Formability limits by local buckling in thin-walled tubes and profiles
Inês M. Almeida, João P. Magrinho, M. Beatriz Silva, Paulo A.F. Martins
Abstract. Evaluating the formability limits due to local buckling is crucial for assessing the structural performance of thin-walled tubes and profiles under compressive loads. This study compares different methodologies to determine the formability limits of thin-walled tubes and profiles with circular, square, and other cross-sections, emphasizing how geometry affects their overall deformation behaviour. The presence of corners in tubes and profiles with non-circular cross-sections leads to distinct deformation patterns compared to tubes with circular cross-sections, requiring different assessment procedures. For tubes and profiles with non-circular cross-sections, strain values are sufficiently high to be accurately measured using a Digital Image Correlation (DIC) system, yielding reliable experimental data. In contrast, the strain values in tubes with circular cross-sections are too small for reliable DIC measurement. To overcome this limitation, digital twins were developed to enable precise simulation and analysis of local buckling. This study highlights the importance of adapting measurement methodologies to the structure’s specific geometry and deformation characteristics. The findings enhance our understanding of formability limits and provide guidelines for selecting the appropriate experimental and computational methods for specific thin-walled structure applications.
Keywords
Thin-Walled Tubes, Thin-Walled Profiles, Local Buckling, Formability Limits
Published online 5/7/2025, 8 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Inês M. Almeida, João P. Magrinho, M. Beatriz Silva, Paulo A.F. Martins, Formability limits by local buckling in thin-walled tubes and profiles, Materials Research Proceedings, Vol. 54, pp 1061-1068, 2025
DOI: https://doi.org/10.21741/9781644903599-115
The article was published as article 115 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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