DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/6512

Title: Dugdale cohesive zone modeling to evaluate J integral at the interface of strength mismatched steels: A simplified numerical approach
Authors: BHAT, S
UKADGAONKER, VG
Keywords: fatigue-crack growth
bimaterial interface
finite-element
driving-force
plasticity
weld
Issue Date: 2010
Publisher: ELSEVIER SCIENCE BV
Citation: FINITE ELEMENTS IN ANALYSIS AND DESIGN, 46(7), 601-610
Abstract: When the crack tip in ductile parent body reaches near the interface of another elastically matched but strength mismatched ductile body, the plasticity or yield zone at the tip spreads to interface body which triggers the effect of strength mismatch between the bodies over the tip by way of plasticity induced load transfer. The interface effect is best quantified by the value of J integral, J(interface), obtained over a path around the interface of the bodies in the yield zone. The paper presents finite element analysis of minute yield zone, formed at Mode I crack tip in linear elastic regime, across a strength mismatched interface to determine J(interface). The yield zone, treated as Dugdale's cohesive zone, is isolated from the bimetallic body domain and modeled alone under the action of cohesive stresses. Effect of farfield load at the interface is obtained separately. Such an uncomplicated approach is first tested successfully over theoretical results of cohesive zone across a thin interface of weak ASTM 4340 alloy and strong MDN 250 maraging steels under monotonic load. Subsequently, it is verified vis-a-vis experimental results of cyclic cohesive zone developed across the weld interface in bimetallic compact tension specimen by subjecting the crack in alloy steel near the interface of ultra strong weld between the stated steels to high cycle fatigue. .
URI: http://dx.doi.org/10.1016/j.finel.2010.02.007
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6512
http://hdl.handle.net/10054/6512
ISSN: 0168-874X
Appears in Collections:Article

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback