碳纖維/環氧樹脂預浸材疊層熱壓成型機械性質探討之研究

Study on Mechanical Properties of Thermoformed Carbon Fiber/Epoxy Prepreg Laminates

陳佳駿(Chia-Chun Chen)

指導教授 ： 陳夏宗

中原大學/工學院/機械工程研究所/碩士(2016年)

https://doi.org/10.6840/cycu201600692

摘要

近年來，複合材料廣泛運用於3C產品與航空工業中，主要原因在於複合材料具有優異的特性，如高強度、質量輕、耐磨耗及耐腐蝕性等等的特性。因應目前重視的環保課題，將其應用於飛機結構上，可以比常規金屬減重20~30%，連帶著影響飛機的燃油成本，所以目前在航空業中非常關注碳纖維複合材料應用及研究。
本論文先以熱壓成型不同參數包括成型溫度、成型壓力及成型時間的條件變化，對碳纖維/環氧樹脂預浸材疊層熱壓成型經由硬度試驗探討出一個最佳成型參數。再針對不同的纖維角度做疊層熱壓成型探討其機械性質，分別對[0°/90°/0°/90°]S、[45°/-45°]2S及[0°/90°/45°/-45°]S這三種疊層做拉伸試驗探討其強度差別，最後再由最佳疊層設計在外觀面各增加一層編織布並和[0°/90°/0°/90°/45°/-45°]S此疊層做拉伸強度及彎曲試驗，就能探討出編織布強度較強還是UD布強度較強。最後就用ANSYS Workbench中ACP複材模組探討各疊層的應力集中區域在哪，並和實驗做驗證。
本論文研究顯示，在熱壓成型製成參數比較中，得知當溫度為150℃、壓力為5kg/cm2以及成型時間為60分鐘時，所測得試片硬度會較高；在不同纖維角度疊層方面，以應用方面來說，需要在試片每個角度做拉伸都能得到較均一的強度，則以[0°/90°/45°/-45°]S疊層為較佳之疊層；最後再以[0°/90°/45°/-45°]S此疊層在外層各添加3K編織布與[0°]、[90°]UD布後之疊層，發現強度不管是拉伸還是彎曲都是以多添加UD(Unit Direction)布的疊層強度較強，且得知編織布的強度較UD布弱，所以編織布通常為美化產品外觀所使用，產品強度是由內部UD布做不同角度疊層增加之。

關鍵字

預浸材 ； 熱壓成型 ； 機械性質

並列摘要

In recent years, composite materials are widely used in 3C products and the aviation industry, the main reason is that the composite material has excellent properties such as high strength, light weight, abrasion and corrosion resistance properties and so on. In response to the current emphasis on environmental issues, on which applied to the aircraft structure, the weight loss of 20 to 30% less than conventional metal, even with the impact of the cost of aircraft fuel, so now in the aviation industry is very concerned about carbon fiber composite materials research and application.
First part to different parameters including thermoforming molding temperature, molding pressure and molding time conditions change, carbon fiber / epoxy prepreg material laminated thermoforming investigate an optimum molding parameters via the hardness test. Do it again for different fiber angles laminate thermoforming investigate its mechanical properties, respectively [0°/90°/0°/90°]S, [45°/-45°]2S and [0°/90°/45°/-45°]S three laminate tensile test to investigate the difference in the intensity. And than from the best design in the appearance of the laminate surface and each additional layer of woven and [0°/90°/0°/90°/45°/-45°]S do their laminate tensile strength and the bending test, the strength will be able to investigate a strong woven fabrics or unit direction fabric greater intensity. Finally explore the stress concentration area in each stack with which the ACP Composites ANSYS Workbench modules, and to do the experiment and verification.
This thesis result shows that in the thermoforming parameters comparison ,made on the temperature is 150℃, pressure of 5kg/cm2 and a molding time of 60 minutes, the measured hardness test will be higher. In different fiber angles laminate regard to applications, in applications, need to do the test for each angle can get more uniform tensile strength, find the [0°/90°/45°/-45°]S laminate is the preferred laminate. Final used the [0°/90°/45°/-45°]S laminate at outer layers added 3K woven and [0°]、[90°] unit direction fabric, the strength was found either are stretched or bent in order to add more unit direction fabric strong than laminated add the woven fabric, so woven usually used to beautify the appearance of the product. The internal strength of the product is made unit direction fabric laminated different angles of the increase.

並列關鍵字

Prepreg material ； Thermoforming ； Mechanical properties

參考文獻

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