Distortions in GMAW of Thin Plates: Temperature and 3-D Deformation Measurements Using High-Speed Thermal Imaging and Stereoscopic Video Imaging

H. A. Bruck, H. W. Schreier, M. A. Sutton, Y. J. Chao, X. Deng, M. Davoud

Research output: Contribution to conferencePaperpeer-review

3 Scopus citations

Abstract

Thermal residual stresses developed during the Gas Metal Arc Welding (GMAW) process can induce distortion in thin plates. In order to control the distortion, models are being developed using numerical analyses such as thermomechanical Finite Element Methods (FEM) to predict the thermal residual stress fields responsible for distortion. The effect of material behavior and processing conditions on the distortions predicted by these codes need to be directly verified before the codes can be used reliably. The parameters of greatest importance to this problem are the temperature fields generated near the weld zone and the subsequent strains induced by the changes in these fields and the presence of a material inhomogeneity, i.e. the weldment. In-situ measurements of temperature and 3-D deformation fields near a weldment were made using the Video Imaging and Thermal Analysis (VITA) system. The VITA system consists of a high-speed infrared thermal imaging camera and a stereoscopic video imaging system. The accuracy of VITA measurements was verified by direct comparison with strain gage and thermocouple measurements. In addition, temperature and curvature measurements obtained with the VITA system were used to explain the origin of the in-plane strain.

Original languageEnglish
Pages967-971
Number of pages5
StatePublished - 1998
EventTrends in Welding Research: Proceedings of the 5th International Conference - Pine Mountain, GA, United States
Duration: Jun 1 1998Jun 5 1998

Conference

ConferenceTrends in Welding Research: Proceedings of the 5th International Conference
Country/TerritoryUnited States
CityPine Mountain, GA
Period06/1/9806/5/98

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