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Modelling And Simulation The Cracking Of Green Metal Powder Body
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-7514-0513
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0003-0910-7990
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-3907-0802
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0001-7074-8960
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2016 (English)In: Proceedings World PM2016 Congress: International Powder Metallurgy Congress & Exhibition 9-13 October 2016, Hamburg, Germany, European Powder Metallurgy Association , 2016Conference paper, Published paper (Refereed)
Abstract [en]

During the ejection stage of the powder metallurgy (PM) pressing process the elastic behaviour is important. Especially, if the in the powder compact is unloaded in a non-beneficially manner crack formation can occur. Experiments show a non-linear and also stress dependent elastic behaviour of green bodies. Calibrated against experimental data, a fracture model controlling the stress versus crack-width relationship is used. The softening rate of the fracture model is obtained from the corresponding rate of the dissipated energy. The model is implemented with a smeared crack approach in a finite element code and tested in simulation of a diametral compression testing. Results from simulations correlates well with experimental results. The smeared crack method combined with a cohesive fracture model is an interesting tool for predicting fracture in powder compacts.

Place, publisher, year, edition, pages
European Powder Metallurgy Association , 2016.
National Category
Engineering and Technology Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-61125ISBN: 978-1-899072-48-4 (print)OAI: oai:DiVA.org:ltu-61125DiVA, id: diva2:1057247
Conference
International Powder Metallurgy Congress & Exhibition, Hamburg, 9-13 October 2016
Available from: 2016-12-16 Created: 2016-12-16 Last updated: 2018-04-12Bibliographically approved

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Häggblad, Hans-åkeJonsén, PärGustafsson, GustafOldenburg, MatsGolling, Stefan

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Häggblad, Hans-åkeJonsén, PärGustafsson, GustafOldenburg, MatsGolling, Stefan
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Mechanics of Solid Materials
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