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An experimental analysis of auxetic folded cores for sandwich structures based on origami tessellations
Table of Contents
Abstract
Acknowledgements
Table of Contents
List of Tables
List of Figures
List of Abbreviations
List of Symbols
1 Introduction
1.1 Background and Motivation
1.2 Previous Work
1.3 Overview of Auxetic Materials
1.4 Overview and History of Origami
1.5 Objective and Outline of Thesis
2 Sandwich Structure Cores Using Folded Patterns
2.1 Introduction
2.2 Chevron Folded Core
2.2.1 Original Chevron Pattern
2.2.2 Modified Chevron Pattern
2.3 Water Bomb Tessellation Folded Core
2.4 Square Twist Folded Core
2.5 Inverted Honeycomb Folded Core
2.6 Equilateral Triangle Folded Core
2.7 Aramid Paper Samples
3 Compression Testing of Flat Sandwich Structure Cores
3.1 Introduction
3.2 Methodology and Sample Preparation for Core Flat Compression Testing
3.3 Results of Compression Testing for Strain Rate of 0.25 mm/minute
3.3.1 Chevron Pattern
3.3.2 Modified Chevron Pattern
3.3.3 Water Bomb Tessellation Pattern
3.3.4 Square Twist Pattern
3.3.5 Inverted Honeycomb Pattern
3.3.6 Equilateral Triangle Pattern
3.4 Results of Compression Testing for Strain Rate of 1 mm/minute and Validation of Strain Rate Effect on Each Core
3.5 Analysis of Compression Testing
3.5.1 Chevron Pattern
3.5.1.1 Original Chevron
3.5.1.2 Modified Chevron
3.5.1.3 Chevron Comparison and Conclusions
3.5.2 Water Bomb Tessellation Pattern
3.5.3 Square Twist Pattern
3.5.4 Inverted Honeycomb Pattern
3.5.5 Equilateral Triangle Pattern
3.5.6 Young’s Modulus Calculations
3.5.7 Comparison of Patterns
4 Compression Testing of Synclastic Sandwich Structure Cores
4.1 Introduction
4.2 Methodology for Synclastic Compression Testing
4.3 Results and Analysis of Synclastic Compression Testing
4.4 Young’s Modulus and Poisson’s Ratio
4.5 Synclastic Compression Test Conclusions
5 Theory Behind Impact Testing of Folded Cores
6 Conclusions and Future Work
6.1 Concluding Remarks
6.2 Future Work Recommendations
References
A Young’s Modulus Calculation for Flat Compression Testing
B Young’s Modulus and Poisson’s Ratio Calculation for Synclastic Compression Testing
C Modulus of Resilience Calculation Bài viết liên quan
