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Abstract：
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The void closure in different positions of forgings was simulated by the finite element method when the friction factors were 0.3, 0.5 and 0.7, and the change laws of void height in different positions of forgings under different friction factors were analyzed. The result show that the inner voids are easier to close than the edge voids, the closing speed of the inner voids increases with the increasing of friction factor, and the closing speed of the edge voids slows down. By analyzing the relationship among friction factor, hydrostatic stress, equivalent strain and closing speed of voids, it is found that in the internal position of forgings, with the increasing of friction factor, the absolute value of hydrostatic stress increases, the effective strain increases, and the closing speed of voids increases. At the edge of forgings, with the increasing of friction factor, the effective strain decreases, and the closing speed of voids decreases. Thus, the influence of the increased friction factor on the void closure and the equivalent strain at the edge position of forgings is greater than that in the center of forgings.
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Funds：
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山西省自然科学基金重点基金资助项目（201601D011002）
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AuthorIntro：
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秦敏（1980-），女，博士研究生，讲师，E-mail：wsqm2008@163.com；通讯作者：刘建生（1958-），男，博士，教授，博士生导师，E-mail：jiansliu@163.com
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Reference：
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