Numerical simulation of residual stress field induced by laser shock processing with square spot

Laser shock processing（LSP）,also known as laser peening,is a novel surface treatment technique in the past few years.Compressive residual stresses which imparted by LSP are very important for improving fatigue,corrosion and wea rresistance of metals.Finite element analysis（FEA） simulation using ABAQ...

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Bibliographic Details
Published inJournal of Shanghai University Vol. 15; no. 6; pp. 553 - 556
Main Author 曹子文 车志刚 邹世坤 费群星
Format Journal Article
LanguageEnglish
Published Heidelberg Shanghai University Press 01.12.2011
National Key Laboratory of Science and Technology on Power Beam Processes, Beijing Aeronautical Manufacturing technology Research Institute, Beijing 100024, P. R. China
Subjects
ABAQUS软件
Ablation
Classical Mechanics
Computer simulation
Engineering
Environment
Finite element method
Laser shock processing
Lasers
Life Sciences
Materials Science
Mathematical and Computational Engineering
Mathematical models
Mechatronics
Residual stress
Titanium base alloys
压缩残余应力
场诱导
数值模拟
残余应力场
激光冲击处理
脉冲持续时间
表面处理技术
laser shock processing
residual stress
Ti-6Al-4V
square spot
aser shock processing
Online AccessGet full text
ISSN1007-6417
1863-236X
DOI10.1007/s11741-011-0785-1

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Summary:Laser shock processing（LSP）,also known as laser peening,is a novel surface treatment technique in the past few years.Compressive residual stresses which imparted by LSP are very important for improving fatigue,corrosion and wea rresistance of metals.Finite element analysis（FEA） simulation using ABAQUS software has been applied to predict residualstresses induced by LSP on Ti-6Al-4V titanium alloy with laser pulse duration 30 ns and water confined ablation mode.The residual stress field generated by different shape laser spots was studied,and the square laser spot is shown the most suitability for avoiding stress lack phenomenon and overlapping LSP.Surface residual stresses and plastically affected depth within single square spot both increased with the increase of laser intensity and laser shock times.Furthermore,compared with circle and ellipse spot,the residual stress distribution in overlapping square spots is very uniform only with small overlapping ratio.LSP with square spot can process advantageous residual stress field,and this technique will be used widely.
Bibliography:Laser shock processing（LSP）,also known as laser peening,is a novel surface treatment technique in the past few years.Compressive residual stresses which imparted by LSP are very important for improving fatigue,corrosion and wea rresistance of metals.Finite element analysis（FEA） simulation using ABAQUS software has been applied to predict residualstresses induced by LSP on Ti-6Al-4V titanium alloy with laser pulse duration 30 ns and water confined ablation mode.The residual stress field generated by different shape laser spots was studied,and the square laser spot is shown the most suitability for avoiding stress lack phenomenon and overlapping LSP.Surface residual stresses and plastically affected depth within single square spot both increased with the increase of laser intensity and laser shock times.Furthermore,compared with circle and ellipse spot,the residual stress distribution in overlapping square spots is very uniform only with small overlapping ratio.LSP with square spot can process advantageous residual stress field,and this technique will be used widely.
CAO Zi-wen,CHE Zhi-gang,ZOU Shi-kun,FEI Qun-xing National Key Laboratory of Science and Technology on Power Beam Processes,Beijing Aeronautical Manufacturing technology Research Institute,Beijing 100024,P.R.China
laser shock processing; square spot; Ti-6Al-4V; residual stress
31-1735/N
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1007-6417
1863-236X
DOI:10.1007/s11741-011-0785-1