Abstract
Welded joints are wildly used in the construction sector for fabrication of steel and aluminium structures. A welded joint is traditionally divided into three regions: The Base Material (BM), the Heat-Affected Zone (HAZ), and the Weld Material (WM). The mechanical behaviour of each region varies depending on properties of BM, FM and welding parameters. In general, HAZ has a lower material strength compared to BM and WM. The material strength difference is even more significant if BM is made of High Strength Steel (HSS) and welded by using undermatching electrodes. Therefore, it is essential to obtain the constitutive model of HAZ to accurately predict the behaviour (strength, stiffness, and ductility) of the HSS welded joint. In this paper, milled coupon specimens with a transverse butt weld in the middle are used for obtaining the original stress-strain relationship of HAZ and WM based on Digital Image Correlation (DIC) measurements. The original and the modified HAZ constitutive model are validated against the milled and unmilled coupon specimens by Finite Element Analysis (FEA). Comparing the FEA and experimental results, it can be concluded that the modified HAZ constitutive model is successfully validated. Finally, the tensile behaviour of the butt-welded square hollow section is investigated through FEA. It is found that the peak deformation would be significantly overestimated if the modified HAZ constitutive model is not used.
| Original language | English |
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| Title of host publication | Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems - Proceedings of the 8th International Conference on Structural Engineering, Mechanics and Computation, 2022 |
| Editors | Alphose Zingoni |
| Publisher | CRC Press / Balkema - Taylor & Francis Group |
| Pages | 1166-1171 |
| Number of pages | 6 |
| ISBN (Print) | 9781003348443 |
| DOIs | |
| Publication status | Published - 2023 |
| Event | 8th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2022 - Cape Town, South Africa Duration: 5 Sept 2022 → 7 Sept 2022 |
Conference
| Conference | 8th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2022 |
|---|---|
| Country/Territory | South Africa |
| City | Cape Town |
| Period | 5/09/22 → 7/09/22 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.