abstract

• The gas metal arc welding (GMAW) process was used to weld 3003-H14 plates under restricted and unrestricted thermal expansion. Experimental and numerical analysis were conducted to determine the relation between weld thermal cycles and residual stresses. A customized data acquisition system with K-type thermocouples was used to measure the weld thermal cycles, while residual stresses were determined by the hole drilling method. Thermomechanical simulation models for the two restricted conditions were implemented from the experimental data obtained. A double ellipse heat distribution geometry was used to model the heat moving source by using the finite element method. Thermal rates and peak temperatures were approximated by the finite element model with 2%25 difference, with respect to the experimental weld thermal cycles. Longitudinal and transverse normal residual stresses determined by the finite element model showed a good comparison with experimental measurements. The larger residual stresses were in the transverse direction for both clamping conditions, which indicated that working loading paths along the lateral direction of the welded plate are more influenced by the postwelding residual stresses. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

authors

• Ambriz R.R.
• García López Christian Jesús
• Hernández M.
• Jaramillo D.

publication date

• 2020-01-01

funding provided via

• A1-S-27474  Grant

published in

• Metals  Journal

keywords

• Aluminum 3003-H14; Finite element analysis; GMAW; Heat moving source; Residual stresses

Digital Object Identifier (DOI)

• 10.3390/met10060708

start page

end page

volume

• 10

issue

• 6