Lifetime Prediction of Components Including Initiation Phase
Lifetime Prediction of Components Including Initiation Phase
复制标题
组件的寿命预测，包括启动阶段
DOI：
10.1115/1.2436569
复制
发表时间：
2007
影响因子：
1.5
通讯作者：
A. Brueckner
中科院分区：
文献类型：
--
作者：
M. Besel;A. Brueckner
采用裂纹萌生的细观力学模型和裂纹扩展的断裂力学模型计算了受疲劳载荷的构件的寿命分布。这些模型被实现在一个计算机代码中使用的局部应力场作为输入数据，在有限元分析。元素的故障概率的定义，使我们能够识别关键区域，是独立的网格细化。最后给出了一个例子来说明代码的功能。特别强调的是把在寿命分布的初始阶段的效果。
The lifetime distribution of a component subjected to fatigue loading is calculated using a micromechanics model for crack initiation and a fracture mechanics model for crack growth. These models are implemented in a computer code which uses the local stress field obtained in a finite-element analysis as input data. Elemental failure probabilities are defined which allow us to identify critical regions and are independent of mesh refinement. An example is given to illustrate the capabilities of the code. Special emphasis is put on the effect of the initiation phase on the lifetime distribution.