STUDY ON LIFE PREDICTION AND FATIGUE TEST OF ZM6 MATERIAL WITH IMPACT PIT

LI Jian; YANG SuSong; YANG XianKun; WAN ZhenHua; HU WeiPing

doi:10.16579/j.issn.1001.9669.2021.05.008

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STUDY ON LIFE PREDICTION AND FATIGUE TEST OF ZM6 MATERIAL WITH IMPACT PIT

更新时间：2022-09-22

- STUDY ON LIFE PREDICTION AND FATIGUE TEST OF ZM6 MATERIAL WITH IMPACT PIT
- Journal of Mechanical Strength Vol. 43, Issue 5, Pages: 1070-1076(2021)
- 作者机构：
  
  1. 中国航发湖南动力机械研究所
  2. 北京航空航天大学航空科学与工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2021.05.008
  CLC：
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LI Jian, YANG SuSong, YANG XianKun, et al. STUDY ON LIFE PREDICTION AND FATIGUE TEST OF ZM6 MATERIAL WITH IMPACT PIT. [J]. 43(5):1070-1076(2021)
DOI：

LI Jian, YANG SuSong, YANG XianKun, et al. STUDY ON LIFE PREDICTION AND FATIGUE TEST OF ZM6 MATERIAL WITH IMPACT PIT. [J]. 43(5):1070-1076(2021) DOI： 10.16579/j.issn.1001.9669.2021.05.008.

摘要

制备了ZM6镁合金材料的光滑试样、缺口试样以及含冲击凹坑缺陷的试验件,并对这些试验件进行了疲劳试验测试,获得了含冲击缺陷时不同应力水平下试验件的疲劳寿命。基于连续损伤力学理论,在高周疲劳损伤演化模型的基础上,提出了一种新的多轴疲劳的损伤演化模型,用于描述凹坑局部材料的疲劳损伤。采用Abaqus软件对凹坑缺陷的形成过程进行模拟,得到了凹坑缺陷的几何形状和局部的残余应力应变场。通过Abaqus子程序Usdfld将材料本构和损伤演化进行耦合,从而实现含凹坑缺陷结构件疲劳寿命的计算。结果显示,预测的中值寿命结果与试验中值寿命结果一致,误差在两倍误差带内,符合工程使用的要求。

Abstract

The smooth specimens,notched specimens and impact crater specimens of ZM6 material were prepared. The fatigue test of these specimens was carried out,and the fatigue life of these specimens under different stress levels was obtained.Based on the theory of continuum damage mechanics,a new multi-axial fatigue damage evolution model is proposed to describe the fatigue damage of local material with impact pits. ABAQUS was used to simulate the formation process of the impact pit crater,and the geometry of the pit crater and the local residual stress-strain field were obtained. By using the ABAQUS subroutine USDFLD,the material constitution and damage evolution were coupled,so as to realize the calculation of the fatigue life of the structure with impact pit crater. The results shows that the predicted median life was consistent with the test median life,and the error was within twice the error band,white meet the requirements of the engineering application.

关键词

ZM6冲击凹坑疲劳寿命连续损伤力学残余应力

Keywords

ZM6Impact pitFatigue lifeContinuum damage mechanicsResidual stress

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