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首页> 外文期刊>Mechanics Based Design of Structures and Machines: An International Journal >In-Plane Strain Solution of Stress and Defects of Tube Bending with Exponential Hardening Law
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In-Plane Strain Solution of Stress and Defects of Tube Bending with Exponential Hardening Law

机译:平面应变的应力和管弯曲缺陷的平面应变解

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摘要

Approximate equations are derived based upon in-plane strain assumption in tube bending with exponential hardening law to provide quantitative methods for predicting stresses in different directions, Von Mises stress, neutral layer (NL) shift, wall thickness variation, and cross section flattening under rotary draw bending. It was revealed that calculated values of stresses are positively correlated with strength coefficient and negatively correlated with ratio of centerline radius (CLR) to diameter. The amount of the NL shift is directly proportional to the amount of wall thickness thinning at the extrados of tube and inversely proportional to the ratio of CLR to diameter. The strain weakening effect caused by deformation transfer leads to gradual reduction of wall thickness variation from the bent portion to the unbent portion. What is more, wall thickness variation may also have a significant influence on cross section flattening.View full textDownload full textKeywordsDefects, FE simulation, In-plane strain, Tube bending, Von Mises stressRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/15397734.2012.660617
机译:近似方程是基于管弯曲中的平面应变假设和指数硬化定律得出的,以提供定量方法来预测不同方向上的应力,冯·米塞斯应力,中性层(NL)位移,壁厚变化和旋转时的横截面变平弯曲。结果表明,应力的计算值与强度系数正相关,而与中心线半径(CLR)与直径之比则负相关。 NL偏移量与管子外表面处的壁厚变薄量成正比,与CLR与直径之比成反比。由变形传递引起的应变减弱作用导致从弯曲部分到未弯曲部分的壁厚变化逐渐减小。此外,壁厚的变化也可能对横截面的扁平化有很大影响。查看全文下载全文关键字缺陷,有限元模拟,平面应变,管弯曲,冯·米塞斯应力相关var addthis_config = {ui_cobrand:“泰勒和弗朗西斯在线” ,services_compact:“ citeulike,netvibes,twitter,technorati,美味,linkedin,facebook,stumbleupon,digg,google,更多”,发布号:“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/15397734.2012.660617

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