Energy field intensity approach for notch fatigue analysis
Energy field intensity approach for notch fatigue analysis
复制标题
用于缺口疲劳分析的能量场强度方法
DOI：
10.1016/j.ijfatigue.2019.06.010
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发表时间：
2019-10-01
影响因子：
6
通讯作者：
Zhu, Shun-Peng
中科院分区：
文献类型：
--
作者：
Liao, Ding;Zhu, Shun-Peng
具有复杂结构的缺口部件通常是为满足工程功能要求而设计的。几何不连续通常会导致应力集中和多轴应力状态，并最终导致疲劳失效。然而，工程构件缺口疲劳分析的高效方法仍然缺乏。在此基础上，将能量准则与有限元模拟相结合，提出了能量场强度的新概念，建立了基于能量场强度的工程构件多轴应力状态下缺口疲劳分析框架。GH4169和Al 7050-T7451合金的实验结果与模型预测的相关性优于Fatemi-Socie、Sun-Shang和能量准则。
Notched components with complex configurations are normally designed for engineering functional requirements. Geometrical discontinuities generally result into stress concentration and multiaxial stress states and eventually lead to fatigue failure. However, highly efficient methods for notch fatigue analysis of engineering components are still lacking. In this regard, by combining energy criteria with FE simulations, a new concept of energy field intensity (EFI) is proposed and an EFI-based framework is established for notch fatigue analysis of engineering components under multiaxial stress states. Better correlation of model predictions with experimental results of GH4169 and Al 7050-T7451 alloys are provided by the proposed model rather than that by Fatemi-Socie, Sun-Shang and energy criteria.