汽車輪胎螺栓失效模式分析：以某汽車的輪胎螺栓為分析對象，建立了其失效模式的分析流程，從失效模式的形貌特征開始，通過實驗檢測材料的化學成分分析、金相分析其內部的組織結構，再對輪胎螺栓進行掃描電鏡觀察斷口的微觀形貌，根據分析結果找出輪胎螺栓斷裂的原因。對防止輪胎螺栓斷裂提出了建議，指導生產及質量控制。
關鍵詞： 輪胎螺栓； 失效； 氫裂
中圖分類號：TG379
Finite element analysis of AZ91 magnesium during equal channel angular pressing process
Zhong Bing
(College of Mechanical Engineering, Linyi University, Linyi 276005, China)
Abstract: The equal channel angular pressing 3D model of AZ91 magnesium was set up. Effect of the temperature and friction factors on the effective strain and load-stroke were simulated using DEFORM-3D finite element analysis software. The results show that the deformation zone is mainly located around the cross area of the two channels. With temperature increasing, the maximum value of load-stroke during ECAP process decreases. The higher the friction factor, the larger the gradient of the effective strain, the lower the homogeneity of plastic deformation.
Key words: equal channel angular pressing; finite element simulation; AZ91 magnesium alloy
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