A Study on the Yield Criterion of Metal Powders

금속 분말의 항복조건에 관한 연구

  • 박성준 (서울대학교 재료공학부) ;
  • 한흥남 (신소재 박막가공 및 결정성장 연구센타) ;
  • 오규환 (서울대학교 재료공학부) ;
  • 이동녕 (서울대학교 재료공학부)
  • Published : 1996.10.01

Abstract

A new yield criterion for metal powder compaction based on continuum mechanics has been proposed. It includes three parameters to characterize the geometrical hardening of powder compact and strain hardening of incompressible metal matrix. The elasto-plastic finite element method to describe compaction of metal powders has been formulated using the new yield criterion. The values of parameters in the yield criterion can be determined using cold isostatic pressing(CIP). The finite element method can simulate compaction behavior of various copper powders.

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