Effects of micro-stresses from machining and shot-peening processes on fatigue life

被引：19

作者：

Afazov, S. M. ^{[1
]}

Becker, A. A. ^{[1
]}

Hyde, T. H. ^{[1
]}

机构：

[1] Univ Nottingham, Dept Mech Mat & Mfg Engn, Nottingham NG7 2RD, England

来源：

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2010年 / 51卷 / 5-8期

关键词：

Fatigue life; Finite element method; Micro-stresses mapping; Shot-peening; Machining; MECHANICAL-PROPERTIES; INCONEL-718; COMPOSITE;

D O I：

10.1007/s00170-010-2638-y

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

An investigation of the effects of tensile machining and compressive shot-peening residual stresses on fatigue life is presented. The paper is focused on fatigue life modelling using the finite element method (FEM). A representative broached notched specimen under three-point bending is modelled as a 2D plane stress geometry using the FEM. Inconel 718 mechanical and fatigue material properties at 600 degrees C are used. Machining and shot-peening residual stresses are mapped to the macro FE models using mathematical algorithms around the notched area of the specimen and their influence on the fatigue life experiencing high cycle fatigue (HCF) and low cycle fatigue (LCF) is investigated. The results show that the compressive shot-peening residual stresses significantly increase the life at HCF compared to the LCF.

引用

页码：711 / 722

页数：12

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