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Open AccessArticle

Flexural Progressive Failure of Carbon/Glass Interlayer and Intralayer Hybrid Composites

by Qingtao Wang 1, Weili Wu 1, Zhili Gong 2 and Wei Li 1,3,4,*
1
College of Textiles, Donghua University, No. 2999, Northern Renmin Rd, Songjiang District, Shanghai 201620, China
2
Shanghai Starriver Bilingual School, No. 2588, Jindu Street, Minhang District, Shanghai 201100, China
3
Key Lab of Textile Science & Technology, Ministry of Education, No. 2999, Northern Renmin Rd, Songjiang District, Shanghai 201620, China
4
Center for Civil Aviation Composites, No. 2999, Northern Renmin Rd, Songjiang District, Shanghai 201620, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(4), 619; https://doi.org/10.3390/ma11040619
Received: 28 March 2018 / Revised: 12 April 2018 / Accepted: 16 April 2018 / Published: 17 April 2018
(This article belongs to the Special Issue Damage Detection and Characterization of High Performance Composites)
The flexural progressive failure modes of carbon fiber and glass fiber (C/G) interlayer and intralayer hybrid composites were investigated in this work. Results showed that the bending failure modes for interlayer hybrid composites are determined by the layup structure. Besides, the bending failure is characterized by the compression failure of the upper layer, when carbon fiber tends to distribute in the upper layer, the interlayer hybrid composite fails early, the failure force is characterized by a multi-stage slightly fluctuating decline and the fracture area exhibits a diamond shape. While carbon fiber distributes in the middle or bottom layer, the failure time starts late, and the failure process exhibits one stage sharp force/stress drop, the fracture zone of glass fiber above the carbon layers presents an inverted trapezoid shape, while the fracture of glass fiber below the carbon layers exhibits an inverted triangular shape. With regards to the intralayer hybrid composites, the C/G hybrid ratio plays a dominating role in the bending failure which could be considered as the mixed failures of four structures. The bending failure of intralayer hybrid composites occurs in advance since carbon fiber are located in each layer; the failure process shows a multi-stage fluctuating decline, and the decline slows down as carbon fiber content increases, and the fracture sound release has the characteristics of a low intensity and high frequency for a long time. By contrast, as glass fiber content increases, the bending failure of intralayer composites is featured with a multi-stage cliff decline with a high amplitude and low frequency for a short-time fracture sound release. View Full-Text
Keywords: carbon/glass hybrid composites; interlayer hybrid; intralayer hybrid; flexural properties; progressive failure carbon/glass hybrid composites; interlayer hybrid; intralayer hybrid; flexural properties; progressive failure
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Wang, Q.; Wu, W.; Gong, Z.; Li, W. Flexural Progressive Failure of Carbon/Glass Interlayer and Intralayer Hybrid Composites. Materials 2018, 11, 619.

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