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轴向加压剪切的变形分析
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英文标题：Analysis of Deformation in Cropping under Axial Load |
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作者：陈明安 |
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单位： 湖南大学 |
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关键词：轴向加压剪切 变形阶段 变形模式 弹塑性有限元 |
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分类号： |
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出版年,卷(期):页码：1993,18(2):11-15 |
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摘要：
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轴向加压剪切的变形过程包括:弹性变形阶段,早期集中塑性剪切阶段和狭窄剪切带内集中变形阶段。材料的分离由两种不同的变形模式实现,一种对应于剪切过程的第二阶段;另一种对应于剪切过程的第三阶段,它以狭窄剪切形变带为特征。前者决定了剪切件的几何精度,而后者则决定了剪切分离面的质量。弹塑性有限元计算结果还表明:轴向压力和轴向间隙明显影响剪切变形过程和材料的变形行为,从而影响剪切件质量。这些与实验结果相符合。
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Cropping under axial load consists of three deformation stages., elastic deformation, elary concentration of shearing deformation and localization flow in narrow shear band. The process is composed of two kinds of deformation models, one corresponds to the second stages, and the other corresponds to the third stages and show distinguishing feature of narrow shear deformation band. The geometrical precision of cropped billets and the quality of cropped surface are dependent on the former and the latter madels respectively. Results of elastoplastic FEM show that axial pressure and axial clearance have obvious effects on deformation process and deformation models of materials in cropping, and furthermore on the quality of cropped billets. These mentioned above are consistent with experimental results.
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作者简介：
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参考文献：
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[1] M、K、Das and Z、T. Sadollah, 20th Int、MTDR. Conf、Birmingham, 1979: 195 202．
[2] R. Lawson, Metallurgia and Metal Forming, Feb, 1976: 40-46．
[3] M. K. Das, Metallurgia, Dec. 1980: 646-655．
[4] Chen Jinde, et al, 22nd Int. MTDR. Conf, Manchester, 1981: 489-496．
[5] Chen Jinde, etal, 24th Int. MTDR. Conf, Manchester, 1983: 119-124．
[6] Chen Jinde, Chen Mingan, Proc. 3rd Sino-Japan Sym. on cold Forging, Bejing, 1990: 33-36．
[7] 陈金德,除明安,西安交通大学学报;1990;24:53-61．
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