Study and Analysis of Teflon Utilization in Micro Sheet Hydroforming

目录

声明

Abstract

Table of Contents

CHAPTER ONE IN TRODUCTION AND RESEARCH BACKGROUND

1．2 Microforming Processing

1．3 Size Effects in Micro-forming

1．3．2 Size Effects in Flow Stress

1．3．3 Friction Effects of Micro-forming

1．4 Research Motivations

1．6 Research Methodology

1．7 Thesis organiza60n

CHAPTER TWO MECHANICS OF MICRO SHEET HYDROFORMING

2．1 Micro Sheet Hydroforming

2．2 Description of Micro Sheet Hydroforming Process

2．2．2 Micro Sheet Hydroforming with Die (SHF-D) or High Pressure Hydroforming

2．3 Analysis of Micro Sheet Hydroforming

2．3．1 Formability

2．4 Chapter Summary

CHAPTER THREE EXPERIMENTAL ANALYSIS OF MICRO SHEETS

3．1 Analytical Model Study of Tensile Test of Micro Sheets

3．1．1 Introduction

3．1．2 Uniaxial Tensile Test

3．1．3 Analysis of Tensile Test Results

3．2．Experimental Analysis of Sheet Hydroforming

3．2．2 Designing and Fabrication of Die

3．2．3．Experiment Equipment and Die Structure

3．2．4 Blank Material and Size

3．2．5．Sheet Hydroforming without PTFE Bulging of Micro Sheet

3．2．6．Results

3．3．Chapter Summary

CHAPTER FOUR NUMERICAL SIMULATION OF SHEET HYDROFORMING

4．1 Introduction

4．2 Numerical Analysis

4．3 Simulation of Sheet Hydrofoming Process

4．3．1 Modeling(3-D Structural Modeling)

4．3．2 Mesh

4．3．3 Boundary Conditions

4．4 Simulation Result of Micro Sheet Hydroforming

4．4．1 Simulation Results as Effect of PTFE Materials on Thinning Rate

4．4．2 Simulation Results as Effect of PTFE Materials on Bulging Height

4．4．3．Simulation Results as Efrect of PTFE Materials on Strain Distribution

4．4．4 Simulation Results as Effect of PTFE Materials on Stress Distribution

4．4．5 Simulation Results as Friction Effect of PTFE Materials

4．5 Comparison between Experiment and Simulation

4．5．1 Thickness Distribution Comparison

4．5．2 Bulge Height Comparison without PTFE

4．5．3 Bulge Height Comparison with PTFE

4．6 Chapter Summary

CHAPTER FIVE CONCLUSION

Acknowledgement

References