Mechanical Properties of Self-Healing Carbon Fibre Fabric Reinforced Polymers (CFFRP)

2013 ◽  
Vol 700 ◽  
pp. 107-110
Author(s):  
Eng Har Lim ◽  
Kim Pickering
Keyword(s):  
Carbon Fibre ◽  
Composite Laminates ◽  
Failure Strain ◽  
Tensile Modulus ◽  
Flexural Properties ◽  
Self Healing ◽  
Reinforced Polymers ◽  
Fabric Composite ◽  
Healing Agent ◽  
Flexural Tests

In this paper, carbon fibre fabric reinforced polymeric composites with the capability of self-healing were studied. These fabric-composite laminates were fabricated by hand lay-up of plain weave (PW) carbon fibre fabrics impregnated with polymer blends of epoxy resin and thermoplastic healing agent. Laminates containing different amounts of healing agent (0, 10wt% and 20wt% by weight of epoxy) were evaluated by tensile and three-point flexural tests according to the ASTM D3039/D3039M and D790, respectively. Aside of the potential for self-healing, benefits were found in terms of tensile and flexural properties. Overall, tensile properties were improved with addition of thermoplastic healing agent; the highest tensile strength and failure strain were obtained with the highest healing agent amount (20wt%) whilst the maximum tensile modulus was obtained at 10wt%. In general, flexural properties were also improved except flexural strain; the highest flexural strength and modulus were determined at 10wt%.

Flexural properties of sandwich composite laminates reinforced with glass and carbon Z-pins

2018 ◽  
Vol 53 (10) ◽  
pp. 1347-1359 ◽  
Author(s):  
Erdem Selver ◽  
Gaye Kaya
Keyword(s):  
Carbon Fibre ◽  
Composite Laminates ◽  
Interfacial Bonding ◽  
Sandwich Composite ◽  
Flexural Properties ◽  
Sandwich Composites ◽  
Flexural Behaviour ◽  
Face Type ◽  
Carbon Rods ◽  
Glass Rods

This study aims to enhance the flexural properties of sandwich composites made from glass or carbon face and glass and carbon fibre Z-pin inserted extruted-polystyrene (XPS) foam cores. Carbon and glass pins were placed through XPS foams with two different column and row densities (15 and 30 mm). Results indicated that flexural loads, strength and modulus of glass/XPS and carbon/XPS sandwich composites significantly increased after inserting of glass and carbon rods. Core shear strengths and facing stresses of glass/XPS and carbon/XPS increased by increasing of carbon or glass rod densities. The rod type, rod density and face type of the sandwich composites are considered as significant parameters which affect the flexural behaviour of sandwich composites while using carbon rods enhanced flexural properties more than that of using glass rods due to better interfacial bonding.

scholarly journals Enhancement of Mechanical Properties of Flax-Epoxy Composite with Carbon Fibre Hybridisation for Lightweight Applications

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 109 ◽  
Author(s):  
Hom Nath Dhakal ◽  
Mohini Sain
Keyword(s):  
Carbon Fibre ◽  
Tensile Properties ◽  
Composite Laminates ◽  
Failure Modes ◽  
Epoxy Composite ◽  
Hybrid Composites ◽  
Environmental Scanning Electron Microscopy ◽  
Tensile Modulus ◽  
Tensile Tests ◽  
Flax Fibre

The effect of unidirectional (UD) carbon fibre hybridisation on the tensile properties of flax fibre epoxy composite was investigated. Composites containing different fibre ply orientations were fabricated using vacuum infusion with a symmetrical ply structure of 0/+45/−45/90/90/−45/+45/0. Tensile tests were performed to characterise the tensile performance of plain flax/epoxy, carbon/flax/epoxy, and plain carbon/epoxy composite laminates. The experimental results showed that the carbon/flax fibre hybrid system exhibited significantly improved tensile properties over plain flax fibre composites, increasing the tensile strength from 68.12 MPa for plain flax/epoxy composite to 517.66 MPa (670% increase) and tensile modulus from 4.67 GPa for flax/epoxy to 18.91 GPa (305% increase) for carbon/flax hybrid composite. The failure mechanism was characterised by examining the fractured surfaces of tensile tested specimens using environmental scanning electron microscopy (E-SEM). It was evidenced that interactions between hybrid ply interfaces and strain to failure of the reinforcing fibres were the critical factors for governing tensile properties and failure modes of hybrid composites.

