scholarly journals Estimation of Yield Surface on Iron Powder Compaction for Finite Element Analysis using Drucker-Prager Cap Model

2019 ◽  
Vol 501 ◽  
pp. 012021
Author(s):  
R Ogawa ◽  
T Yoshimura ◽  
N Yagi ◽  
K Mizuta ◽  
Y Taniguchi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Iron Powder ◽  
Yield Surface ◽  
Powder Compaction ◽  
Element Analysis ◽  
Cap Model

Assessment of the Twice-Yield Method for Elastic-Plastic Fatigue Analysis

2006 ◽  
Author(s):  
W. Reinhardt
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Yield Surface ◽  
Fatigue Analysis ◽  
Half Cycle ◽  
Proportional Loading ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Effective Yield ◽  
Von Mises

The twice-yield (2 Sy) method was proposed by Kalnins as a convenient method to perform an elastic-plastic fatigue analysis using Finite Element analysis. With this method, only a single loading half cycle needs to be run. However, since the shape of the effective yield surface used in this method deviates from the actual von Mises yield surface, the method may conceivably deviate from the solution obtained by elastic-plastic cycle-by-cycle analysis. This paper aims to evaluate the twice-yield method for elastic-plastic fatigue analysis, which is conventionally done cycle-by-cycle. It compares the predictions of plastic strain from the twice-yield method and cycle-by-cycle analysis using some generic examples with non-proportional loading histories as they are frequently encountered in practice.

Modeling and Simulation of Pharmaceutical Powder Compaction

2012 ◽  
Vol 217-219 ◽  
pp. 1403-1406
Author(s):  
Guo Ning Si ◽  
Chen Lan
Keyword(s):  
Finite Element ◽  
Friction Coefficient ◽  
Powder Compaction ◽  
The Finite Element Method ◽  
Compression Process ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Pharmaceutical Powder ◽  
Cap Model ◽  
Powder Compression

The finite element method was conducted to simulate the pharmaceutical powder compression process by using Drucker–Prager Cap model and elastic-plastic deformation theory. The effects of different friction coefficient on tablet property were systematically studied. The results show that the pressure-density curves shift towards right-hand side with slight decrease at smaller friction coefficient. The fluidity of powder remains the inverse decrease with the friction coefficient, and the density distribution changed more uniform. The maximum Mises stress becomes larger with the friction coefficient increased. The powder displacement decreases near die as the friction coefficient increasing. The research can both predict the tablet property and provide the theory reference for tablet practice production through the finite element analysis of pharmaceutical powder compaction.

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