FE Modelling of Al-Alloy Weld Joints using Random Mixing Method

A random mixing FE modeling was proposed to implement mechanical behaviours of butt weld joint using only two kinds of material data, i.e. true stress-strain curves of base metal and deposited metal in the present study. Al6082-T6 and 7H01-T7 type extruded aluminium alloys have been used as base met...

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Bibliographic Details
Published in:International journal of precision engineering and manufacturing 2018-11, Vol.19 (11), p.1681-1688
Main Authors: Kim, Dae Yeong, Cheon, Seong Sik, Suh, Jung Do
Format: Article
Language:English
Subjects:
Aluminum base alloys
Base metal
Butt joints
Computer simulation
Engineering
Extrusion
Hardness tests
Heat affected zone
Heat treating
Industrial and Production Engineering
Materials Science
Regular Paper
Stress-strain curves
Stress-strain relationships
Tensile tests
True stress
Welded joints
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Summary:A random mixing FE modeling was proposed to implement mechanical behaviours of butt weld joint using only two kinds of material data, i.e. true stress-strain curves of base metal and deposited metal in the present study. Al6082-T6 and 7H01-T7 type extruded aluminium alloys have been used as base metal. The metal plasticity and damage characteristics were considered using Wilkins material model to simulate the ductile behaviour of aluminium alloys. True stress-strain curves and parameters necessary for Wilkins model of aluminium alloys were found by notched specimen tensile tests. For main weld joint specimens, i.e., Al6082-T6 vs. Al6082-T6 (Type 1), 7H01-T7 vs. 7H01-T7 (Type 2) and Al6082-T6 vs. 7H01-T7 (Type 3) were prepared. Hardness tests were performed to find out how far the welding heat affected the base metal, i.e. the length of heat affected zone. Tensile tests were also conducted to characterise mechanical behaviours of weld joints. Finally, FE analysis results for three types of specimens mentioned above were compared with corresponding tensile test results.
ISSN:2234-7593
2005-4602
DOI:10.1007/s12541-018-0195-8