本文選題：多軸應(yīng)力狀態(tài)　切入點(diǎn)：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(yīng)力三軸度值的方法,對(duì)缺口拉伸、純剪切、壓剪和單軸壓縮等多種應(yīng)力狀態(tài)下的材料試樣進(jìn)行計(jì)算。應(yīng)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(yīng)力狀態(tài)。最終擬合了兩種計(jì)及應(yīng)力三軸度損失的斷裂準(zhǔn)則,并通過Taylor桿撞擊試驗(yàn)進(jìn)行了仿真分析。結(jié)果表明:(1)艦用低碳鋼的斷裂應(yīng)變與應(yīng)力狀態(tài)密切相關(guān),且在不同的應(yīng)力三軸度區(qū)間差異較大;(2)考慮應(yīng)力三軸度影響的斷裂準(zhǔn)則能較好地預(yù)測(cè)船用低碳鋼材料在復(fù)雜應(yīng)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(xué)交通學(xué)院;海軍裝備研究院;
【基金】：國防基礎(chǔ)研究項(xiàng)目(B1420133057) 國家自然科學(xué)基金(11302259) 非線性力學(xué)國家重點(diǎn)試驗(yàn)室開放基金(LNM201505) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(2014-yb-20)
【分類號(hào)】：U668.2
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本文編號(hào)：1622474