Next Article in Journal
Identification of Resveratrol as Bioactive Compound of Propolis from Western Romania and Characterization of Phenolic Profile and Antioxidant Activity of Ethanolic Extracts
Next Article in Special Issue
Location of Tensile Damage Source of Carbon Fiber Braided Composites Based on Two-Step Method
Previous Article in Journal
Effect of Nanocrystallization of Anthocyanins Extracted from Two Types of Red-Fleshed Apple Varieties on Its Stability and Antioxidant Activity
Open AccessFeature PaperArticle

Improving Interlaminar Fracture Toughness and Impact Performance of Carbon Fiber/Epoxy Laminated Composite by Using Thermoplastic Fibers

1
Tianjin and Ministry of Education Key Laboratory for Advanced Textile Composite Materials, Tiangong University, Tianjin 300387, China
2
School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Youhong Tang
Molecules 2019, 24(18), 3367; https://doi.org/10.3390/molecules24183367
Received: 30 August 2019 / Revised: 12 September 2019 / Accepted: 13 September 2019 / Published: 16 September 2019
(This article belongs to the Special Issue Fibre Reinforced Composites: Interfacial Modifications and Property)
The effects of thermoplastic polyimide (PI) and polypropylene (PP) fibers and areal density of toughened layer on interlaminar fracture toughness and impact performance of carbon fiber/epoxy (CF/EP) laminated composites were studied. Mode I interlaminar fracture toughness (GIC) was analyzed via double cantilever beam (DCB) tests. When comparing for the toughener type, PI played a positive role in enhancing the mode-I fracture toughness, while PP was not effective due to the less fiber bridge formed during composite curing. The toughening effects of areal density of PI were further investigated by end notched flexure (ENF) testing and low velocity impact testing to better understand the toughening mechanisms. The results revealed that the toughening effect reached its best effectiveness when the areal density of toughened layer was 30 g/m2. Compared with the control group, GIC and GIIC of CF/EP laminated composite were increased by 98.49% and 84.07%, and Fmax and Ee were enhanced by 92.38% and 299.08% under low velocity impact. There is no obvious delamination phenomenon on the surface of laminates after low velocity impact, indicating the improved interlaminar and impact performance of laminated composite. View Full-Text
Keywords: interlaminar fracture toughness; impact performance; thermoplastic polyimide; laminated composite; carbon fiber interlaminar fracture toughness; impact performance; thermoplastic polyimide; laminated composite; carbon fiber
Show Figures

Graphical abstract

MDPI and ACS Style

Chen, L.; Wu, L.-W.; Jiang, Q.; Tian, D.; Zhong, Z.; Wang, Y.; Fu, H.-J. Improving Interlaminar Fracture Toughness and Impact Performance of Carbon Fiber/Epoxy Laminated Composite by Using Thermoplastic Fibers. Molecules 2019, 24, 3367.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop