本文關(guān)鍵詞：塑性強(qiáng)化材料輥式矯直力學(xué)行為研究　出處：《機(jī)械工程學(xué)報(bào)》2016年18期 　論文類型：期刊論文

  更多相關(guān)文章： 鋼板 矯直 塑性強(qiáng)化材料 應(yīng)力 彎曲

【摘要】：采用彈塑性彎曲理論與應(yīng)力線性疊加原則對(duì)塑性強(qiáng)化材料連續(xù)彈塑性彎曲過(guò)程力學(xué)行為進(jìn)行分析,考慮應(yīng)力傳遞效應(yīng)對(duì)矯直過(guò)程的影響,建立七輥輥式矯直機(jī)連續(xù)彈塑性彎曲矯直過(guò)程力學(xué)模型。通過(guò)對(duì)比試驗(yàn)結(jié)果及理論計(jì)算值,兩者偏差平均值在8%以內(nèi),驗(yàn)證了理論分析方法的正確性。利用該模型,對(duì)不同的矯直策略進(jìn)行分析。結(jié)果表明,大變形矯直策略殘余應(yīng)力與殘余曲率控制能力均強(qiáng)于小變形矯直策略;由于應(yīng)力傳遞效應(yīng)對(duì)矯直過(guò)程的影響,使得小變形矯直策略隨矯直過(guò)程的深入,殘余曲率并未向零點(diǎn)逐步收斂,而是在一定范圍內(nèi)波動(dòng);大變形矯直策略由于采用了逐步矯直的工藝設(shè)定思想,使其可以達(dá)到矯直的目的。這些分析結(jié)果為工業(yè)生產(chǎn)中矯直策略的選取提供了理論依據(jù)。
[Abstract]:The elastoplastic bending theory and the principle of linear superposition of stress are used to analyze the mechanical behavior of the continuous elastic-plastic bending process of plastic strengthened materials, and the effect of stress transfer effect on the straightening process is considered. The mechanical model of continuous elastic-plastic bending straightening process of seven-roll straightener is established. The average deviation between the two is less than 8% by comparing the experimental results and theoretical calculation values. The correctness of the theoretical analysis method is verified. Using this model, different straightening strategies are analyzed. The results show that the residual stress and curvature control ability of the large deformation straightening strategy is better than that of the small deformation straightening strategy. Due to the influence of stress transfer effect on the straightening process, the small deformation straightening strategy with the deepening of the straightening process, the residual curvature does not gradually converge to 00:00, but fluctuates in a certain range. The large deformation straightening strategy can achieve the purpose of straightening because of adopting the idea of step by step straightening technology. These results provide a theoretical basis for the selection of straightening strategy in industrial production.
【作者單位】： 北京科技大學(xué)高效軋制國(guó)家工程研究中心;機(jī)科發(fā)展科技股份有限公司;
【基金】：中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(FRF-IC-14-005) 北京市自然科學(xué)基金(3154035)資助項(xiàng)目
【分類號(hào)】：TG333.23
【正文快照】： 0前言*考慮到節(jié)能減排的需要,鋼材逐漸向高強(qiáng)方向發(fā)展。高強(qiáng)鋼板在生產(chǎn)過(guò)程中極易出現(xiàn)瓢曲或內(nèi)應(yīng)力不均,輥式矯直是改善鋼板質(zhì)量尤其是消除瓢曲和內(nèi)應(yīng)力的主要途徑。實(shí)現(xiàn)矯直的基礎(chǔ)是金屬材料在較大彈塑性彎曲變形條件下,不論原始彎曲程度有多大差別,在彈復(fù)后所殘留的彎曲差別

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相關(guān)期刊論文 前8條

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2 余同希,章亮熾;塑性彎曲成形的研究進(jìn)展[J];應(yīng)用科學(xué)學(xué)報(bào);1988年03期

3 官英平 ,趙軍;板料彈塑性彎曲應(yīng)力應(yīng)變中性層位置關(guān)系探討[J];塑性工程學(xué)報(bào);2002年02期

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本文編號(hào)：1373066