發(fā)布時間：2018-08-07 16:34

【摘要】：為了研究高溫條件下高強(qiáng)度螺栓預(yù)緊力的松弛特性,螺栓材料分別選用40Cr合金鋼和Ti-6Al-4V鈦合金。應(yīng)用ABAQUS有限元軟件建立裝配體模型,定義了材料的本構(gòu)模型和裝配體各部件之間的接觸,分析了常溫預(yù)緊力狀態(tài)下及高溫條件下螺栓的受力及變形。分析結(jié)果表明,在高溫條件下,Ti-6Al-4V鈦合金預(yù)緊力松弛現(xiàn)象明顯好于40Cr合金鋼,Ti-6Al-4V鈦合金高強(qiáng)度螺栓比40Cr合金鋼螺栓擁有更高的強(qiáng)度和更好的延展性。得出的結(jié)論可為高溫條件下高強(qiáng)度螺栓的材料選用提供理論依據(jù)。
[Abstract]:In order to study the relaxation characteristics of pretightening force of high strength bolts at high temperature, 40Cr alloy steel and Ti-6Al-4V titanium alloy were used as bolt materials. The ABAQUS finite element software is used to establish the assembly body model. The constitutive model of the material and the contact between the components of the assembly are defined, and the stress and deformation of the bolt under the condition of normal temperature preload and high temperature are analyzed. The results show that the pretension relaxation of Ti-6Al-4V titanium alloy at high temperature is better than that of Ti-6Al-4V titanium alloy bolt of 40Cr alloy steel. It has higher strength and better ductility than that of 40Cr alloy steel bolt. The conclusion can provide theoretical basis for material selection of high strength bolt under high temperature condition.
【作者單位】： 沈陽理工大學(xué);
【基金】：國家自然科學(xué)基金(51175353)
【分類號】：TH131.3

【參考文獻(xiàn)】

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本文編號：2170663