Coupled mixed-mode cohesive zone modeling of interfacial debonding stresses in simply supported plated beams

De Lorenzis, Laura, Fernando, Dilum and Teng, Jin-Guang (2013) Coupled mixed-mode cohesive zone modeling of interfacial debonding stresses in simply supported plated beams. International Journal of Solids and Structures, 50 14-15: 2477-2494. doi:10.1016/j.ijsolstr.2013.03.035

Author De Lorenzis, Laura
Fernando, Dilum
Teng, Jin-Guang
Title Coupled mixed-mode cohesive zone modeling of interfacial debonding stresses in simply supported plated beams
Journal name International Journal of Solids and Structures   Check publisher's open access policy
ISSN 0020-7683
Publication date 2013-07
Sub-type Article (original research)
DOI 10.1016/j.ijsolstr.2013.03.035
Volume 50
Issue 14-15
Start page 2477
End page 2494
Total pages 18
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2014
Language eng
Formatted abstract
The development of predictive models for plate end debonding failures in beams strengthened with thin soffit plates is a topic of great practical relevance. After the early stress-based formulations, fracture mechanics approaches have become increasingly established. More recently, the cohesive zone (CZ) model has been successfully adopted as a bridge between the stress- and fracture mechanics-based treatments. However, the few studies of this nature propose complex formulations which can only be implemented numerically. To date, the only available analytical solution based on CZ modeling for the prediction of interfacial stresses/debonding in plated beams is limited to the determination of interfacial shear stresses and thus neglects the mixed-mode effects generated by the presence of interfacial normal stresses at the plate end. This paper presents a new analytical formulation based on the CZ modeling approach for the prediction of plate end debonding in plated beams. A key enhancement with respect to the previous solution is the use of a coupled mixed-mode CZ model, which enables a full account of mixed-mode effects at the plate end. The model describes the evolution of the interface after the end of the elastic regime, and predicts the value of the load at incipient debonding. The achievement of a closed-form solution for this quite complex case entails the introduction of a crucial simplifying assumption, as well as the ad hoc modeling of an effective cohesive interfacial response. The paper presents the analytical theory and compares its predictions with numerical and experimental results.
Keyword Cohesive zone modeling
Interfacial stresses
Mixed-mode fracture
Plated beams
Cohesive zone modeling; Interfacial stresses; Mixed-mode fracture; Plated beams; Plate end debonding
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Authors prepress title: "Coupled mixed-mode cohesive zone modeling of interfacial stresses in plated beams".

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 13 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 15 times in Scopus Article | Citations
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Created: Mon, 16 Sep 2013, 10:41:13 EST by Dilum Fernando on behalf of School of Civil Engineering