Effect of Pressure on the Fracture of Compacted Argillaceous Particles

Mohamed Bouaziz, Said Abid, Hatem Ksibi

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DOI: 10.4236/eng.2012.41004                

Abstract

The compaction of granulated powder is a common forming process used in ceramic and pharmaceutical industries. Argillaceous particles are used as a model system to investigate granule failure during cold compaction. In this work both experimental and numerical investigations have been focused on the fracture in powder compacts. This includes studies of crack propagation and determination of operating conditions to avoid the green body fracture. In fact, axial compaction tests have been performed to determine material parameters for hardening. The numerical modelling is implemented using a finite element method based on the Van Mises criterion. Simulation examples are presented to dem- onstrate the ability of the model to compute the distribution of the relative stresses in porous media.

Keywords

Cold Compaction; Powder Technology; Fracture; Scraped Surface; Cracking Cone; Numerical Simulation

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	M. A. Meyers, A. Mishra, D. J. Benson, “Mechanical properties of nanocrystalline materials,” Progress in Materials Science, Vol. 51, No. 4, 2006, pp 427-556. doi:10.1016/j.pmatsci.2005.08.003
[2]	S. C. Lee and K. T. Kim, “A Study on the Cap Model for Metal and Ceramic Powder under Cold Compaction,” Materials Science and Engineering A, Vol. 445-446, 2007, pp. 163-169. doi:10.1016/j.msea.2006.09.013
[3]	K. Mori, “Finite Element Simulation of Powder Forming and Sintering,” Computer Methods in Applied Mechanics and Engineering, Vol. 195, No. 48-49, 2006, pp. 6737-6749. doi:10.1016/j.cma.2005.10.015
[4]	P. Jonse?n and H. Ha?ggblad, “Modelling and Numerical Investigation of the Residual Stress State in a Green Metal Powder Body,” Powder Technology, Vol. 155, No. 3, 2005, pp. 196-208. doi:10.1016/j.powtec.2005.05.056
[5]	Y. S. Kwon, S. H. Chung, H. I. Sanderow, K. T. Kim, R. M. German, “Numerical Analysis and Optimization of Die Compaction Process,” PM2TECH Conference, Las Vegas, 2003, pp. 4-37.
[6]	M. Miyashita, J.-Y. Kim, Z. Kato, N. Uchida and K. Uematsu, “Effect of Compaction Pressure on the Internal Structure of Sintered Alumina,” Journal of the Ceramic Society of Japan, Vol. 17, No. 2-3, 1997, pp. 177-181.
[7]	A. D. Salman, G. K. Reynolds, J. S. Fu, Y. S. Cheong, C. A. Biggs, M. J. Adams, D. A. Gorham, J. Lukenics and M. J. Hounslow, “Descriptive Classification of the Impact Failure Modes of Spherical Particles,” Powder Technology, Vol. 143-144, 2004, pp. 19-30. doi:10.1016/j.powtec.2004.04.005
[8]	S. Abid, M. Bouaziz and H. Ksibi, “Cracking Cone Fracture Afterwards Cold Compaction of Argillaceous Particles,” Bulletin of Materials Science, Vol. 32, No. 6, 2009, pp. 607-610. doi:10.1007/s12034-009-0093-x
[9]	J. X. Liu and T. J. Davies, “Coordination Number- Density Relationships for Random Packing of Spherical Powders,” Powder Metallurgy, Vol. 40, No. 1, 1997, pp. 48-50.
[10]	J. X. Liu and D. P. De Lo, “Particle Rearrangement during Powder Compaction,” Metallurgical and Materials Transactions A, Vol. 32, No. 12, 2001, pp. 3117-3124. doi:10.1007/s11661-001-0186-7