Multiaxial Fatigue Damage Models
Multiaxial Fatigue Damage Models
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DOI：
10.4028/www.scientific.net/kem.324-325.747
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发表时间：
2006-11
期刊：
影响因子：
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通讯作者：
D. Shang;Guoqin Sun;Jing Deng;Chu-liang Yan
中科院分区：
文献类型：
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作者：
D. Shang;Guoqin Sun;Jing Deng;Chu-liang Yan
本文提出了两个多轴损伤参数。提出的疲劳损伤参数不含任何重量常数，可用于多轴比例加载或非比例加载。在研究拉扭转薄管多轴疲劳试件临界平面方法的基础上，提出了两种基于最大剪切应变和临界平面上最大剪切应变相邻拐点间法向应变偏移的多轴疲劳损伤模型。将所建立的多轴疲劳损伤模型应用于拉伸扭转薄管的疲劳寿命预测，结果与实验数据吻合较好。
Two multiaxial damage parameters are proposed in this paper. The proposed fatigue damage parameters do not include any weight constants, which can be used under either multiaxial proportional loading or non-proportional loading. On the basis of the research on the critical plane approach for the tension-torsion thin tubular multiaxial fatigue specimens, two multiaxial fatigue damage models are proposed by combining the maximum shear strain and the normal strain excursion between adjacent turning points of the maximum shear strain on the critical plane. The proposed multiaxial fatigue damage models are used to predict the fatigue lives of the tension-torsion thin tube, and the results show that a good agreement is demonstrated with experimental data.