ScienceDirect Available online at www.sciencedirect.com Procedia Structural Integrity 28 (2020) 1601–1620 2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.10.132 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Keywords: Mixed-mode failure; Strain energy release rate; J-integral; Adhesive thickness; Fracture envelope * Corresponding author. Tel.: +49-241-80 96837. E-mail address: [email protected] 1st Virtual European Conference on Fracture Influence of fracture envelope on FE failure load prediction of adhesively bonded joints by using mixed mode bending tests M.Z. Sadeghi a *, J. Zimmermann a , K. Saravana a , A. Gabener b A. Dafnis a , K. U. Schröder a a Institute of Structural Mechanics and Lightweight Design, RWTH Aachen University, Wuellnerstrasse 7, 52062 Aachen, Germany b Saint-Gobain Performance Plastics Pampus GmbH, Am Nordkanal 37, D-47877, Willich, Germany Abstract Critical strain energy release rate (Gc) is considered as an important fracture characteristic parameter by which the state of integrity of the bonded structures can be assessed. Although the majority of bonded components in industrial applications are under mixed- mode loading, fracture characterization of adhesives in mixed-mode loadings has received much less attention in the literature compared with pure mode I and II. Besides, there are still open questions regarding influential parameters on fracture characterization of adhesives (such as adhesive layer thickness), especially when in some cases the numerical results are not in agreement with the experimental results. In this work, the values of fracture toughness of a ductile adhesive are determined by mixed-mode bending (MMB) tests with different thickness. Based on the determined values for fracture toughness, the fracture envelopes of the adhesive for different thickness were developed. The developed fracture envelopes were used as input for FE modelling of single lap joints (SLJ) with different adhesive thicknesses to investigate the applicability of each of the developed fracture envelopes in FE failure load prediction of experimentally tested SLJs.
Influence of fracture envelope on FE failure load prediction of adhesively bonded joints by using mixed mode bending tests
May 28, 2023
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