Densification Analysis for SiC Powder under Cold Compaction

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J. Korean Ceram. Soc. > Volume 37(6); 2000 > Article

Journal of the Korean Ceramic Society 2000;37(6): 589.

냉간압축 하에서 실리콘 카바이드 분말의 치밀화해석

박환, 김기태¹

포항공과대학교 기계공학과 대학원
¹포항공과대학교 기계공학과

Densification Analysis for SiC Powder under Cold Compaction

ABSTRACT

Densification behavior of SiC powder was investigated under cold compaction. A special form of the Cap model was proposed from experimental data of SiC powder under triaxial compression. To compare with experimental data of SiC powder under cold compaction, the proposed constitutive model was implemented into a finite element program (ABAQUS). Finite element calculations from the Cam-Clay model and the modified Drucker-Prager model were also compared with experimental data of SiC powder. The agreements between experimental data and finite element results obtained from the proposed constitutive model are reasonably good. In die pressing, finite element results obtained from the Cam-Clay model and the modified Drucker-Prager model, however, show lower average density of SiC powder compacts compared to experimental data.

Key words: Cap model, Finite element analysis, Triaxial compression, Die pressing, Cold isostatic pressing