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A novel understanding of the normalized fatigue delamination model for composite multidirectional laminates

Yu, Gong, Wangchang, Li, Hao, Liu, Suzhen, Yuan, Wu, Zhangming and Chuanzeng, Zhang 2019. A novel understanding of the normalized fatigue delamination model for composite multidirectional laminates. Composite Structures 229 , 111395. 10.1016/j.compstruct.2019.111395

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Abstract

Normalized fatigue delamination models have been widely applied by researchers in the characterization of the fatigue delamination behavior of composite laminates. However, the inherent mechanism of this normalization method has not been explored. This study aims to present a physical understanding on the normalized fatigue delamination model from a viewpoint of energy. The fatigue delamination behavior is considered to be governed by the driving force and delamination resistance, and based on this principle the physical mechanism of the fatigue delamination is studied. A new physics-based normalized fatigue delamination model is proposed in this paper. In order to experimentally validate the proposed fatigue delamination model, mode I fatigue delamination tests are performed on double cantilever beam specimens to obtain the experimental data with different amounts of the fiber bridging. The results show that the normalized model is suitable to accurately characterize the fatigue delamination behavior of the composite laminates by using a single master curve. The master curve is finally employed as a standard approach to predict the fatigue results. Good agreement between the predicted and the experimental results is achieved, therefore it approves the applicability of the proposed fatigue delamination model in characterizing the fatigue delamination growth behavior.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Publisher: Elsevier
ISSN: 0263-8223
Date of First Compliant Deposit: 23 September 2019
Date of Acceptance: 9 September 2019
Last Modified: 11 Sep 2020 02:05
URI: http://orca-mwe.cf.ac.uk/id/eprint/125481

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