Modelling delamination of a DCB test by using non-linear truss interface elements and plate elements with assumed shear strain
Editorial Universitat Politècnica de València, 2022
Online
Buch
Zugriff:
[EN] Fracture resistance of structural adhesive joints is key for their application in the industry. Mode-I adhesive joint delamination is the most severe type of fracture and the possibility of this outcome should be avoided whenever possible. In this work we are investigating mode-I delamination of plate-like specimens, where the width is comparable to the length. In such cases anticlastic bending of the plates takes place on the debonded part and the crack front is a curve rather than a straight line. We model the interface by means of discrete non-linear truss elements with embedded exponential traction-separation law [1]. Such choice is justified because in this test, only pure mode-I (opening) displacements occur at the interface, which in our case will cause axial elongation of the truss elements. The plates are modelled using 4-node plate finite elements derived by the assumed shear strain approach that pass the general constant-bending patch test [2]. Cohesive-zone interface parameter identification is performed by a direct method (J-integral) [3] and by virtual experiments regression. Numerical tests have been performed and the exponential cohesive-zone interface model compared against the bi-linear in terms of precision, robustness and computing time. The results confirm the experimentally observed behaviour with anticlastic bending of the arms and the curved crack front. ; Hlača, I.; Ribarić, D.; Škec, L.; Zefreh, M. (2022). Modelling delamination of a DCB test by using non-linear truss interface elements and plate elements with assumed shear strain. En Proceedings of the YIC 2021 - VI ECCOMAS Young Investigators Conference. Editorial Universitat Politècnica de València. 16-23. https://doi.org/10.4995/YIC2021.2021.12587 ; OCS ; 16 ; 23
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Modelling delamination of a DCB test by using non-linear truss interface elements and plate elements with assumed shear strain
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Autor/in / Beteiligte Person: | Hlača, Ivan ; Ribarić, Dragan ; Škec, Leo ; Zefreh, Maedeh ; Croatian Science Foundation |
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Veröffentlichung: | Editorial Universitat Politècnica de València, 2022 |
Medientyp: | Buch |
ISBN: | 978-84-9048-969-7 (print) ; 84-9048-969-6 (print) |
DOI: | 10.4995/YIC2021.2021.12587 |
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