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Title: Investigation of biaxial properties of CFRP with the novel-designed cruciform specimens
Authors: Zhang, Xiaowen
Zhu, Haiyang
Lv, Zhixing
Zhao, Xiangrun
Wang, Junwei
Wang, Qi
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2022
Source: Zhang, X., Zhu, H., Lv, Z., Zhao, X., Wang, J. & Wang, Q. (2022). Investigation of biaxial properties of CFRP with the novel-designed cruciform specimens. Materials, 15(19), 7034-.
Journal: Materials
Abstract: The biaxial loading properties of carbon-fiber-reinforced polymer (CFRP) are critical for evaluating the performance of composite structures under the complex stress state. There are currently no standardized specimens for the CFRP biaxial experiments. This work developed a new design criterion for the cruciform specimen coupled with the Hashin criterion. The finite element analysis was conducted to investigate the effect of geometric parameters on the stress distribution in the test area. The embedded continuous laying method (ECLM) was proposed to achieve the thinning of the center of the test region without introducing defects. The manufacturing quality of the cruciform specimens was verified by the ultrasonic C-scanning test. The biaxial test platform consisting of the biaxial loading system, digital image correlation (DIC) system, strain electrical measurement system, and acoustic emission detection system was constructed. The biaxial tensile tests under different biaxial loading ratios were conducted. The results showed that the biaxial failure efficiently occurred in the test area of the cruciform specimens designed and manufactured in this paper. The failure modes and morphology were characterized using macro/microscopic experimental techniques. The biaxial failure envelope was obtained. The results can be used to guide the design of composite structures under biaxial stress.
ISSN: 1996-1944
DOI: 10.3390/ma15197034
Schools: School of Electrical and Electronic Engineering 
Rights: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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