Minimum Weight Design and Manufacture of Laminated Composite Sandwich Shells 廖偉智、賴?民
E-mail: [email protected]
ABSTRACT
In order to make the composite shell achieve the goal of the high stiffness and weight-light, so this research developed the theory analysis on the composite sandwich shell component and molding technology. As for theory analysis, make use of 3D shell element of the multi-layer theory to analyze the mechanics behaviour of the composite sandwich shell component with different aspect ratio (B/A) , radius -to- length ratio (R/A) , side -to -thickness ratio (A/H) , boundary condition and various loading. In manufacturing, is put face materials and core materials in the mold to foaming forming the composite sandwich shell, the face materials is glass fiber composites or carbon fiber composites; the core materials is EVA630 which is light weight and made by single screw granulating machine or resin foam. Not only can less whole weight of structure, but also improve the resistance to bend and resistance to impact ability of composite sandwich shell structure. In the optimal design, this research uses the particle swarm optimization (PSO) algorithm for search optimal process parameters (orientation angle and thickness) of composite sandwich shell with different aspect ratio (B/A) , radius -to- length ratio (R/A) , side -to - thickness ratio (A/H) , boundary condition and various loading , in order to make the composite sandwich shell component reach the goal of maximum stiffness or minimum weight. Finally, verify the correct of the theory analysis and optimal design by the experimental data.
Keywords : Foam ; Composite ; Sandwich ; Shells structures ; Minimum weight design ; Stiffness ; Particle Swarm Optimization Table of Contents
封面內頁 簽名頁 授權書iii 中文摘要iv Abstract v 誌謝vi 目錄vii 圖目錄ix 表目錄xi 第一章 緒論1 1.1 研究背景與動機1 1.2 文 獻回顧2 1.3 研究目的3 第二章 基本理論5 2.1 多層殼元素理論5 2.2 有限元素模型之建立8 第三章 最佳化方法11 3.1 粒子群 最佳化演算法11 3.2 PSO最佳學習因子15 3.3 最佳機率公式16 3.4 最佳勁度設計16 3.5 輕量化設計 20 第四章 複合材料三明 治殼構件製作與實驗25 4.1 複合材料三明治殼構件製作25 4.1.1 面材之製作25 4.1.2 心材之製作26 4.1.2.1熱塑性發泡棉26 4.1.2.2發泡樹脂29 4.2 碳纖複合材料三明治殼構件成型30 4.2.1 採用熱塑性發泡棉30 4.2.2 採用發泡樹脂33 4.3 碳纖複合材料 三明治殼構件頂壓實驗34 4.4 懸臂樑實驗 40 第五章 結果與討論43 5.1 複合材料三明治殼構件的最大勁度設計43 5.2 複合材 料三明治殼構件的輕量化設計52 5.2.1 單曲率殼複合材料三明治殼構件之輕量化設計53 5.2.2 雙曲率複合材料三明治殼構件 之輕量化設計55 第六章 結論與未來發展方向59 6.1 結論59 6.2 未來發展方向60 參考文獻61
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