封面
声明
英文摘要
中文摘要
目录
CHAPTER 1 INTRODUCTION
1.1 Purpose
1.2 Welding Residual Stresses
1.3 Research Overviews
1.4 Research Objectives and Innovations
1.5 Organization of Thesis Report
CHAPTER 2 THEORETICAL BACKGROUND
2.1 Metallurgy of Steels
2.2 Welding Metallurgy
2.3 Weldability of Austenitic Stainless Steels
2.4 Electric Arc as a Welding Heat Source
2.5 Welding Heat Source Output
2.6 Development of Stress and Distortion during Welding
2.7 Analytical Model for Analysis of Arc Welding
2.8 Finite Element Formulation
2.9 Conclusion
CHAPTER 3 FE SIMULATION METHODOLOGY
3.1 Introduction
3.2 Welding Simulation Approach
3.3 FE Model
3.4 Heat Source Model
3.5 Modeling of Heat Losses
3.6 Material Model
3.7 Metal Deposition Model
3.8 Structural Analysis
3.9 Conclusion
CHAPTER 4 WELDING INDUCED RESIDUAL STRESSES
4.1 Residual Stress Generation
4.2 Residual Stresses in Welding
4.3 Residual Stress Measurement Techniques
4.4 Experimental Validation
4.5 Thermal Effects of Welding
4.6 Welding Residual Stress Fields
4.7 Conclusion
CHAPTER 5 STUDY ON FACTORS AFFECTING RESIDUAL STRESSES
5.1 Parametric Studies
5.2 Effect of Welding Heat Input
5.3 Effect of Tack Weld Orientation
5.4 Effect of Pipe Outer Diameter
5.5 Effect of Pipe Thickness
5.6 Effect of Weld Gap
5.7 Conclusion
CHAPTER 6 SIMULATION OF WELD IMPROVEMENT TECHNIQUE
6.1 Introduction
6.2 Weld Geometry Modification Methods
6.3 Residual Stress Method
6.4 Ultrasonic Impact Treatment
6.5 Ultrasonic Peening
6.6 Stress Reliving Simulation
6.7 Results and Discussion
6.8 Conclusion
CONCLUSIONS AND RECOMMENDATIONS
参考文献
RESEARCH PUBLICATIONS
致谢