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 language | English |
---|---|
Pages | 967-971 |
Number of pages | 5 |
State | Published - 1998 |
Event | Trends in Welding Research: Proceedings of the 5th International Conference - Pine Mountain, GA, United States Duration: Jun 1 1998 → Jun 5 1998 |
Conference
Conference | Trends in Welding Research: Proceedings of the 5th International Conference |
---|---|
Country/Territory | United States |
City | Pine Mountain, GA |
Period | 06/1/98 → 06/5/98 |