本文選題：碳纖維　切入點：傳動軸　出處：《武漢理工大學》2012年碩士論文

【摘要】：碳纖維復合材料傳動軸不僅質量輕,具有很好的耐疲勞性和耐腐蝕性,而且噪聲小、震動衰減性好、安全性好,特別適用于大型重載傳動軸。碳纖維復合材料傳動軸根據(jù)結構形式可以分為整體型和裝配型兩類。整體型結構可以采用短切纖維注塑成型或采用連續(xù)纖維編織固化成型；裝配型即傳動軸由兩個以上構件通過連接裝配成一個整體。裝配型傳動軸由于其工藝簡單,且力學性能好被廣泛使用。本文主要研究裝配型碳纖維復合材料傳動軸的設計。 裝配型傳動軸一般由金屬構件和碳纖維管連接而成,金屬構件和碳纖維管的連接對裝配型傳動軸的性能至關重要,因此連接設計是本論文研究重點之一。本文分析了復合材料與金屬常用的連接方式及特點,并對混合連接(既有膠連接又有機械連接)的傳動軸進行了設計計算。根據(jù)膠連接的經(jīng)驗公式和ANSYS分析結果確定了膠連接的套合長度,并對膠的剪切強度進行了校核。機械連接使用螺釘連接,對螺釘?shù)闹睆�、邊距、間距,行距分別做了計算和校核,達到了傳動軸扭轉強度的要求。 碳纖維管的設計是論文的另一個研究重點。碳纖維管的設計方法上與傳統(tǒng)金屬軸不同,碳纖維管結構設計包含了材料設計,如組分材料和鋪層方向等。碳纖維管一般為薄壁圓管構件,也可以看作是一種層合板結構件,其鋪層設計沿用層合板的設計理論。傳動軸工作時主要承受扭矩,所以碳纖維管要有足夠的扭轉強度和扭轉剛度。本文中碳纖維管的結構設計主要包括鋪層角度、鋪層順序、鋪層厚度以及鋪層比例的設計。文中采用有限元軟件ANSYS及Tsai-Wu張量準則分析了不同的鋪層角度對軸的扭轉強度和扭轉剛度的影響。碳纖維復合材料的成型工藝中,纏繞成型工藝效率高,可使制品最大限度的獲得所要求的結構性能,故本文碳纖維試件采用纏繞成型工藝加工。結合ANSYS分析結果、纏繞成型工藝的特點和連接部位對鋪層比例的要求,最后確定了碳纖維管的結構參數(shù)。 為了驗證碳纖維復合材料傳動軸設計方法的準確性,加工了試驗件,并對試驗件進行了靜扭轉試驗和扭轉疲勞試驗,試驗結果與設計的碳纖維復合材料傳動軸的臨界破壞扭矩基本吻合。 本文的研究成果對纖維增強型復合材料傳動軸的設計有一定的參考價值。
[Abstract]:Carbon fiber composite transmission shaft not only has light weight, has good fatigue and corrosion resistance, but also has low noise, good vibration attenuation and good safety. Carbon fiber composite transmission shaft can be divided into integral type and assembly type according to the structural form. The integral structure can be moulded by short cut fiber injection molding or continuous fiber braided solidification molding. The assembly type is the drive shaft which is assembled into a whole by connecting more than two components. The assembly type drive shaft is widely used because of its simple technology and good mechanical properties. This paper mainly studies the design of the assembled carbon fiber composite transmission shaft. Assembly drive shafts are usually connected by metal components and carbon fiber tubes, and the connection between metal members and carbon fiber tubes is crucial to the performance of the assembled transmission shafts. Therefore, the joint design is one of the key points in this paper. The design and calculation of the drive shaft of the hybrid connection (both glue connection and mechanical connection) are carried out. According to the empirical formula of the adhesive connection and the ANSYS analysis result, the sleeve length of the rubber joint is determined. The shear strength of the adhesive is checked. The screw connection is used in the mechanical connection. The diameter, margin, spacing and row spacing of the screw are calculated and checked, respectively, which meet the requirements of torsional strength of the drive shaft. The design of carbon fiber tube is another important point in this paper. The design method of carbon fiber tube is different from that of traditional metal axis. The structural design of carbon fiber tube includes material design. Carbon fiber tube is generally a thin-walled circular tube member, and can also be regarded as a laminated plate member. The laminated design follows the design theory of laminated plate, and the driving shaft is mainly subjected to torque when it works. Therefore, carbon fiber tube should have enough torsional strength and torsional stiffness. In this paper, the structural design of carbon fiber tube mainly includes layer angle, layer sequence, The influence of different layer angles on the torsional strength and stiffness of shaft is analyzed by using the finite element software ANSYS and Tsai-Wu Zhang Liang criterion. Because of the high efficiency of the winding forming process, the products can obtain the required structural properties to the maximum extent. Therefore, the carbon fiber specimen in this paper is processed by the winding molding process. Combined with the results of ANSYS analysis, The characteristics of the winding forming process and the requirements of the joint position for the coating ratio are determined. Finally, the structural parameters of the carbon fiber tube are determined. In order to verify the accuracy of the design method of the transmission shaft of carbon fiber composite material, the test piece was machined, and the static torsion test and torsional fatigue test were carried out on the test piece. The experimental results are in good agreement with the critical failure torque of the CFRP transmission shaft. The research results in this paper have some reference value for the design of fiber reinforced composite shaft.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH133.2

【引證文獻】

相關碩士學位論文 前2條

1 鈕嘉穎;碳纖維機床傳動軸的彎扭性能研究[D];武漢理工大學;2013年

2 章瑩;連接形狀對碳纖維傳動軸扭轉性能的影響[D];武漢理工大學;2013年

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本文編號：1700222