本文選題：多軸應力狀態(tài)　切入點：船用鋼　出處：《中國造船》2016年03期 　論文類型：期刊論文

【摘要】：基于有限元修正的平均應力三軸度值的方法,對缺口拉伸、純剪切、壓剪和單軸壓縮等多種應力狀態(tài)下的材料試樣進行計算。應力三軸度從-0.33到1.33,涉及壓縮、壓剪、剪切、拉伸、多軸拉伸等多軸應力狀態(tài)。最終擬合了兩種計及應力三軸度損失的斷裂準則,并通過Taylor桿撞擊試驗進行了仿真分析。結(jié)果表明:(1)艦用低碳鋼的斷裂應變與應力狀態(tài)密切相關(guān),且在不同的應力三軸度區(qū)間差異較大;(2)考慮應力三軸度影響的斷裂準則能較好地預測船用低碳鋼材料在復雜應力狀態(tài)下的斷裂行為。
[Abstract]:The average stress correction finite element method of three axis value based on notch tensile, shear, shear and uniaxial compression and other materials should be under stress of stress calculation. Three axis from -0.33 to 1.33, involving compression, shear, shear, tensile, multiaxial stretching etc. multi axial stress state. The final fitting two meter and three axis force fracture criterion of loss, and the simulation analysis is carried out through the Taylor bar impact test. The results showed that: (1) ship breaking strain of low carbon steel is closely related to the stress state, and the three axis force interval difference should be different the larger; (2) considering the effect of stress fracture criterion three axis can better predict the marine low carbon steel materials in the complex stress fracture behavior under stress.

【作者單位】： 武漢理工大學交通學院;海軍裝備研究院;
【基金】：國防基礎研究項目(B1420133057) 國家自然科學基金(11302259) 非線性力學國家重點試驗室開放基金(LNM201505) 中央高�；究蒲袠I(yè)務費專項資金(2014-yb-20)
【分類號】：U668.2
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本文編號：1622474