Fatigue analysis under variable amplitude loading using an energy parameter
Fatigue analysis under variable amplitude loading using an energy parameter
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DOI：
10.1016/s0142-1123(02)00169-x
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发表时间：
2003-07-01
影响因子：
6
通讯作者：
Nam, KM
中科院分区：
文献类型：
--
作者：
Lee, BL;Kim, KS;Nam, KM
能量参数占正常和剪切变形是用来预测变幅多轴载荷下的疲劳寿命。疲劳损伤计算作为一个功能的方向的平面，和最大的损伤平面被认为是临界平面。采用线性损伤准则，雨流循环计数的剪切或正应变的历史取决于哪一个给更多的伤害时，单独评估。该方法产生的疲劳寿命相关性与现有的方法（S45C，SNCM 439，SNCM 630）的材料在剪切模式下失败。然而，对于表现出混合的正常和剪切断裂行为的不锈钢304，发现了显著的改进。(C)2003爱思唯尔科技有限公司版权所有。
An energy parameter accounting for normal and shear deformation is used to predict fatigue lives under variable amplitude multiaxial loading. Fatigue damage is computed as a function of orientation of the plane, and the maximum damage plane is considered as the critical plane. The linear damage rule is employed with rainflow cycle counting either on the shear or on the normal strain history depending on which gives more damage when evaluated individually. The method yields fatigue life correlations comparable to those by existing methods for materials failing in shear mode (S45C, SNCM439, SNCM630). However, a noticeable improvement is found for stainless steel 304 that exhibits a mixed normal and shear fracture behavior. (C) 2003 Elsevier Science Ltd. All rights reserved.