scholarly journals Low-velocity Impact and Flexural Properties of Thermoplastic Polyurethane/Woven Glass Fabric Composite Laminates

2016 ◽  
Vol 167 ◽  
pp. 190-196 ◽  
Author(s):  
Pietro Russo ◽  
Antonio Langella ◽  
Ilaria Papa ◽  
Giorgio Simeoli ◽  
Valentina Lopresto
Keyword(s):  
Composite Laminates ◽  
Thermoplastic Polyurethane ◽  
Low Velocity Impact ◽  
Glass Fabric ◽  
Flexural Properties ◽  
Low Velocity ◽  
Velocity Impact ◽  
Fabric Composite

Strain rate-dependent characterization of carbon fibre-reinforced composite laminates using four-point bending tests

2019 ◽  
Vol 39 (5-6) ◽  
pp. 165-174
Author(s):  
JF Rojas-Sanchez ◽  
T Schmack ◽  
B Boesl ◽  
R Bjekovic ◽  
F Walther
Keyword(s):  
Carbon Fibre ◽  
Strain Rate ◽  
Composite Laminates ◽  
Tensile Modulus ◽  
Bending Tests ◽  
Reinforced Plastics ◽  
Rate Dependent ◽  
Four Point Bending ◽  
Carbon Fibre Reinforced Plastics

This research addresses the problem of accurately quantifying the strain rate effect of carbon fibre-reinforced plastics by proposing a method with a simple specimen manufacturing and experiment execution based on four-point bending tests. By easing the strain rate-dependent characterization of carbon fibre-reinforced plastics, less conservative designs can be achieved. The method proposed uses Euler–Bernoulli and Timoshenko’s beam theories to obtain the longitudinal compressive and tensile modulus, compressive strength, shear modulus, and shear yielding point. Transverse properties could not be obtained due to limitations of the fixture employed. A strain-dependent material characterization was done using the proposed method and compared to the characterization of the same material using traditional uniaxial tests. Most of the material properties obtained with different methods correlated within approximately 10%. More work needs to be done to determine how this discrepancy affects simulation results.

The self-healing investigations on fiber-reinforced polymer composites through a novel compartmented microcapillary approach

2021 ◽  
pp. 096739112098574
Author(s):  
Deepak Jain ◽  
Aviral Gupta ◽  
Sumit Mahajan
Keyword(s):  
Polymer Composites ◽  
Fiber Reinforced Polymer ◽  
Self Healing ◽  
Fiber Reinforced ◽  
Frp Composites ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Potential Applications ◽  
Healing Agent ◽  
Flexural Tests

This paper presents the experimental self-healing investigations on fiber-reinforced polymer (FRP) composites using a novel in-situ healing approach. During the preparation of polymer composites, the monomer Dicyclopentadiene (DCPD) was embedded as the healing agent. The compartment hollow glass microcapillaries were used to serve the localized distribution of the healing agent. To determine the viability of the proposed microcapillary approach, several flexural tests were conducted to initiate the damage and subsequent realization of self-repair activity. The healing was initiated through the polymerization of DCPD in the presence of Grubb’s catalyst (first and second generation). Once healed, the specimens were tested cyclically to evaluate the recovery of flexural strength. A post-failure healing efficiency as high as 72% has been observed. SEM and XRD investigations have been conducted for the microstructural investigations. These investigations support the potential applications of the proposed concept of embedding the bulk with the microcapillaries.

