本文選題：鋁合金 + 線接觸�。� 參考：《西南交通大學》2014年碩士論文

【摘要】：微動磨損是指接觸表面由于小幅振動而產生的一種小位移磨損。微動磨損廣泛存在于航空航天、鐵路機車和核電工業(yè)等領域。微動主要的影響因素包括法向載荷、位移幅值、頻率、接觸形式、材料特性和表面粗糙度等。目前關于微動磨損研究主要是采取點接觸的方式,對線接觸的研究相對較少。線接觸形式廣泛存在于工程實際中,例如輪軸配合、齒輪嚙合及銷軸連接等。本論文研究5083鋁合金/35CrMo鋼在線接觸形式下的切向微動磨損行為。 本文的實驗主要是在電磁激振微動磨損試驗機上進行的,采用平面(5083鋁合金)/圓柱(35CrMo鋼)線接觸形式。在分析摩擦特性曲線和摩擦系數(shù)時變曲線的基礎上,研究了位移幅值和法向載荷對微動磨損的影響。試驗后對測試試樣的磨痕形貌、磨損量及剖面進行分析。最后建立有限元模型,研究5083鋁合金接觸面的應力狀態(tài),并分析了摩擦系數(shù)和夾緊力對應力的影響,進一步解釋了試驗現(xiàn)象。通過以上的工作,本論文主要獲得了以下幾個結論： 1.本研究獲得了5083鋁合金/35CrMo鋼接觸面在線接觸條件下微動磨損的運行狀態(tài)圖。在線接觸條件下,磨痕表面在部分滑移狀態(tài)下呈現(xiàn)不連續(xù)性,完全滑移狀態(tài)下磨痕中心比兩端嚴重。微觀形貌分析表明,5083鋁合金的磨損機制主要為磨粒磨損和剝層。 2.在相同法向載荷的條件下,磨損量(磨損體積、磨損率和平均磨損深度)隨著位移幅值的增加而增加。在相同位移幅值的條件下,磨損量隨著法向載荷的增加而減少。 3.通過有限元分析獲得了5083鋁合金微動磨損接觸面的應力狀態(tài)；接觸面的應力值隨著摩擦系數(shù)的增加而增加；夾緊力對接觸線方向上的應力分布影響較大。
[Abstract]:Fretting wear is a kind of small displacement wear caused by small vibration of contact surface. Fretting wear is widely used in aerospace, railway locomotive and nuclear power industry. The main factors affecting fretting include normal load, displacement amplitude, frequency, contact form, material characteristics and surface roughness. At present, the research on fretting wear is mainly by point contact, but less on linear contact. Linear contact is widely used in engineering practice, such as wheel shaft fit, gear engagement and pin shaft connection. The tangential fretting wear behavior of 5083 aluminum alloy / 35CrMo steel is studied in this paper. The experiment in this paper is mainly carried out on the electromagnetic excited vibration fretting wear tester. The linear contact form of plane 5083 aluminum alloy / cylindrical steel 35CrMo is adopted. Based on the analysis of friction characteristic curve and friction coefficient time-varying curve, the effects of displacement amplitude and normal load on fretting wear are studied. After the test, the wear trace morphology, wear amount and profile of the test sample were analyzed. Finally, the finite element model is established to study the stress state of 5083 aluminum alloy contact surface, and the effects of friction coefficient and clamping force on the stress are analyzed, and the experimental phenomenon is further explained. Through the above work, this paper mainly obtains the following conclusions: 1. In this paper, the running state diagram of fretting wear of 5083 aluminum alloy / 35CrMo steel is obtained under the condition of on-line contact. Under the condition of on-line contact, the wear scar surface is discontinuous in the partial slip state, and the wear mark center is more serious than the two ends in the complete slip state. The microstructure analysis shows that the wear mechanism of Zu 5083 aluminum alloy is mainly abrasive wear and delamination. 2. Under the same normal load, the wear amount (wear volume, wear rate and average wear depth) increases with the increase of displacement amplitude. Under the same displacement amplitude, the wear loss decreases with the increase of normal load. The stress state of fretting wear contact surface of 5083 aluminum alloy is obtained by finite element analysis. The stress value of contact surface increases with the increase of friction coefficient, and the stress distribution in contact line direction is greatly affected by clamping force.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TG146.21;TH117

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本文編號：2021945