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純鉬燒結(jié)體彈/塑性力學行為研究
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國家自然科學基金（50875072）；霍英東教育基金（121053）；安徽省自然科學基金（1308085JGD02）


Study on Elasto-plastic Mechanical Behavior for Sintered Pure Mo Powder
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    摘要:

    采用真空燒結(jié)技術制備了不同密度的鉬試樣，通過在MTS810試驗機上進行室溫準靜態(tài)單向壓縮試驗，研究了在不同的初始密度下，純鉬燒結(jié)體壓縮變形流變應力的變化規(guī)律。建立了流變應力的數(shù)學模型以及彈/塑性參數(shù)的計算模型?；诳蓧嚎s連續(xù)體的屈服準則和塑性本構(gòu)關系，確定了純鉬燒結(jié)材料壓縮變形的屈服條件及其彈/塑性本構(gòu)關系。

    Abstract:

    Mo specimens with different initial relative density were prepared by a vacuum sintering technique. The effects of the initial relative density on the flow stress of the sintered Mo powder were studied by room temperature quasi-static uniaxial compression tests at a MTS810 universal material testing machine. The mathematic model of the flow stress and the calculation model of the elasto-plastic parameters for the sintered Mo powder were established. Based on the yield criterion and plastic constitutive equation for compressible dense materials, the yield function and the elasto-plastic constitutive model of the sintered Mo powder during compression deformation was determined.

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李 萍,薛克敏.純鉬燒結(jié)體彈/塑性力學行為研究[J].稀有金屬材料與工程,2013,42(4):805~808.[Li Ping, Xue Kemin. Study on Elasto-plastic Mechanical Behavior for Sintered Pure Mo Powder[J]. Rare Metal Materials and Engineering,2013,42(4):805~808.]
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  • 收稿日期:2012-04-28
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