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以上二下三多台面零件为例,利用Marc软件对二维多台阶粉末冶金零件的压制过程进行数值模拟.研究压制过程中压坯各个区域的相对密度变化和相对密度梯度的形成,得到密度分布曲线,对提高此类粉末冶金零件成型设计的合理性具有实际参考价值. 相似文献
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Different material properties leads to different metal fracture behaviors.Even if the powder material is composed of plastic metal,the fracture still does not show macroscopic plastic deformation characteristics if the material contains a large number of voids.Eight-node isoparametric elastic-plastic finite element method was used to simulate the tensile process of sintered powder material.By setting a number of voids in the analyzed metal cuboid,the initial density was taken into consideration.The material properties of the three-dimensional solid for the tensile simulation were defined with reference to the known pure iron material parameters,The load-displacement curves during elongation were obtained with a universal testing machine,and then the simulated curves were compared with the experimental results.The factors that cause the stress concentration and strength decrease were analyzed according to the simulated equivalent von Mises stress distribution. 相似文献
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1 INTRODUCTIONDiecompactionofpowderhasbeenusedincom ponentsmanufacturingindifferentfields[1~ 4 ] .Inen gineeringapplications ,greencom 相似文献
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