A Study on the Analytical Model For Laser Key Hole
- Issued Date
- 2006
- Abstract
- Numerous models for the laser welding have improved the understanding of the laser welding.
A model of deep penetration welding was developed by A Kaplan has been studied in detail and verified using experimentation. A heat transfer analysis and a residual stress analysis are performed to further verify the model.
- Alternative Title
- A Study on the Analytical Model For Laser Key Hole
- Alternative Author(s)
- C.Pramod
- Affiliation
- 조선대학교 대학원
- Department
- 일반대학원 선박해양공학과
- Advisor
- Bang, Han-Sur
- Awarded Date
- 2007-02
- Table Of Contents
- ABSTRACT = 8
List of Figures = 9
List of Tables = 11
Chapter 1 Introduction = 12
1.1 Basic Introduction = 12
1.1.1 Laser Welding = 12
1.1.2 Analytical Model = 13
1.2 Scopes and Objective = 14
1.3 Literature Review = 15
1.3.1 Future Developments in Laser Welding = 15
1.3.2 Existing Analytical Models for Laser welding = 17
Chapter 2 Numerical Simulation of Laser Keyhole = 19
2.1 Introduction = 19
2.2 Heat Distribution and Numerical Simulation = 19
2.2.1 Theory and FEM formulation = 20
2.2.2 Finite Element Coding Flow chart = 25
2.3 Residual Stress and Numerical Simulation = 26
2.3.1 Basic Considerations in Elasto-Plastic Analysis = 26
2.3.1.1 Equilibrium Equation = 26
2.3.1.2 Strain-Displacement Relation = 27
2.3.1.3 Stress-Strain Relation = 27
2.3.2 Finite Element Coding Flow chart = 29
Chapter 3 Analytical Model of Laser Keyhole Profile by A Kaplan = 30
3.1 Brief Outline = 31
3.2 Mathematical Model formulation & Keyhole Calculations = 31
3.2.1 Model description = 31
3.2.2 Model Formulations = 31
3.2.2.1 Heat Loss at the Keyhole = 31
3.2.2.2 Absorbed Beam Power at the Keyhole = 34
3.2.2.3 Energy Balance at the Keyhole = 35
3.2.3 Calculation Procedure = 36
3.3 Absorption mechanisms = 37
3.3.1 Damping by Plasma plume = 38
3.3.2 Power outside the Keyhole wall = 38
3.3.3 First Plasma absorption = 38
3.3.4 First Fresnel absorption = 38
3.3.5 Fresnel absorption during multiple reflections = 39
3.3.6 Plasma absorption during multiple reflections = 40
3.3.7 Governing Equations = 40
3.4 Kaplan's findings & Conclusions = 41
3.4.1 Geometrical Observations = 41
3.4.2 Absorption Characteristics = 42
3.4.2.1 Plasma Plume Damping = 43
3.4.2.2 Power on the work piece = 43
3.4.2.3 Absorptions within the keyhole = 44
3.4.3 Summary of Conclusions = 46
Chapter 4 Experiment = 47
4.1 Material Selection and Parameters = 47
4.2 Fabrication of Work Piece = 48
4.3 Experimental Results = 49
Chapter 5 Result and Discussion = 54
5.1 Assumptions & Justifications = 54
5.2 Keyhole Calculations = 54
5.3 Experimental Verification = 58
5.4 Numerical Verification = 59
5.4.1 Heat transfer Analysis = 59
5.4.2 Residual Stress determination = 60
5.5 Future Modifications = 61
Chapter 6 Conclusion = 62
References = 63
Acknowledgements = 66
- Degree
- Master
- Publisher
- 조선대학교 대학원
- Citation
- C.Pramod. (2006). A Study on the Analytical Model For Laser Key Hole.
- Type
- Dissertation
- URI
- https://oak.chosun.ac.kr/handle/2020.oak/6460
http://chosun.dcollection.net/common/orgView/200000233832
- Appears in Collections:
- General Graduate School > 3. Theses(Master)
- Files in This Item:
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