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EXPERIMENTAL AND FINITE-ELEMENT STUDIES ON MODE-I AND MIXED-MODE (I AND II) STABLE CRACK-GROWTH .1. EXPERIMENTAL

DSpace at IIT Bombay

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Title EXPERIMENTAL AND FINITE-ELEMENT STUDIES ON MODE-I AND MIXED-MODE (I AND II) STABLE CRACK-GROWTH .1. EXPERIMENTAL
 
Creator MAHANTY, DK
MAITI, SK
 
Subject stress-strain field
brittle-fracture
ductile fracture
tip deformation
initiation
extension
criteria
mechanics
behavior
shear
 
Description Experimental results on mode I and mixed mode stable crack growth under static loadings through an aluminium alloy (D16AT) are presented. The compact tension type of geometry was employed for both the sets of tests. Data pertaining to load-deflection diagrams, crack opening displacements, crack front geometry, etc., are included. There is a greater spurt of crack growth at the initiation stage in a mixed mode than in mode I. The crack opening angle (COA) remained nearly constant during the whole stable growth. There is a substantial tunneling, the extent of which increases as the extension progresses in both mode I and mixed mode. The tunneling reduces as the ratio a(0)/W increases. Because of this tunneling, the COD at a point finite distance behind the crack tip and on the specimen surface is much more than expected. At the maximum load the tunneling is 2 to 3.5 mm in the case of mode I. The crack extends intially almost along a straight line at an angle with the initial crack in a mixed mode. The maximum to initiation load ratio varied in the range 1.50 to 1.75 for the whole range of tests.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-24T08:31:01Z
2011-12-26T12:56:49Z
2011-12-27T05:46:05Z
2011-08-24T08:31:01Z
2011-12-26T12:56:49Z
2011-12-27T05:46:05Z
1990
 
Type Article
 
Identifier ENGINEERING FRACTURE MECHANICS, 37(6), 1237-1250
0013-7944
http://dx.doi.org/10.1016/0013-7944(90)90065-O
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10820
http://hdl.handle.net/10054/10820
 
Language en