Comparison of FE Models to Predict the Welding Distortion in T-Joint Gas Metal Arc Welding Process

Title
Comparison of FE Models to Predict the Welding Distortion in T-Joint Gas Metal Arc Welding Process
Author(s)
김재웅왕초김용래
Keywords
RESIDUAL-STRESS
Issue Date
201408
Publisher
KOREAN SOC PRECISION ENG
Citation
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING, v.15, no.8, pp.1631 - 1637
Abstract
A computational procedure is presented for analyzing temperature field and welding distortion in gas metal arc welding (GMAW) of lug on plate, which is modified to a T-joint weld of SCM440 steel plate for experiment and modeling. The objective of this paper is to develop a more accurate model to predict angular distortion and longitudinal bending of the T-joint weld Based on the commercial analysis software, 3 kinds of finite element (FE) numerical models are developed and compared The first numerical model is the integral solid body which is composed of rib, plate and weld bead The second model is based on model 1 and has a blank gap between the rib and plate. And the third one is the peculiar model in which the weld bead is generated with the welding speed during the numerical calculation by using the 'element rebirth technique (ERT)'. Experiments are also carried out to measure the angular distortion and longitudinal bending in T-joint GMAW: By comparing the simulation results with the measurements, it is found that the results predicted by the models matched the experiment results well. Moreover, the model 3 with ERT predicts the best result. So it is verified that the model with thermo-elastic-plastic, large deformation theory with blank gap and using the ERT can predict the deformation pretty well.
URI
http://hdl.handle.net/YU.REPOSITORY/31325http://dx.doi.org/10.1007/s12541-014-0513-8
ISSN
2234-7593
Appears in Collections:
공과대학 > 기계공학부 > Articles
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