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折纸薄壁结构

中文摘要第4-5页
ABSTRACT第5页
NOTATION第14-17页
CHAPTER 1 INTRODUCTION第17-20页
    1.1 Thin-walled Structures第17页
    1.2 Origami Patterns第17-18页
    1.3 Scope and Layout of Dissertation第18-20页
CHAPTER 2 LITERATURE REVIEW第20-31页
    2.1 Current Research on Origami Techniques第20-22页
        2.1.1 Origami Mathematics第20-21页
        2.1.2 Rigid Origami Patterns第21-22页
    2.2 Thin-walled Tubes as Energy Absorbing Devices第22-27页
        2.2.1 Background第22-23页
        2.2.2 General Axial Crushing Stages and Performance Criteria第23-24页
        2.2.3 Axial Crushing of Square and Polygonal Tubes第24-27页
        2.2.4 Thin-walled Tubes with Origami Patterns第27页
    2.3 Thin-walled Structures as Deployable Devices第27-31页
        2.3.1 The Waterbomb Origami Tube第28-29页
        2.3.2 The Deployable Antenna Reflectors第29-31页
CHAPTER 3 THE ORIGAMI TUBE DESIGN: GEOMETRY ANDNUMERICAL ANALYSIS第31-48页
    3.1 Origami Geometry第31-36页
        3.1.1 Geometry of the Tachi Pattern第31-32页
        3.1.2 Geometry of the Crash Box Pattern第32-33页
        3.1.3 Geometry of the Derivative Origami Patterns第33-36页
    3.2 Quasi-static Axial Crushing Modelling第36-39页
        3.2.1 Finite Element Analysis第36-37页
        3.2.2 Convergence Tests第37-39页
    3.3 Numerical Simulation Results第39-46页
        3.3.1 Origami Tubes with Tachi Pattern第39-42页
        3.3.2 Origami Tubes with Crash Box Pattern第42-43页
        3.3.3 Origami Tubes with Derivative Origami Patterns第43-46页
    3.4 Summary第46-48页
CHAPTER 4 THIN-WALLED TUBES WITH A KITE-SHAPE RIGIDORIGAMI PATTERNS第48-68页
    4.1 Tube Geometry第48-50页
    4.2 Numerical Simulation第50-58页
        4.2.1 Finite Element Modeling第50-53页
        4.2.2 Conventional Square Tube第53页
        4.2.3 Origami tubes with the kite-shape pattern第53-55页
        4.2.4 Geometry Optimization第55-58页
    4.3 Theoretical Analysis第58-66页
        4.3.1 Rigid Complying Mode第59-61页
        4.3.2 Non-rigid Complying Mode第61页
        4.3.3 Basic Folding Element I and II第61-63页
        4.3.4 Basic Folding Element III and IV第63-64页
        4.3.5 Theoretical Mean Crushing Force第64-66页
    4.4 Summary第66-68页
CHAPTER 5 THE WATERBOMB ORIGAMI TUBE第68-86页
    5.1 Introduction of the Waterbomb Pattern第68-69页
    5.2 Geometrical Analysis of the Waterbomb Origami Tube第69-74页
        5.2.1 Pattern Geometry and Assumptions第69-71页
        5.2.2 Conditions for a Rigidly Foldable Tube of a Uniform Radius第71-73页
        5.2.3 Creation of a Tube by Rigid Folding from a Flat Sheet第73-74页
    5.3 Kinematic Analysis Review of the Waterbomb Origami Tube第74-79页
        5.3.1 The Waterbomb Origami Tube When m is Odd第74-77页
        5.3.2 The Waterbomb Origami Tube When m is Even第77-79页
    5.4 Numerical Analysis of the Waterbomb Origami Tube第79-85页
        5.4.1 The Mechanism Mode第79-81页
        5.4.2 The Mechanism-Structure-Mechanism Transition第81-85页
    5.5 Summary第85-86页
CHAPTER 6 ANALYSIS OF CROSS FOLDING A SURFACE第86-103页
    61 Modelling in ABAQUS第86-89页
        6.1.1 Folding Scheme第86-87页
        6.1.2 Loading methods and Boundary Conditions第87-88页
        6.1.3 Material Properties and ABAQUS Setting第88-89页
    6.2 Positions of Controlling Rigid Bodies and Curvature第89-91页
        6.2.1 Deformed Shape after Step 1第89-90页
        6.2.2 Deformed Shape after Step 2 Folding第90-91页
    6.3 Mechanical Analysis第91-96页
        6.3.1 Study of the Thin Surface after the First Folding (Step 1)第94-95页
        6.3.2 Study of the Thin Sheet after the Second Folding (Step 2)第95-96页
    6.4 The Effects of Shell Thickness第96-100页
        6.4.1 Deformed Shapes and Shell Thickness第97-99页
        6.4.2 Elastic strain energy along the defined path and shell thickness第99-100页
    6.5 Peak Stress Relieve Methods第100-103页
        6.5.1 Central Hole Method第100-101页
        6.5.2 Slit Method第101-103页
CHAPTER 7 FINAL REMARKS第103-105页
    7.1 Main Achievements第103页
    7.2 Future Works第103-105页
REFERENCES第105-109页
发表论文和参加科研情况说明第109-110页
ACKNOWLEDGEMENTS第110-111页

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