采用离散元法动态模拟了功能陶瓷材料的压制过程,分别分析了重力与微重力情况下,成型后素坯的颗粒分布、应力以及孔隙率等情况.结果显示:在重力情况下,不同粒径的颗粒分布不均匀,小粒径颗粒很大一部分集中在上冲附近,而微重力情况下,颗粒不均匀性明显减小;与此同时,与微重力情况相比,重力情况下坯体的应力分布梯度较大,靠近上冲模及下冲模处应力比中间部位应力大,而孔隙率分布梯度也较大.
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