Tensile and flexural properties of glass and carbon fibre composites reinforced with silica nanoparticles and polyethylene glycol

2019 ◽  
Vol 49 (6) ◽  
pp. 809-832
Author(s):  
Erdem Selver
Keyword(s):  
Polyethylene Glycol ◽  
Carbon Fibre ◽  
Silica Nanoparticles ◽  
Composite Laminates ◽  
Shear Thickening ◽  
Flexural Properties ◽  
Fibre Composites ◽  
Fabric Composites ◽  
Shear Thickening Fluids ◽  
Carbon Fibre Composites

This paper attempts to show the effect of silica nanoparticles and polyethylene glycol mixture (shear thickening fluids) on tensile and flexural properties (3-point bending) of glass and carbon fibre-reinforced thermoset composite laminates. The shear thickening fluids were prepared by combination of silica nanoparticles and polyethylene glycol using various silica contents (10–20 wt%). A viscometer was used to evaluate the shear thickening characteristics and viscosity of shear thickening fluids increased by increasing the silica content. Shear thickening fluids were impregnated on the host of glass and carbon fabrics and subsequently converted to composite laminates using vacuum infusion method with an epoxy matrix. It was found that shear thickening fluids-treated carbon and glass fabric composites exhibited up to 10% and 12% higher tensile strength than neat composites whilst the tensile modulus increased about 24%. Shear thickening fluids-treated fabric composites exhibited slower damage propagation compared to brittle nature of untreated fabric composites. However, lower flexural strength with higher energy absorption (up to 27%) were obtained after using shear thickening fluids for both carbon and glass fibre composites.

The system of carbon fibre-reinforced plastics micro-tubes for self-healing of glass fibre-reinforced plastics laminates

2016 ◽  
Vol 51 (12) ◽  
pp. 1717-1727 ◽  
Author(s):  
Sergejs Vidinejevs ◽  
Andrey Aniskevich
Keyword(s):  
Shear Strength ◽  
Carbon Fibre ◽  
Symmetry Plane ◽  
Interlaminar Shear Strength ◽  
Self Healing ◽  
Reinforced Plastics ◽  
Static Indentation ◽  
Healing Agent ◽  
Interlaminar Shear ◽  
Carbon Fibre Reinforced Plastics

A system of pultruded carbon fibre-reinforced plastics micro-tubes is used for self-healing simulation in laminated polymer composite. The system consists of a package of micro-tubes, placed in the symmetry plane of the GFR/epoxy laminate stack. Healing agent is a mixture of the epoxy resin and hardener. The healing agent releases and penetrates into the cracks after the composite is damaged by the quasi-static indentation. The specimens are healed at 30℃ for 24 h. Rectangular specimens notched under ASTM D2733 have been subjected to tensile test to determine interlaminar shear strength. Shear strength of specimens has been compared in three states (virgin, damaged and healed) for various ways of healing. After the most effective self-healing, the interlaminar shear strength has been recovered to 70 ± 15% of those for virgin specimens that almost twice exceeds the residual strength of the damaged specimens.

Impact Behaviour of Hybrid Carbon Fibre Composites Reinforced with Silica Micro- and Functionalized Nanoparticles

2018 ◽  
Vol 21 ◽  
pp. 1-9 ◽  
Author(s):  
Júlio Cesar dos Santos ◽  
Luciano Machado Gomes Vieira ◽  
Túlio Hallak Panzera ◽  
Rodrigo Teixeira Santos Freire ◽  
André Luis Christoforo ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Composite Laminates ◽  
Microstructural Analysis ◽  
Impact Resistance ◽  
Tensile Modulus ◽  
Pull Out ◽  
Factorial Design Of Experiments ◽  
The Impact ◽  
Carbon Fibre Composites ◽  
Hybrid Carbon

This work investigates the effect of silica nanoparticles functionalized with poly-diallyldimethylammonium chloride (PDDA) and silica microparticle inclusions (1.0 wt% and 3.5 wt%) on the impact resistance of hybrid carbon fibre reinforced composite laminates (HCFRCs) and tensile modulus of particle reinforced polymers (PRPs) via Full-Factorial Design of Experiments. The data were analysed with Analysis of Variance (ANOVA). The inclusion of particles led to reduced impact absorption of HCFRCs, except for composites with 1.0 wt% of silica in microscale, which provides an increase of 11.75% in the impact resistance. Microstructural analysis of fractured impact samples revealed pull-out as the predominant fracture mode in 1.0 wt% silica microparticle composites. Such mechanism leads to impact energy dissipation which may explain the increased impact resistance of these samples.

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