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Experimental and numerical investigation of interface damage in composite L-angle sections under four-point bending

Zou, Xi; Yan, Shibo; Matveev, Mikhail; Rouse, James P.; Jones, I. Arthur

Authors

Xi Zou

Shibo Yan

Mikhail Matveev

James P. Rouse

I. Arthur Jones



Abstract

Curved laminates in aero-structures, such as the L-angle sections where webs and flanges meet, are prone to delamination due to high interlaminar stresses in these regions. Some efforts to investigate delamination in these structures can be found in the literature but commonly structures are limited to unidirectional layups or modelling approaches are constrained to the cohesive element based methods. In this work, multi-directional L-angle laminates were manufactured using unidirectional prepregs and tested under four-point bending load conditions to examine the interface damage. Acoustic emission technique was used to assist the capture of damage initiation and propagation. Three interface modelling strategies for predicting delamination, namely cohesive element, cohesive surface and perfectly bonded interface were used in the numerical study. The interface damage behaviour was successfully predicted by the simulation methods and differences among the strategies were compared.

Journal Article Type Article
Publication Date Jul 29, 2020
Journal Journal of Composite Materials
Print ISSN 0021-9983
Electronic ISSN 1530-793X
Publisher SAGE Publications
Peer Reviewed Peer Reviewed
APA6 Citation Zou, X., Yan, S., Matveev, M., Rouse, J. P., & Jones, I. A. (2020). Experimental and numerical investigation of interface damage in composite L-angle sections under four-point bending. Journal of Composite Materials, https://doi.org/10.1177/0021998320943659
DOI https://doi.org/10.1177/0021998320943659
Keywords Delamination; Curved laminate; Cohesive zone model; Damage initiation
Publisher URL http://www.uk.sagepub.com/journals/Journal201581

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