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《Journal of Materials Science and Engineering》 2014-01
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A Modified Yield Function for Sintered Powder Material during Uniaxial Compression Process

LIN Qi-quan;PENG Chuan-dong;DONG Wen-zheng;Schoo1of Mechanical Engineering,Xiangtan University;  
In our present work,a more accurate relationship between Possion's ratio and relative density was derived theoretically,and then a new flow stress model of sintered powder was proposed according to Shima theory.Based on the new flow stress model,a modified yield function was established to describe the mechanical property of sintered powder under uniaxial compression process.As a result,the modified yield function gives a calculating accuracy higher than other yield functions in comparison with experimental results.
【Fund】: 科技部国际合作资助项目(2010DFA52130 2012DFG70640);; 国家自然科学基金资助项目(51175445);; 湖南省科研创新资助项目(CX2013B277)
【CateGory Index】: TF121
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