A novel evaluation method for high cycle and very high cycle fatigue strength

被引：8

作者：

Wu, Han ^{[1
,2
]}

Sun, Chengqi ^{[1
,2
]}

Xu, Wei ^{[3
]}

Chen, Xin ^{[3
]}

Wu, Xiaolei ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China

[3] Beijing Inst Aeronaut Mat, Beijing Key Lab Aeronaut Mat Testing & Evaluat, Beijing 100095, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2023年 / 290卷

基金：

中国国家自然科学基金;

关键词：

Continuous runout method; Fatigue strength; Metallic materials; High cycle fatigue; Very high cycle fatigue; METALLIC MATERIALS; STAIRCASE METHOD; LIFE;

D O I：

10.1016/j.engfracmech.2023.109482

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In this paper, a continuous runout method (CRM) is proposed to evaluate the fatigue strength in high cycle and very high cycle fatigue regimes based on the probability and statistics theory. The CRM features the simultaneous testing of multiple samples such that the testing period could be 1/5-1/3 of that by the common up-and-down method for 16 samples. It is validated by the experimental data for G20Mn5QT steel, 40 Cr steel, and Ti-6Al-4V alloy. The predicted lower limits of fatigue strength by CRM are a little more conservative than those by the up-and-down method.

引用

页数：13

共 24 条

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