On the physical interpretation of the Kawakita and Adams parameters derived from confined compression of granular solids
2008 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 182, no 3, 424-435 p.Article in journal (Refereed) Published
The objective of this paper was to investigate the physical significance of the Kawakita and Adams parameters derived from the compressionof some granular solids. Four model granules of different expected deformation behaviour were prepared by varying the composition and porosityof the granules. The granules were nearly spherical and of similar size and showed a variation in mechanical properties in terms of their elasticity,plasticity, fracture strength and brittleness. Due to the size and shape of the granules, compression due to granule rearrangement was generallylimited. The Kawakita a parameter approximated the maximal engineering strain of the granular solids and both the Kawakita a and b−1parameter reflected the plasticity of the granules. The Adams parameter τ0 seemed to reflect the initial cracking of granules. Thus, the combineduse of the Kawakita parameters a and b−1 and the Adams parameter τ0 may give a comprehensive representation of the compression behaviour ofgranular solids.
Place, publisher, year, edition, pages
2008. Vol. 182, no 3, 424-435 p.
Compression, powder, granular materials, compression parameters, Kawakita, mechanical properties
Pharmaceutical Sciences Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-97466DOI: 10.1016/j.powtec.2007.07.009ISI: 000254818800012OAI: oai:DiVA.org:uu-97466DiVA: diva2:172427