Design of Thickness of the Composite and Liner for Structure Safety of Type 4 Pressure Vessel = Type 4 압력용기의 구조안전을 위한 복합재 두께 및 라이너 설계

다국어 초록 (Multilingual Abstract)

Due to the problem of fossil fuel exhaustion and environmental pollution, the use of hydrogen fuel is increasing gradually, so there has been a trend of development and commercialization of hydrogen fuel cell vehicles. In order to increase the fuel efficiency of a hydrogen fuel cell vehicle, a lightweight and high-pressure design of a hydrogen storage container is required. Therefore, it is necessary to optimize the shape of the pressure vessel and the thickness of the composite material.
In this paper, the head part satisfying the structural safety is designed by using the iso- tensiod curve, and the aluminum alloy boss part is optimized by using ANSYS Design Exploration tool to reduce its stress. In addition, based on the designed liner shape, ACP (ANSYS Composite Pre-process & Post-process) software was used to establish the composite finite element model with varying winding angles and thicknesses depending on the shape of the head, and optimized composite material thickness to satisfy the structural safety of type 4 pressure vessel.

목차 (Table of Contents)

• CONTENTS i
• Nomenclature ii
• List of Figures iii
• List of Tables v
• 1. Introduction 1
• 2. Design of iso-tensoid head 4
• 2.1 Iso-tensoid head theory 4
• 2.2 Inflection point of the iso-tensoid curve 9
• 2.3 Finite element analysis verification 14
• 3. Composite material design 17
• 3.1 Netting theory 17
• 3.2 Failure criterion of composite materials 23
• 3.3 ACP Modeling 24
• 4. Finite element model of liner 29
• 4.1 Modeling of liner 29
• 5. Optimum design of composite pressure vessel 31
• 5.1 Optimum design of the liner 32
• 5.2 Optimum design of the composite 37
• 6. Conclusion 40
• Reference 41
• Acknowledgement 45