Modelling And Simulation The Cracking Of Green Metal Powder Body

Häggblad, Hans-åke (author): Luleå tekniska universitet,Material- och solidmekanik

Gustafsson, Gustaf (author): Luleå tekniska universitet,Material- och solidmekanik

Oldenburg, Mats (author): Luleå tekniska universitet,Material- och solidmekanik

Golling, Stefan (author): Luleå tekniska universitet,Material- och solidmekanik

(creator_code:org_t)

European Powder Metallurgy Association, 2016
2016
English.
In: Proceedings World PM2016 Congress. - : European Powder Metallurgy Association. - 9781899072484

Abstract Subject headings

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.

By the author/editor: Häggblad, Hans-å ...; Jonsén, Pär; Gustafsson, Gust ...; Oldenburg, Mats; Golling, Stefan

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Applied Mechanic ...

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