Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings

Zhang, Kai; Sun, Yongyang; Wang, Fangxin; Liang, Wenyan; Wang, Zhenqing

doi:10.3390/polym12081809

Submit to this Journal Review for this Journal Edit a Special Issue

Article Menu

...

Open AccessArticle

Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings

^1,2,

¹,

^1,2

^1,* and

College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China

Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore

Author to whom correspondence should be addressed.

Polymers 2020, 12(8), 1809; https://doi.org/10.3390/polym12081809

Received: 22 July 2020 / Revised: 8 August 2020 / Accepted: 9 August 2020 / Published: 12 August 2020

View Full-Text Download PDF

Browse Figures

Citation Export

Abstract

As a type of environmentally-friendly and low-cost natural material, bamboo fibers exhibit excellent mechanical properties. In this study, a bamboo fiber reinforced polybenzoxazine composite was fabricated by an improved hot-pressing process. The dynamic compressive behaviors of neat benzoxazine and its composite were comparatively studied by an SHPB (split Hopkinson pressure bar) apparatus. SHPB tests showed that the benzoxazine matrix and its composite exhibited significantly positive strain rate sensitivity at nominal strain rates in the range of 0.006–2500/s. During the impact loadings, the progressive deformation and failure of neat benzoxazine and bamboo composite were investigated by capturing real-time images with a high-speed camera. In comparison with neat benzoxazine, the bamboo composite had slightly higher maximum compressive stress under the same strain rates. It is noteworthy that the crashworthiness of the composite was remarkably better than that of neat benzoxazine due to the incorporation of bamboo fibers. For example, the energy absorption of bamboo composite was 105.7% higher than that of neat benzoxazine at a strain rate of 2500/s. The dynamic compressive properties of benzoxazine resin were much better than most of the conventional thermosetting resins. These results could guide the future application of this kind of composites. View Full-Text

Keywords: bamboo fiber; benzoxazine resin; strain rate effect; mechanical properties; progressive failure; energy absorption

▼ Show Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Share and Cite

MDPI and ACS Style

Zhang, K.; Sun, Y.; Wang, F.; Liang, W.; Wang, Z. Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings. Polymers 2020, 12, 1809. https://doi.org/10.3390/polym12081809

AMA Style

Zhang K, Sun Y, Wang F, Liang W, Wang Z. Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings. Polymers. 2020; 12(8):1809. https://doi.org/10.3390/polym12081809

Chicago/Turabian Style

Zhang, Kai, Yongyang Sun, Fangxin Wang, Wenyan Liang, and Zhenqing Wang. 2020. "Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings" Polymers 12, no. 8: 1809. https://doi.org/10.3390/polym12081809

Find Other Styles

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Abstract views Pdf views Html views

Article Menu

Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Article Access Map by Country/Region

Further Information

Guidelines

MDPI Initiatives

Follow MDPI