本文關鍵詞： 鋁合金 碳纖維板材 微小溝槽 內聚力模型 膠接　出處：《吉林大學》2017年碩士論文　論文類型：學位論文

【摘要】：隨著新型輕質材料在汽車、飛機和輪船等結構輕量化中的應用,采用傳統(tǒng)連接方式無法滿足金屬和非金屬的連接要求。膠接技術除具有良好的連接性能,且具有耐疲勞、耐電位腐蝕、能防腐以及優(yōu)異密封性能等優(yōu)點,因此將膠接技術用于異質材料粘接逐漸成為新的研究熱點。本文以鋁合金和CFRP粘接件為研究對象,對粘接工藝進行研究,主要研究內容和研究成果如下:(1)對粘接工藝中的粘接體表面處理、固化工藝、膠瘤等參數進行實驗研究,采用砂紙粗化鋁合金表面,能夠起到增加粘接面積和機械鎖固的作用,但膠粘劑浸潤效果較差,造成接頭粘接強度降低;確定最佳的固化溫度和時間,并對溢膠對粘接件的影響進行了研究,固化工藝對膠層轉化起到重要作用,實驗件膠層較薄,膠瘤的強化效果并不明顯。(2)利用內聚力有限元模擬光面及微溝槽表面鋁合金與CFRP接頭的粘接強度,微溝槽表面鋁合金對接頭起到粘接強化作用;沿搭接寬度方向溝槽膠層的應力分布相同,接頭粘接強度隨搭接寬度的增加呈線性增大;搭接長度對膠層整體應力影響明顯,而對端部的影響效果較小,且隨著搭接長度增加其比強度值降低,即剪切強度和搭接長度的比值減小;相比搭接長度,增加搭接寬度對接頭進行強化更加有效。(3)研究不同溝槽深度、寬度以及角度的表面微溝槽鋁合金與CFRP接頭粘接強度、粘接失效形貌,得出隨著溝槽深度、寬度的增加,粘接體非自由端剝離應力和剪切應力及粘接強度得到提高;當溝槽角度由水平方向轉到45°時,接頭應力分布均勻且粘接強度最大;當溝槽角度達到90°時,接頭應力局部集中明顯且粘接強度最弱。(4)研究表面帶有微溝槽的鋁合金用于Al/CFRP/Al三層板結構層間粘接強度和阻尼性能的影響。結果表明:微溝槽表面鋁合金做層板基體能有效強化層間粘接強度和對層板阻尼性能無消極作用。
[Abstract]:With the application of new lightweight materials in the light weight of automobile, aircraft and ship, the traditional connection method can not meet the requirements of metal and non-metal connection. And has the fatigue resistance, the potential corrosion resistance, the ability anticorrosion as well as the excellent sealing performance and so on. Therefore, adhesive bonding technology has gradually become a new research hotspot. In this paper, the bonding process of aluminum alloy and CFRP bonding parts is studied. The main research contents and research results are as follows: (1) the surface treatment, curing process, glue nodule and other parameters of bonding process are studied experimentally. Sand paper is used to roughen the surface of aluminum alloy. It can increase the adhesive area and mechanical locking, but the adhesive wetting effect is poor, resulting in the joint bonding strength decreased; The optimum curing temperature and time were determined, and the influence of the spills on the adhesive parts was studied. The curing process played an important role in the conversion of the adhesive layer, and the adhesive layer of the experimental part was thin. The bonding strength between smooth surface and micro-groove surface aluminum alloy and CFRP joint was simulated by cohesion finite element method, and the bonding strength of micro-groove surface aluminum alloy to the joint was enhanced. The stress distribution of the groove layer along the lap width is the same, and the bonding strength increases linearly with the increase of the lap width. The effect of lap length on the overall stress of the adhesive layer is obvious, but the effect on the end part is less, and the specific strength value decreases with the increase of the lap length, that is, the ratio of shear strength to lap length decreases. Compared with the lap length, it is more effective to strengthen the joints by increasing the lap width.) the bonding strength between the surface micro-groove aluminum alloy and CFRP joints with different groove depth, width and angle is studied. With the increase of groove depth and width, the non-free end peeling stress, shear stress and bonding strength of the adhesive are increased. When the groove angle is shifted from horizontal to 45 擄, the stress distribution of the joint is uniform and the bonding strength is the largest. When the groove angle reaches 90 擄. Joint local stress concentration is obvious and bonding strength is weakest. The effects of aluminum alloy with micro-grooves on the interlaminar bonding strength and damping properties of Al/CFRP/Al laminates were investigated. Aluminum alloy on the surface of micro-grooves can effectively strengthen the interlaminar bonding strength and has no negative effect on the damping properties of the laminates.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG496

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