Artificial damage techniques for low velocity impact in carbon fibre composites

Abstract The present paper describes the results from experimental and theoretical modelling studies on the behaviour of continuous carbon fibre/polymer matrix composites subjected to a relatively low-velocity or high-velocity impact, using a rigid, metallic impactor. Drop-weight and gas-gun tests are employed to conduct the low-velocity and high-velocity impact experiments, respectively. The carbon fibre composites are based upon a thermoplastic poly(ether–ether ketone) matrix (termed CF/PEEK) or a thermoset toughened epoxy matrix (termed CF/Epoxy), which has the same fibre architecture of a cross-ply [03/903]2s lay-up. The studies clearly reveal that the CF/PEEK composites exhibit the better impact performance. Also, at the same impact energy of 10.5 ± 0.3 J, the relatively high-velocity test at 54.4 ± 1.0 m s−1 leads to more damage in both types of composite than observed from the low-velocity test where the impactor struck the composites at 2.56 m s−1. The computationally efficient, two-dimensional, elastic, finite element model that has been developed is generally successful in capturing the essential details of the impact test and the impact damage in the composites, and has been used to predict the loading response of the composites under impact loading.

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An Experimental Study on the Low Velocity Impact Response of Repaired Carbon Fibre/Benzoxazine Composites

Fibers and Polymers ◽

10.1007/s12221-019-8423-0 ◽

2019 ◽

Vol 20 (1) ◽

pp. 129-137 ◽

Cited By ~ 1

Author(s):

Na Li ◽

Lingfeng Sun ◽

Dong Chen

Keyword(s):

Experimental Study ◽

Carbon Fibre ◽

Impact Response ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact

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Low Velocity Impact Response of Carbon Fibre Laminates Made by Pulsed Infusion

Procedia Engineering ◽

10.1016/j.proeng.2014.11.149 ◽

2014 ◽

Vol 88 ◽

pp. 230-234 ◽

Cited By ~ 4

Author(s):

V. Antonucci ◽

M.R. Ricciardi ◽

F. Caputo ◽

A. Langella ◽

V. Lopresto ◽

...

Keyword(s):

Carbon Fibre ◽

Impact Response ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact

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Mechanical properties of carbon fibre reinforced composites modified with star-shaped butyl methacrylate

Journal of Composite Materials ◽

10.1177/00219983211065206 ◽

2022 ◽

pp. 002199832110652

Author(s):

Rochele Pinto ◽

Gediminas Monastyreckis ◽

Hamza Mahmoud Aboelanin ◽

Vladimir Spacek ◽

Daiva Zeleniakiene

Keyword(s):

Carbon Fibre ◽

Energy Absorption ◽

Low Velocity Impact ◽

Butyl Methacrylate ◽

Low Velocity ◽

Velocity Impact ◽

Reinforced Polymer ◽

Carbon Fibre Reinforced Polymer ◽

Star Shaped Polymer ◽

Fibre Reinforced Polymer

This article presents the possibility of strength improvement and energy absorption of carbon fibre reinforced polymer composites by matrix modification. In this study, the mechanical properties of bisphenol-A epoxy matrix and carbon fibre reinforced polymer composites were modified with four different wt.% of star-shaped polymer n-butyl methacrylate (P n-BMA) block glycidyl methacrylate (PGMA). The tensile strength of the epoxy with 1 wt.% star-shaped polymer showed 128% increase in comparison to unmodified epoxy samples. Two different wt.% were then used for the modification of carbon fibre-reinforced polymer composite samples. Tensile tests and low-velocity impact tests were conducted for characterising modified samples. Tensile test results performed showed a slight improvement in the tensile strength and modulus of the composite. Low-velocity impact tests showed that addition of 1 wt.% star-shaped polymer additives increase composite energy absorption by 53.85%, compared to pure epoxy composite specimens. Scanning electron microscopy (SEM) analysis of post-impact specimens displays fracture modes and bonding between the matrix and fibre in the composites. These results demonstrate the potential of a novel star-shaped polymer as an additive material for automotive composite parts, where energy absorption is significant.

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