Jaka Dujc (Author), Boštjan Brank (Author), Adnan Ibrahimbegović (Author)

Abstract

We present a quadrilateral finite element with discontinuous displacement fields that can be used to model material failure in 2d brittle and ductile solids. The element provides mesh-objective results. The element's kinematics can represent linear displacement jumps along the discontinuity line in both normal and tangential directions to the line. The cohesive law in the discontinuity line is based on rigid-plasticity model with softening. The material of the bulk of the element is described by hardening plasticity model. Static condensation of the jump-in-displacements kinematic parameters is made, which provides standard form of the element stiffness matrix. However, in order to make the discontinuity growth algorithm more robust, the continuity of the failure line between the elements is enforced. Several numerical tests show that the element can describe constant and linear separation modes without spurious transfer of the stresses. Other numerical examples represent failure of pure concrete, composite and metal 2d solids.

Keywords

gradbene konstrukcije;vgrajena neveznost;porušitev materiala;mehčanje;civil engineering;embedded discontinuity;material failure;softening;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: Techno Press
UDC: 624.07
COBISS: 5301345 Link will open in a new window
ISSN: 1526-1492
Views: 2067
Downloads: 557
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Other data

Secondary language: English
Secondary keywords: gradbene konstrukcije;vgrajena neveznost;porušitev materiala;mehčanje;
File type: application/pdf
Type (COBISS): Not categorized
Pages: str. 223-260
Volume: ǂLetn. ǂ69
Issue: ǂšt. ǂ3
Chronology: 2010
DOI: 10.3970/cmes.2010.069.223
ID: 8312996