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Analysis of densification and swelling of solids using pressure dependent plasticity criteria
KTH, Superseded Departments, Solid Mechanics.
2004 (English)In: CMES - Computer Modeling in Engineering & Sciences, ISSN 1526-1492, Vol. 5, no 1, 73-80 p.Article in journal (Refereed) Published
Abstract [en]

We consider certain constitutive laws for analyzing the elastic-plastic behavior of granular material, which is subjected to compressive hydrostatic stresses and concomitantly undergoing swelling. The plastic yield functions for this kind of materials are pressure and porosity dependent. The constitutive laws are formulated in a finite element (FE) framework for applications to structures involving granular/porous materials. We have employed an implicit and unconditionally stable algorithm for numerical integration of the constitutive relations. The numerical method has been programmed in a FE computer code. The code is then used to study a plane strain problem for a range of model parameters and yield criteria, where the stress response of material under compressive loads is evaluated. Finally the method is applied to the case of B4C powder encased in a stainless steel tube, which is subjected to compressive loads under swelling condition.

Place, publisher, year, edition, pages
2004. Vol. 5, no 1, 73-80 p.
Keyword [en]
densification, swelling, pressure dependent plasticity, FEM, integration, models
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-23140ISI: 000188752000007ScopusID: 2-s2.0-8344223689OAI: diva2:341838
QC 20100525 QC 20111025. Symposium on Computational Modeling of Materials. PUERTO VALLARTA, MEXICO. AUG, 2001Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-11-01Bibliographically approved

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