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Title: Two-dimensional elastic-plastic cracked finite element for fracture applications
Authors: Kalanad, Aysha
Rao, B N
Keywords: Cracked finite element
Elastic-plastic fracture mechanics
User element
Natural frequency
Issue Date: Apr-2012
Publisher: NISCAIR-CSIR, India
Abstract: In this paper a novel two-dimensional finite element with a single, non-propagating, open embedded edge crack is developed based on elastic-plastic fracture mechanics. The influence of crack on the local flexibility of the structure is accounted for by the reduction of the element stiffness as a function of the crack length, instead of physically modeling the crack within the element. The proposed element accounts the influence of crack tip plasticity, at the cracked cross-section. The components of the stiffness matrix for the proposed cracked element are derived based on the Castigliano’s first principle. The element is implemented as a user element (UEL) subroutine in ABAQUS. The proposed element can be applied in a wide range of fatigue and fracture applications in order to determine changes in static, dynamic, and stability characteristics of cracked structures.
Description: 95-106
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.19(2) [April 2012]

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