Influence of a static torque on plasticity and asperity-induced closure effects during fatigue crack growth in bainitic steel cylinders loaded in push-pull

被引：1

作者：

Petureau, Louis ^{[1
]}

Doquet, Veronique ^{[1
]}

Dieu, Benjamin ^{[1
,2
,3
]}

机构：

[1] Ecole Polytech, Inst Polytech Paris, Lab Mecan Solides, CNRS,UMR 7649, Route Saclay, F-91128 Palaiseau, France

[2] Ecole Cent Lyon, Lab Tribol & Dynam Syst, CNRS, UMR 5513, 36 Ave Guy Collongue, F-69134 Ecully, France

[3] Naval Grp, Site Nantes Indret,Rue Indret, F-44620 La Montagne, France

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2022年 / 155卷

关键词：

Fatigue crack; Mixed-mode I plus III; Closure effects; T stress; Finite element simulations; CYCLIC MODE-I; FRACTURE-ANALYSIS; FAILURE ANALYSIS; SHAFT; BEHAVIOR;

D O I：

10.1016/j.ijfatigue.2021.106628

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Mode I fatigue crack growth with a superimposed static torque was investigated in bainitic steel. The torque had little effect on crack growth kinetics and path. However, the non-singular stress parallel to the crack front, and bending stresses due to eccentric crack growth triggered crack twisting, even in mode I. A progressive increase in crack sliding displacement was due to a rise in elastic torsional compliance, but also to plastic ratchetting at the crack tip, and to a progressive shearing of crack face asperities, which reduced the enhancement of roughness induced closure by the torque, however shown to enhance plasticity-induced closure.

引用

页数：18