| Autor: |
Han, J.G., Chang, Kyong Ho, Jang, Gab Chul, Hong, K.K., Cho, Sam Deok, Kim, Young Seok, Kim, J.M., Shin, Y.E. |
| Zdroj: |
Materials Science Forum; June 2008, Vol. 580 Issue: 1 p557-560, 4p |
| Abstrakt: |
Recently, in the loading tests for steel members, the deformation value is measured by calculating a distance of both cross-heads. This measuring method encounters a test error due to various environmental factors, such as initial slip, etc.. Especially, in the case of welded members, the non-uniform deformation behavior in welded joints is observed because of the effect of welding residual stress and weld metal. This is mainly responsible for a test error and a loss of the reliability for used test instruments. Therefore, to improve the accuracy and the applicability of measuring system, it is necessary to employ a visual monitoring system which can accurately measure the local and overall deformation of welded members. In this paper, to accurately measure a deformation of welded members, a visual monitoring system (VMS) was developed by using three-dimensional digital photogrammetry. The VMS was applied to the loading tests of a welded member. The accuracy and the applicability of VMS was verified by comparing to the deformation value measured by a test instrument (MTS-810). The characteristics of the behavior near a welded joint were investigated by using VMS. |
| Databáze: |
Supplemental Index |
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