Analysis of low-velocity impact resistance of carbon fiber reinforced polymer composites based on the content of incorporated graphite fluoride

Leng, Jing; Guo, Tianzi; Yang, Meng; Guo, Zeshi; Fang, Zhengqin; Liu, Zhipeng; Li, Dandan; Sun, Dazhi

2020

10.3390/ma13010187

Materials   影响因子和分区

19961944

1996-1944

As a graphite derivative, graphite fluoride (GrF) has a remarkable fracture toughness improvement effect on epoxy materials. The fracture toughness variation of the epoxy could exert an influence on the low velocity impact resistance of the corresponding carbon fiber reinforced polymer (CFRP) composite. Therefore, the dependence of the low velocity impact resistance of the incorporated CFRP on the GrF content is worth analyzing. Here, different contents of GrF were applied to incorporate CFRP laminates and planned to find the optimal GrF content, in turn leading to the best impact resistance. Using a drop-weight impact test, the load vs. time curves and load vs. displacement curves were obtained. The incipient damage loads and maximum loads of various GrF contents of the samples were compared carefully. The absorbed energies during the impact process were calculated. The trend of absorbed energy decreased up to the 1 wt% sample, then increased significantly with the rise of GrF content. This deflection behavior can be explained by the combination of crack pinning, crack deflection and crack propagation, due to the rise in GrF content. Through the ultrasonic C-scan evaluation, the delamination areas of different GrF content of samples were measured. The trend of delamination area variation was accordant with the trend of absorbed energy variation. This presents a demonstration of the correlation between the absorbed energy and the damage level. The SEM images of the fracture surfaces were analyzed for the deflection behavior of the fracture toughness with various GrF contents. The plot of residual compression strength versus GrF content further indicated the 1 wt% was the optimal content at which the incorporated GrF endowed the most impact-resistant property to the CFRP laminates.
© 2020 by the authors.

CFRP composites impact resistance graphite fluoride

SCI ; EI

英语

第一 ; 通讯

Foundation of Shenzhen Science and Technology Innovation Committee[JCYJ20170817110440310] ; Foundation of Shenzhen Science and Technology Innovation Committee[KQJSCX20170726145415637]

Materials Science

Materials Science, Multidisciplinary

WOS:000515499300187

MDPI AG, Postfach, Basel, CH-4005, Switzerland

20200608134846

Carbon fiber reinforced plastics ; Cracks ; Fluorine compounds ; Graphite ; Impact resistance ; Reinforcement

Polymer Products:817.1 ; Materials Science:951

Web of Science

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen; 518055, China

Leng, Jing,Guo, Tianzi,Yang, Meng,et al. Analysis of low-velocity impact resistance of carbon fiber reinforced polymer composites based on the content of incorporated graphite fluoride[J]. Materials,2020,13(1).

Leng, Jing.,Guo, Tianzi.,Yang, Meng.,Guo, Zeshi.,Fang, Zhengqin.,...&Sun, Dazhi.(2020).Analysis of low-velocity impact resistance of carbon fiber reinforced polymer composites based on the content of incorporated graphite fluoride.Materials,13(1).

Leng, Jing,et al."Analysis of low-velocity impact resistance of carbon fiber reinforced polymer composites based on the content of incorporated graphite fluoride".Materials 13.1(2020).