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Finite element simulation of laser spot welding

DSpace at IIT Bombay

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Field Value
 
Title Finite element simulation of laser spot welding
 
Creator DE, A
MAITI, SK
WALSH, CA
BHADESHIA, HKDH
 
Subject heat-transfer
penetration
model
shape
beam
flow
 
Description The present work reports on a two-dimensional axisymmetric finite element analysis of heat flow during laser spot welding, taking into account the temperature dependence of the physical properties and latent heat of transformations. An analysis based on conduction heat transfer alone, but using the double ellipsoidal' representation of the laser beam, seems to be sufficient to estimate the transition to keyhole formation during laser spot welding, although the 'double ellipsoidal' representation requires an a priori knowledge of the expected weld pool dimensions. Transient temperature isotherms and the weld pool dimensions are predicted using the model; the latter are found to compare well with measurements of weld bead dimensions. The results show that the keyhole mode is stimulated using either a high laser power and low on-time or a low laser power and high on-time. The outcomes are found to be sensitive to the assumed absorptivity and the assumed weld pool depth used to define the 'double ellipsoidal' heat source.
 
Publisher MANEY PUBLISHING
 
Date 2011-08-18T04:48:20Z
2011-12-26T12:55:35Z
2011-12-27T05:41:18Z
2011-08-18T04:48:20Z
2011-12-26T12:55:35Z
2011-12-27T05:41:18Z
2003
 
Type Article
 
Identifier SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 8(5), 377-384
1362-1718
http://dx.doi.org/10.1179/136217103225005570
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9896
http://hdl.handle.net/10054/9896
 
Language en