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Modelling of laser beam spot-weld using 2-D hybrid crack finite elements

Yang, Chunhui and Zhang, Y. 2008, Modelling of laser beam spot-weld using 2-D hybrid crack finite elements, in APCMP 2008 : Proceedings of the 8th Asia-Pacific conference on materials processing, Frontiers of Design and Manufacturing, Riverwood, N.S.W., pp. 1137-1142.

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Title Modelling of laser beam spot-weld using 2-D hybrid crack finite elements
Author(s) Yang, Chunhui
Zhang, Y.
Conference name Asia-Pacific Conference on Materials Processing (8th : 2008 : Guilin, China, and Guangzhou, China)
Conference location Guilin-Guangzhou, China
Conference dates 15-20 June 2008
Title of proceedings APCMP 2008 : Proceedings of the 8th Asia-Pacific conference on materials processing
Editor(s) Wang, C. Y.
Li, X. P.
Wang, J.
Publication date 2008
Conference series Asia-Pacific Conference on Materials Processing
Start page 1137
End page 1142
Publisher Frontiers of Design and Manufacturing
Place of publication Riverwood, N.S.W.
Summary Laser beam spot-welding is widely applied to join sheet metals for automotive components especially for thinsheet components in automotive industries. The spot welds in such metallic structures contribute a lot to the integrated strength and fatigue life for the whole structures and they are responsible for their damage or collapse in some loading cases. In this paper, the 2-D hybrid special finite elements each containing an edge crack are employed to study the fracture behaviors of laser beam spot-welds. Hence the calculation accuracy in the vicinity of crack tips is ensured, and a better description of stress singularity with only one hybrid element surrounding one crack is provided. The numerical modeling for laser beam spot-welds subjected to three typical modes ofloadings including tension-lap, shear-lap and angle-clip can be greatly simplified with the applications of such elements. Three specimens under lap-shear, lap-tension and angle clip are devised and analyzed respectively, and main fracture parameters such as stress intensity factors and the initial direction of crack growth are obtained through tinite element analyses. The computed results ti'om numerical examples demonstrate the validity and versatility of the proposed modeling.
ISBN 9780958069298
Language eng
Field of Research 090202 Automotive Engineering Materials
Socio Economic Objective 861205 Sheet Metal Products
HERDC Research category E1 Full written paper - refereed
Copyright notice ©2008, APCMP
Persistent URL http://hdl.handle.net/10536/DRO/DU:30018279

Document type: Conference Paper
Collection: School of Engineering and Information Technology
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