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Abstract：
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Analytical formula of upper bound extrusion force of the cylindrical specimen in process of equal channel angular pressing(ECAP) was obtained by the upper-bound theorem, and the equal channel angular extrusion test and finite element simulation of pure copper cylinder specimens were carried out. Then, the upper bound extrusion force formula of ECAP process was verified by experiments and finite element simulation. The results show that the calculated results of analytical formula, the simulation value and the experimental value are similar, which indicates that analytical formula has a certain accuracy. In addition, the ECAP process of pure copper cylindrical specimens with different radiuses and different lengths is simulated by finite element software ABAQUS, and the influences of specimen radius and sample length on the upper-bound extrusion force are discussed by combining with theoretical analytic formula. The results show that the radius and length of the cylindrical specimen are positively related to the ECAP extrusion force. But, for the specimen with radius greater than 4 mm, the finite element simulation results are larger than that of the analytical formula, and the difference increases with the increase of radius.
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Funds：
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现代汽车零部件技术湖北省重点实验室开放基金资助项目(2013-06)
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AuthorIntro：
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左治江（1974-），男，博士，教授
E-mail：dongfc2001@sohu.com
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Reference：
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