本文選題：成卷 + 殘余應(yīng)力　； 參考：《鋼鐵》2017年05期

【摘要】：從不考慮材料冷作硬化(理想彈塑性體)與考慮冷作硬化(雙線性隨動(dòng)硬化)兩個(gè)方面對(duì)帶坯在成卷、開卷、展平、塑性彎曲及回彈過(guò)程中產(chǎn)生的應(yīng)力進(jìn)行了解析分析,獲得了冷彎殘余應(yīng)力沿厚度方向上的分布,隨后對(duì)比研究了考慮硬化與不考慮硬化對(duì)冷彎殘余應(yīng)力分布的影響,并將理論計(jì)算結(jié)果與實(shí)測(cè)殘余應(yīng)力進(jìn)行了對(duì)比。結(jié)果表明,理想彈塑性模型和硬化模型預(yù)測(cè)的殘余應(yīng)力分布形式幾乎一致;成卷上存在屈服時(shí),縱向殘余應(yīng)力由內(nèi)外表面向板厚中心方向呈非線性分布(成卷上無(wú)屈服時(shí)呈線性分布),橫向殘余應(yīng)力呈近似線性分布;在變形外區(qū)主要為殘余拉應(yīng)力(橫向殘余應(yīng)力在外側(cè)有極小部分受壓區(qū)),內(nèi)區(qū)主要為殘余壓應(yīng)力(橫向殘余應(yīng)力在內(nèi)側(cè)有極小部分受拉區(qū));橫、縱向殘余應(yīng)力最大值均在中性層位置;研究結(jié)果與試驗(yàn)測(cè)量結(jié)果基本一致。
[Abstract]:In this paper, the stress produced in the process of coiling, unwinding, flattening, plastic bending and springback is analytically analyzed from two aspects of cold work hardening (ideal elastoplastic body) and cold work hardening (bilinear following hardening), which do not consider the material cold work hardening (ideal elastoplastic body), in the process of forming, unwinding, flattening, plastic bending and springback. The distribution of cold bending residual stress along the thickness direction is obtained. Then the influence of hardening and not considering hardening on the distribution of cold bending residual stress is studied, and the theoretical results are compared with the measured residual stress. The results show that the distributions of residual stress predicted by the ideal elastic-plastic model and the hardening model are almost the same, and when there is yield on the roll, The longitudinal residual stress is nonlinearly distributed in the direction of the inner surface facing the thick center of the plate (linear distribution when there is no yield on the roll and approximately linear distribution of the transverse residual stress). In the outer region of deformation, the main residual tensile stress is residual tensile stress (lateral residual stress has a very small part of compressive area on the lateral side, and the inner region is mainly of residual compressive stress (transverse residual stress has a very small part of tensile zone on the inside; transverse, the lateral residual stress has a very small part in the inner part of the tension zone; The maximum values of longitudinal residual stress are in the neutral layer, and the results are in good agreement with the experimental results.
【作者單位】： 武漢科技大學(xué)鋼鐵冶金及資源利用省部共建教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：省部共建耐火材料與冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室青年基金資助項(xiàng)目(2014QN03)
【分類號(hào)】：TG301

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本文編號(hào)：1966396