複合材料輕型飛機的適墜性分析

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Title:	複合材料輕型飛機的適墜性分析
Other Titles:	The crashworthiness analysis of composite light aircraft
Authors:	林亜昀;Lin, Ya-Yun
Contributors:	淡江大學航空太空工程學系碩士班陳步偉;Chen, Pu-Woei
Keywords:	適墜性;有限元素法;輕航機;複合材料;crashworthiness;Finite Element;light aircraft;composites
Date:	2015
Issue Date:	2016-01-22 15:05:27 (UTC+8)
Abstract:	航空業的快速發展提供交通上莫大的便利，但在無法避免飛航事故發生的情況下，如何保障飛機上乘客的安全，是航空界最重要的議題。近年來複合材料在航太界的應用逐漸取代了許多傳統金屬材料。由於複合材料與金屬材料在特性上的差異，因此無法以過去金屬結構飛機的各種經驗來評估複合材料飛機結構的安全性，所以複合材料飛機的結構安全性是重要的研究方向。本研究運用有限元素軟體(Abaqus)探討金屬材料與不同複合材料輕航機機身結構的適墜性。本文使用Pro/ENGINEER建立STOL CH 701機身結構，材料分別為鋁合金、碳纖維複合材料(CFRP)、玻璃纖維複合材料(GFRP)以及高分子纖維複合材料(KFRP)。模擬之邊界條件為依據ASTM規範的1.3 墜撞速度與AGATE所訂定的30o墜撞角度，動態模擬以墜撞能量的輸出做為結果合理性判斷的依據。本研究根據MIL-STD-1290A所規定的座艙壓縮量在各方向的壓縮量不得超過15%的安全標準下，建立速度與角度的安全區域。CFRP與GFRP座艙整體安全區域分別高於鋁合金座艙38.56%與32.12%，KFRP座艙安全區域則略低於鋁合金座艙4.74%。整體座艙安全區域無論是改變角度或是改變速度，A斜樑都是關鍵的結構件。在四種不同機身材料中，CFRP做為座艙材料除了在Y方向撞擊時之變形量略高於鋁合金座艙之外，在墜撞時X方向與A方向的壓縮量都小於其他材料，而其整體座艙的安全性也都優於其他材料。 People pay more attention to aircraft because of the growth of aviation industry. In the past few years, metal materials be replaced by composite materials because of the advantages of composite materials. The flight accidents cannot be avoided, so it is an important issue to discuss the crashworthiness of composite aircraft. In this study we use finite element software, such as Abaqus to discuss the crashworthiness and the safety crash zone of the cockpit by using metal and composite materials. We used Pro/ENGINEER to build STOL CH 701 model and the materials used is aluminum, carbon fiber composite material, glass fiber composites and polymer fiber composites. The boundary conditions are 1.3 followed by ASTM, and 30o impact angle defined by AGATE. The result of dynamic simulation must conform 15% cockpit reducing rate which is define by MIL-STD-1290A. In this study the safety crash zone of the cockpit by CFRP and GFRP are higher than 38.56% and 32.12% that of aluminum alloy. The safety crash zone of KFRP is slightly lower than 4.74% that of aluminum alloy. The safety crash zone of the cockpit either change the angle or change the speed, A inclined beams are the key structural. In four different kinds of materials, the deformation of CFRP impact only the Y direction slightly higher than the deformation of aluminum alloy, and the X direction and A direction are lower than the deformation of any other materials. Also the whole safety crash zone of the cockpit by CFRP is better than the whole safety crash zone of the cockpit by other materials.
Appears in Collections:	[Graduate Institute & Department of Aerospace Engineering] Thesis

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