A numerical analysis of cold powder compaction based on micromechanical experiments
2013 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 243, 71-78 p.Article in journal (Refereed) Published
The discrete element method (DEM) is used for predicting the compaction behavior of two types of spray dried cemented carbide granules. The material model of the granules is determined by micromechanical experiments. First, compression tests are performed on single granules giving information of the deformation behavior at relatively small deformations. For larger deformations, nanoindentation tests are performed to give further information of the constitutive behavior indicating a strong hardening behavior at high strains. The material model is implemented in an FE model of two particles in contact and the relation between contact force and indentation depth is exported to a DEM program. The DEM program is used to simulate presently performed uniaxial die compaction experiments where the geometry of the die is taken into account. Excellent agreement is found between the experiments and the numerical predictions in the range where results from DEM simulations are valid.
Place, publisher, year, edition, pages
2013. Vol. 243, 71-78 p.
Cemented carbides, Contact mechanics, Discrete element method, Granule strength measurements, Nanoindentation, Powder compaction
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-134166DOI: 10.1016/j.powtec.2013.03.040ISI: 000320143000009ScopusID: 2-s2.0-84876474506OAI: oai:DiVA.org:kth-134166DiVA: diva2:665548
QC 201311202013-11-202013-11-182015-01-22Bibliographically approved