Effect of the Friction Coefficient on Large Strain Extrusion Machining

Effect of the Friction Coefficient on Large Strain Extrusion Machining
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摩擦系数对大应变挤压加工的影响

DOI:
10.4028/www.scientific.net/amm.273.138
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发表时间:
2013-01
期刊:
Applied Mechanics and Materials
影响因子:
--
通讯作者:
Qing Li
Qing Li
中科院分区:
其他
文献类型:
--
作者:
Ping Lin;Zichun Xie;Qing Li

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研究了摩擦系数对大应变挤压加工(LSEM)变形行为的影响。采用有限元程序进行有限元模拟,得到了不同摩擦系数下有效应变的一系列仿真结果。结果表明,LSEM可以通过改变摩擦系数产生不同的有效应变,从而制备出块状纳米结构材料。通过对切屑有效应变变化的分析表明,随着摩擦系数的增大,切屑的变形更加不均匀。所得结果可为以后的LSEM研究提供有价值的指导。
The present study focused on the influence of the friction coefficient on the deformation behavior in large strain extrusion machining (LSEM). A series of simulation results of effective strain were obtained under different friction coefficients by conducting finite element simulations with a FEM code. The results show that LSEM can produce different effective strains by changing the friction coefficients, thus enabling the fabrication of bulk nanostructured materials. An analysis of the variation of effective strain through the chip demonstrated that the chip deformed much more inhomogeneously when the friction coefficient became larger. The obtained results can offer valuable guidelines for later LSEM studies.
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