Numerical study of the friction effects on the metal flow under local loading way
Numerical study of the friction effects on the metal flow under local loading way
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DOI：
10.1007/s00170-013-4925-x
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发表时间：
2013-04
期刊：
影响因子：
--
通讯作者：
Dawei Zhang;He Yang
中科院分区：
文献类型：
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作者：
Dawei Zhang;He Yang
摩擦在金属体积成形过程中起着重要的作用。特别是在局部加载过程中，它对金属流动有着重要的影响。采用解析法、数值模拟和实验相结合的方法，分析了摩擦力对筋腹式构件局部加载成形过程中金属流动的影响。采用常剪摩擦模型进行分析和数值模拟。进行了两种不同形状坯料的局部加载试验。研究结果表明：局部加载状态下，增大摩擦系数有利于减少或避免剪切变形行为的发生;摩擦系数增大，流入肋腔的金属量增加;局部加载宽度增大或变厚区厚度差减小，摩擦效应减小。
Friction plays an important role in bulk metal-forming process. Especially, it has an important influence on metal flow in the local loading process. In the present study, the influence of friction on the metal flow in local loading forming process of rib-web component was analyzed by using analytical method, numerical simulation, and experiment. Constant shear friction model was employed in the analytical analysis and numerical simulation. Two kinds of local loading experiment were carried out, which differ in the shape of billet. The results in the present study indicated that (a) in local loading state, increasing friction is beneficial to reduce or avoid the occurrence of shearing deformation behavior; (b) the metal flowing into rib cavity would increase if friction factor increases; (c) as the width of local loading increases or thickness difference of variable-thickness region decreases, the friction effect will reduce.