Physics – Condensed Matter – Materials Science
Scientific paper
2011-02-25
Physics
Condensed Matter
Materials Science
34 pages, 11 figures
Scientific paper
The paper presents analytical or semi-analytical solutions for the formation and evolution of localized plastic zone in a uniaxially loaded bar with variable cross-sectional area. A variationally based formulation of explicit gradient plasticity with linear softening is used, and the ensuing jump conditions and boundary conditions are discussed. Three cases with different regularity of the stress distribution are considered, and the problem is converted to a dimensionless form. Relations linking the load level, size of the plastic zone, distribution of plastic strain and plastic elongation of the bar are derived and compared to another, previously analyzed gradient formulation.
Jirasek Milan
Rokoš Ondřej
Zeman Jan
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