Application of a new model proposal for fatigue life prediction on notches and key-seats
Application of a new model proposal for fatigue life prediction on notches and key-seats
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DOI：
10.1016/s0142-1123(99)00046-8
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发表时间：
1999-09-01
影响因子：
6
通讯作者：
Pluvinage, G
中科院分区：
文献类型：
--
作者：
Qylafku, G;Azari, Z;Pluvinage, G
本文的目的是介绍一种新的宏观力学模型的疲劳寿命预测，考虑到弹塑性应力分布和应力梯度的演变。该模型以应力场强度法为基础，更好地考虑了影响疲劳破坏过程的主要因素。一个非常简短的回顾，以前的一些模型有利于这些方法和疲劳试验结果之间的比较，缺口试样具有两个不同的半径。应力场强度模型的描述，然后给出，新的模型更详细。为了更好地验证该方法对另一种缺口几何形状的疲劳寿命预测，将该方法与带键槽试件旋转弯曲的试验结果进行了比较。在所有情况下，疲劳寿命预测通过使用这种方法，是在非常好的协议与各自的测试结果。(C)1999爱思唯尔科技有限公司。保留所有权利。
The aim of this paper is to introduce a new macro-mechanical model for fatigue life prediction, taking into consideration an elastic-plastic stress distribution and the stress gradient evolution. Mainly based on the stress field intensity approach, this new model tries to better take into account the role of the most important factors influencing the fatigue failure process. A very brief review of some previous models facilitates the comparison between these approaches and fatigue test results obtained on notched specimens with two different radii. A description of the stress field intensity model is then given, followed by the new model in more detail. In order to better verify the fatigue life prediction given by this method on another kind of notch geometry, a comparison between the method and test results on the rotating bending of specimens with key-seats, is carried out. In all cases, the fatigue life predictions obtained by use of this method, are in very good agreement with the respective test results. (C) 1999 Elsevier Science Ltd. All rights reserved.