COMPUTER MODELING OF

ELECTROMAGNETIC FORMING AND IMPACT WELDING
 
 

A Thesis

Presented in Partial Fulfillment of the Requirements for

the degree Master of Science in the

Graduate School of The Ohio State University
 
 

By

Hemant M. Panshikar, B.Tech

******
 
 

The Ohio State University

2000
 
 

Dr. Glenn S. Daehn, Advisor
 

 (Back to High Velocity Forming Page)



 
 

TABLE OF CONTENTS
 See Copyright Notice








Abstract
Dedication/Acknowledgements
Vita
List of Tables
List of Figures
Introduction

Chapter

1. An Overview of Electromagnetic Forming
        1.1. Introduction
        1.2. Electromagnetic Forming: Operation and Principle
        1.3. Benefits of Electromagnetic Forming Process
        1.4. Modeling of EM forming Process
        1.5. A Rudimentary Analysis of EM forming

2. Modeling Software: Principles and Features
        2.1. Introduction
        2.2. SPH Fundamentals
        2.3. Weaknesses of SPH and GEM Improvements
        2.4. Some Features of GEM
        2.5. Validation of GEM

3. Free Forming of Clamped Sheet
        3.1. Introduction
        3.2. Experimental Procedure
        3.3. GEM Model of The Coupon Test
        3.4. Comparison of Results
            3.4.1. Shape Evolution and Deformation
            3.4.2. Deformation Velocity and Eddy Currents
            3.4.3. Temperature Rise During The Process
        3.5. Summary

4. Free Launch of Flat Plate
        4.1. Introduction
        4.2. Experimental Procedure
        4.3. Experimental Results
        4.4. GEM Analysis: Flat Plate
        4.5. Slotted Plate: Experimental Results and GEM Analysis
        4.6. Summary

5. Modeling of Impact Welding
        5.1. Introduction
        5.2. Explosive Welding Process
        5.3. Literature Review
        5.4. Experimental Basis for The Impact Welding Simulations
        5.5. Autodyn2D SPH Solver and Impact Welding Model
        5.6. Analysis and Comparison of Results
        5.7. Summary

6. Conclusions

Appendix A
Appendix B
References
 
 


6/21/00