簡易檢索 / 詳目顯示

回結果列表
研究生： 燕新城
Yen, Hsing-Cheng
論文名稱： 以一內部曲面薄層強化之三明治板
A Sandwich Panel Stiffened with an Internal Curved Membrane
指導教授： 許書淵
Hsu, Su-Yuen
學位類別： 碩士
Master
系所名稱： 工學院 - 航空太空工程學系
Department of Aeronautics & Astronautics
論文出版年： 2022
畢業學年度： 110
語文別： 中文
論文頁數： 51
中文關鍵詞： 三明治板 、有限元素分析法 、損傷容限 、結構設計
外文關鍵詞： Sandwich Panel, Finite Element Method, Damage tolerance, Structural Design
相關次數： 點閱：96  下載：19 
分享至:
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報

    • 三明治板近年來在航空、航海、太空等大型載具上的運用越加廣泛。然而，雖然三明治板在完好情況下有極佳的勁度與強度，三明治板卻有幾項致命的缺點，包含剪力造成的芯材損壞、芯材內部損壞的不易察覺、芯材與面板的脫層風險等等，這些缺點導致三明治板在應用上仍然受到諸多的限制。
    因此本研究致力於提出一項設計，能有效改善上述缺點，以增加三明治板的應用廣度及其安全性。此設計的概念為，在不改變重量的前提下，在三明治板芯材內加入以纖維組成的曲面膜狀結構，運用此膜狀結構分擔芯材承受的剪力、減少整體結構形變，並提高結構損傷容限。本論文含有薄層強化三明治板及傳統三明治板在完整、脫層、芯材破壞三種情況下的應變、位移數值解必較，及完整狀態下的實驗數據比較。證實此薄層強化技術，可有效的提高三明治板的勁度及損傷容限。

    This research aims to propose an innovative design that can effectively increase the stiffness and strength of sandwich panels and thus enlarge the scope of application of sandwich structures. The proposed design involves a curved fiber-reinforced membrane, which is intended to share the shear load with the core material. One may allocate a portion of the face sheet materials of a conventional sandwich to an embedded curved sheet to construct a sandwich of the new design that is not heavier than the original conventional sandwich. Results of several finite-element analyses confirmed both stiffness and strength advantages of the new sandwich concept for three cases: pristine panels, panels with fully separated sheets, and panels with damaged cores that can only sustain loading in the thickness direction.

    目錄 摘要 .............................................................................................................................. I 誌謝 ............................................................................................................................ VI 目錄 ........................................................................................................................... VII 圖目錄 ....................................................................................................................... IIX 表目錄 ........................................................................................................................ XI 第一章 緒論 ................................................................................................................ 1 1.1 文獻回顧 ....................................................................................................... 1 1.1.1 三明治板簡介 ..................................................................................... 1 1.1.2 三明治板的優點 ................................................................................. 1 1.1.3 三明治板的缺點 ................................................................................. 2 1.2 研發動機與目的 ............................................................................................ 3 第二章 薄層強化技術 ................................................................................................. 4 2.1 設計理念 ....................................................................................................... 4 2.2 薄層強化結構原理 ........................................................................................ 5 第三章 完整狀態下傳統三明治板與薄層強化三明治板的比較 (Case 1) ................. 8 3.1 模型建立 ....................................................................................................... 8 3.1.1 構型 .................................................................................................... 8 3.1.2 材料性質........................................................................................... 10 3.1.3 受力及邊界條件 ............................................................................... 10 3.1.4 網格品質........................................................................................... 11 3.2 結果比較 ..................................................................................................... 12 3.2.1 位移比較........................................................................................... 12 3.2.2 應變比較........................................................................................... 14 第四章 脫層狀態下傳統三明治板與薄層強化三明治板的比較(Case 2) ................. 21 4.1 脫層簡介 ..................................................................................................... 21 4.2 模型建立 ..................................................................................................... 21 4.3 結果比較 ..................................................................................................... 23 4.3.1 位移比較........................................................................................... 23 4.3.2 芯材應變........................................................................................... 26 4.3.3 芯材接觸壓力 ................................................................................... 29 4.3.4 面板與薄層應變 ............................................................................... 30 第五章 芯材斷裂下傳統三明治板與薄層強化三明治板的比較(Case 3) ................. 33 5.1 芯材斷裂情況簡介 ...................................................................................... 33 5.2 模型建立 ..................................................................................................... 34 5.3 結果比較 ..................................................................................................... 34 5.3.1 位移比較........................................................................................... 34 5.3.2 芯材應變........................................................................................... 35 5.3.3 面板及薄層應變 ............................................................................... 39 第六章 結論 .............................................................................................................. 42 附錄 － 結構實施例 ................................................................................................. 44 1 製程................................................................................................................ 44 1.1 構型 ..................................................................................................... 44 1.2 VARTM 製程 ........................................................................................ 45 2 實驗設置 ........................................................................................................ 46 3 結果比較 ........................................................................................................ 47 3 實施例結論 .................................................................................................... 50 參考資料 ................................................................................................................... 51

    1. Dan Zenkert, The Handbook of Sandwich Construction, pp. 3, 1997.
    2. Danw C. Jegley, Alexander Velicli,” Development of the PRSEUS Multi-Bay Pressure Box for a Hybrid Wing Body Vehicle,” 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Kissimmee, Florida, January 5-9, AIAA 1871-2015, 2015.
    3. R. Krueger, “Sandwich Structures Failure Modes and Their Prevention,” NESC Academy, 2016 (https://nescacademy.nasa.gov/video/0284e3f6685746b5879f5fd99773640a1d).
    4. Jianhu Shen, Guoxing Lu, Zhihua Wang, Longmao Zhao,” Experiments on curved sandwich panels under blast loading,” International Journal of Impact Engineering, Vol. 37, Issue 9, pp. 960-970, 2010.
    5. Bryan Smith, Biswajit Banerjee,” Reliability of inserts in sandwich composite panels,” Composite Structures, Vol. 94, Issue 3, pp. 820-829, 2012.
    6. [Online]Available:https://www.matweb.com/
    7. [Online]Available:https://www.jeccomposites.com/news/membrane-based-vartm-membrane-and-resin-interactions/

    下載圖示 校內：立即公開
    校外：立即公開
    QR CODE