Study on toughness improvement of a rosin-sourced epoxy matrix composite for green aerospace application

Hu, Dongyuan, Zhang, Xvfeng, Liu, Xiaoling, Qin, Zhen, Hu, Li, Rudd, Chris and Yi, XiaoSu (2020) Study on toughness improvement of a rosin-sourced epoxy matrix composite for green aerospace application. Journal of Composites Science, 4 (4). p. 168. ISSN 2504-477X

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A high temperature epoxy resin was formulated by using a rosin-sourced anhydride-type curing agent, i.e., maleopimaric acid (RAM), and a two-component epoxy consisting of an E51-type epoxy and a solid phenolic epoxy to form a bio-sourced green matrix resin. The glass transition temperature of the final resin was 238◦C Carbon fiber composite prepreg and was manufactured and laminated into composite specimens. Interleaving Toughening Technology (ITT) was applied to the laminates by using Polyamide interleaf veils. The interlaminar fracture toughness and compression after impact (CAI) strength were investigated and showed that the opening Mode I interlaminar fracture toughness GIC and the Mode II interlaminar fracture toughness GIIC of the specimens with interleaves were significantly improved from 227.51 J/m2 to 509.22 J/m2 and 1064.3 J/m2 to 1510.8 J/m2, respectively. Correspondingly, the drop-weight impact test shows that the interleaves reduced the impact damage area from 20.9% to 11.3% of the total area, and the CAI residual strength was increased from 144 MPa to 191 MPa. Meanwhile, mechanical tests showed that the in-plane properties of the interleaved laminates were slightly reduced due to carbon fiber volume fraction reduction. In conclusion, the high glass transition temperature, fracture toughness and CAI behaviour make the green resin matrix composite a potential candidate for aerospace applications.

Item Type: Article
Keywords: rosin-sourced epoxy resin; interleaving toughening; glass transition temperature; toughness; CAI; in-plane mechanical properties
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number:
Depositing User: Wu, Cocoa
Date Deposited: 04 Jun 2021 08:03
Last Modified: 04 Jun 2021 08:03

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