohesive element governs the separation of the crack flanks in accordance with an irreversible cohesive law, eventually leading to the formation of free surfaces, and is compatible with a conventional finite element discretization of the bulk material. The versatility and predictive ability of the method is demonstrated through the simulation of the axial fatigue tests of aluminum shafts of Thompson and Sheppard (1992a, b, c). The ability of the method to reproduce the experimentally observed progression of beachmarks and fatigue life curves is particularly noteworthy. (C) 1999 Elsevier Science Ltd. All rights reserved.