| Autor: |
K. Lavernhe-Taillard, René Billardon, B. Darciaux, B. Beaubier, C. Boucq, P. Laloue |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Residual Stress, Thermomechanics & Infrared Imaging, Hybrid Techniques and Inverse Problems, Volume 8 ISBN: 9783319008752 |
| DOI: |
10.1007/978-3-319-00876-9_24 |
| Popis: |
Welding-brazing is one of the various processes involving a heat source and used by car manufacturers to assemble large thin steel sheets. The maximum temperature imposed to the assembled sheets by this welding-brazing process is lower than the maximum temperature imposed by many other welding processes. However, considering the dimensions of the assembled sheets – typically less than 1 mm in thickness and more than 1 m2 in surface – and the fact that these sheets are subjected to various forming processes by plastic deformation before being assembled, the welding-brazing process may induce more or less localized undesirable deformations of the assembly. The work presented herein is part of a study the aim of which is to develop thermo-mechanical finite element simulations of the whole process in order to predict these deformations – which may help and reduce development time and cost. The validation of such numerical simulations is based on the comparison of numerical results and experimental evidences, which requires the development of well-controlled and highly instrumented tests. This paper is dedicated to the identification of the heat source model representing the welding-brazing operation. This identification is derived from the results of welding-brazing tests instrumented with thermocouples and infrared cameras. Micrographic observations in the vicinity of the welding-brazing joint are used to (partially) validate the numerical predictions of the Heat Affected Zone (HAZ). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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