• CN:11-2187/TH
  • ISSN:0577-6686

›› 1999, Vol. 35 ›› Issue (1): 47-50.

• 论文 • 上一篇    下一篇

扫码分享

不锈钢多轴非比例加载低周疲劳的研究

何国求;陈成澍;高庆;孙训方;沈志云   

  1. 西南交通大学材料工程系
  • 发布日期:1999-01-01

STUDY ON MULTIAIAL LOW CYCLE FATIGUE UNDER NONPROPORTIONAL LOADING OF 316L STAINLESS STEEL

He Guoqiu;Chen Chengshu;Gao Qing;Sun Xunfang;Shen Zhiyun   

  1. Southwest Jiaotong University
  • Published:1999-01-01

摘要: 对316L不锈钢进行了单轴及多轴非比例加载低周疲劳试验及其微结构的观察,分析了非比例循环附加强化及低周疲劳寿命对应变路径依赖性的微观机理,基于微观机理的研究结果,以位错结构特征参量的统计平均值给出了加载路径的非比例度定义,建立了新的多轴非比例加载低周疲劳寿命估算公式。

关键词: 316L不锈钢, 低周疲劳, 非比例加载, 比例边界法, 强度因子, 无单元伽辽金法, 压电材料

Abstract: The tests were performed for 316L stainless steel under uniaxial and multiaxial nonproportional low cycle fatigue, and the microstructures in this material are observed. The micromechanism of dependence of nonproportional cyclic additional hardening and low cycle fatigue life on strain paths are analyzed. Based on the results of research of micromechanism, the new nonproportionality , of loading path is defined with the microstructural parameter-statistical mean value. The new life criterion of nonproportional low cycle fatigue under multiaxial loading is proposed.

Key words: 316L, Low cycle fatigue, Nonproportional loading, stainless steel, Element-free Galerkin method, Intensify factors, Piezoelectric material, Scaled boundary method

中图分类号: