Tribology Online
Online ISSN : 1881-2198
ISSN-L : 1881-218X
Article
Improvement of Discrete Element Simulation Accuracy of Steel Powder Filling Behavior by Optimization of Contact and Friction Parameters
Naoki YashiroKouya OohiraNatsuko SugimuraHitoshi Washizu
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JOURNAL OPEN ACCESS

2021 Volume 16 Issue 1 Pages 16-23

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Abstract

The filling behavior of Fe-Ni-Mo steel powder for sintered machine parts is simulated using our original DEM (Discrete Element Method) code based on FDPS (Framework for Developing Particle Simulator). The difference between the simulated and experimental apparent densities after self-weight filling is only -6.7%, which is a significantly higher prediction accuracy than the prior study. This result is obtained by only calculating the repulsive force, viscous damping, friction force and gravity using the actual Young's modulus. This is due to using the experimental friction coefficients and the upper limit setting of the distance between the particle surfaces based on the experimental study. This method can be used to simulate the porosity, especially the low density region, in the actual filling process.

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© 2021 by Japanese Society of Tribologists

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