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

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.

scholarly journals The Study of Impact Behaviour of Two Types of Glass Fibre Reinforced Polymer (GFRP) Subjected to Low Velocity Impact

2014 ◽  
Vol 1044-1045 ◽  
pp. 153-157 ◽  
Author(s):  
N. Razali ◽  
M.T.H. Sultan ◽  
Y. Aminanda
Keyword(s):  
Composite Material ◽  
Impact Energy ◽  
Glass Fibre ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

The aim of this work is to study the behaviour of two types of composite material when subjected to impacts at different energy levels under low velocity impact events. The composite material used in this study was Glass Fibre Reinforced Polymer (GFRP) which was C-type/600 g/m2 and E-type/600 g/m2. This material was fabricated to produce laminated plate specimens with a dimension of 100 mm 150 mm. Each specimen had 10 layers of GFRP woven roving plies. The low velocity impact test was performed using an IM10 Drop Weight Impact Tester with a 10 mm hemispherical striker cap. The impact energy was set to 14, 28, 42 and 56 joules with velocity ranging from 1.73 m/s to 3.52 m/s. The relationships of impact energy with impact force, displacement and energy absorbed are presented. The comparison and behaviour between the two types of GFRP are discussed.

Non-Destructive Testing of Carbon Fibre Reinforced Polymer (CFRP) Composite Using Thermosonic Technique

2020 ◽  
pp. 348-365
Author(s):  
Tanmoy Bose ◽  
N. S. V. N. Hanuman ◽  
Subhankar Roy
Keyword(s):  
Carbon Fibre ◽  
Local Defect ◽  
Low Velocity ◽  
Destructive Testing ◽  
Flat Bottom ◽  
Reinforced Polymer ◽  
Cfrp Plate ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Thermal Signature

Composite materials are often subjected to low velocity impacts which leads to delamination in subsequent layers. Linear ultrasound-based approaches are not accurate enough to detect it properly. The local defect resonance (LDR) based thermosonic is proved to be an efficient candidate for detection of such defects. LDR frequency excitation leads to high amplitude vibration which raises defect temperature drastically, detectable by an infrared camera. In this chapter, a numerical investigation of LDR frequency excited ultrasound thermography is carried out on delaminated carbon fibre reinforced polymer (CFRP) plate. The location and size of the delamination can be easily understood from thermal signature. The temperature gradient variation is found to be high at first and then it decreases due to higher heat conduction rate. The delamination in CFRP plate is detected by standard phased array ultrasound testing (PAUT) using flat bottom hole in aluminium plate as a case study. Delamination detection by PAUT is found to be very time consuming process compared with thermosonic technique.

Effect of winding angle on the quasi-static crushing behaviour of thin-walled carbon fibre-reinforced polymer tubes

2019 ◽  
Vol 28 (7) ◽  
pp. 462-472 ◽  
Author(s):  
Ma Quanjin ◽  
MRM Rejab ◽  
MS Idris ◽  
Shukur Abu Hassan ◽  
Nallapaneni Manoj Kumar
Keyword(s):  
Carbon Fibre ◽  
Energy Absorption ◽  
Reinforced Polymer ◽  
Average Maximum ◽  
Structural Applications ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Thin Walled ◽  
Cfrp Tubes ◽  
Winding Angle

Carbon fibre-reinforced polymer (CFRP) tubes have been increasingly used in various structural applications due to its lightweight and attractive crashworthiness performance. The key parameter of the winding angle plays an important role in the energy-absorbing performance of CFRP tubes. In order to understand the relationship between the compressive performance and winding angle, this article is aimed to study the effect of winding angle with ±45°, ±60° and ±75° of CFRP tubes. The thin-walled CFRP tubes were performed by the quasi-static compression test, which were fabricated using the wet winding technique. The result was concluded that as the winding angle increased, the compressive modulus showed the decreasing trend. In the view of energy absorption (EA) and specific energy absorption (SEA), it was exhibited the decreasing trend as the winding angle increased. It was noted that CFRP tubes with ±45° winding angle recorded the average maximum SEA of 24.67 kJ kg−1. Moreover, the crushing behaviour of thin-walled CFRP tubes were involved and studied.

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