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Effective stress function algorithm for pressure-dependent plasticity applied to hot isostatic pressing
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.
Oddy/McDIll Numerical Investigations Sciences, Inc..
1998 (engelsk)Inngår i: International Journal for Numerical Methods in Engineering, ISSN 0029-5981, E-ISSN 1097-0207, Vol. 43, nr 4, s. 587-606Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

An algorithm for unconditionally stable and accurate integration of elasto-viscoplastic pressure-dependent constitutive model is presented. Rate form constitutive equations of thermal-elastoviscoplastic type with compressibility take into account the changes in relative density. The algorithm computes the deviatoric and volumetric creep strains by finding the value of the effective stress which satisfies the functional relationship, the effective stress function. Thus, one non-linear scalar equation is solved to find the unknown volumetric and deviatoric components of creep strain tensor. The tangent modulus is evaluated consistent with the integration algorithm. The application of the method to the simulation of hot isostatic pressing of metal powder is shown. The paper presents the solution of the verification problem and comparison with the experimental result.

sted, utgiver, år, opplag, sider
1998. Vol. 43, nr 4, s. 587-606
HSV kategori
Forskningsprogram
Materialmekanik
Identifikatorer
URN: urn:nbn:se:ltu:diva-5607DOI: 10.1002/(SICI)1097-0207(19981030)43:43.0.CO;2-7Lokal ID: 3c1816e0-bb49-11db-b560-000ea68e967bOAI: oai:DiVA.org:ltu-5607DiVA, id: diva2:978481
Merknad
Godkänd; 1998; 20070205 (cira)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2017-11-24bibliografisk kontrollert

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Svoboda, AlesLindgren, Lars-Erik

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