Stresses State and Mechanical Behaviors of the Green Body During Die Compaction and Ejection Process

作     者：S.M.Wang Y.Wang Y.X.Wang F.P.Liu J.Cao S.M.Wang;Y.Wang;Y.X.Wang;F.P.Liu;J.Cao

作者机构：Department of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin 15001China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2020年第33卷第4期

页      面：605-614页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：The authors gratefully acknowledge the financial supports of State Key Lab of Advanced Welding and Joining Harbin Institute of Technology(Nos.AWJ-19Z05) 

主　　题：Powder compaction Finite element simulation Stress history Cap model Green body 

摘      要：Finite element simulations for metal powder compaction of a clutch plate were performed to examine the stresses during compaction,unloading,and *** describe the mechanical behavior of compacted green body,a modified densitydependent Drucker-Prager Cap model was utilized to predict the stress and density distribution of the compacted clutch plate during loading and ejection *** results indicate that maximum tensile principal stress was a main driving force for the tensile crack initiation during ejection stage,and shear stress may be another driving force in both compaction and ejection stages for shear crack *** were peak value of the stresses during ejection stage,and the stresses are in compressive state only during compaction ***,the tensile crack initiation is not possible during compaction except shear *** stress in the clutch plate is of less contribution to the crack initiation during compaction,unloading and *** of criteria of the crack initiation and fracture is necessary in order to obtain uniform density and crackfree components in the manufacturing of metal powder compaction.