Rate dependence of mode I fracture behaviour in carbon-fibre/epoxy composite laminates

1998 ◽  
Vol 58 (3-4) ◽  
pp. 591-602 ◽  
Author(s):  
Takayuki Kusaka ◽  
Masaki Hojo ◽  
Yiu-Wing Mai ◽  
Tomoaki Kurokawa ◽  
Taketoshi Nojima ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Composite Laminates ◽  
Fracture Behaviour ◽  
Epoxy Composite ◽  
Rate Dependence ◽  
Mode I ◽  
Mode I Fracture

scholarly journals Modification of Carbon Fibre/Epoxy Composites by Polyvinyl Alcohol (PVA) Based Electrospun Nanofibres

2016 ◽  
Vol 25 (3) ◽  
pp. 096369351602500 ◽  
Author(s):  
Bertan Beylergi̇l ◽  
Metin Tanoğlu ◽  
Engin Aktaş
Keyword(s):  
Fracture Toughness ◽  
Polyvinyl Alcohol ◽  
Carbon Fibre ◽  
Composite Laminates ◽  
Mechanical Performance ◽  
Epoxy Composite ◽  
Epoxy Composites ◽  
Mode I ◽  
Mode I Fracture Toughness ◽  
Electrospun Nanofibres

In this study, the effects of modifying interlaminar region of unidirectional carbon fibre/epoxy composites by the incorporation of electrospun polyvinyl alcohol (PVA) nanofibres were investigated. PVA nanofibres were directly deposited onto the carbon fabrics by electrospinning method to improve mechanical performance of those composites. The features of the electrospun nanofibres were characterized by microscopy techniques. The unidirectional carbon fibre/epoxy composite laminates with/without PVA nanofibre interlayers were manufactured by vacuum-infusion technique in a [0]4 configuration. Tensile, three-point bending, compression, Charpy-impact and Mode-I fracture toughness tests (Double Cantilever Beam (DCB)) were carried out in accordance with ASTM standards to evaluate mechanical performance of the composites. Scanning electron microscopy (SEM) observations were made on the specimens to evaluate microstructural features. It was observed that the carbon fabrics were successfully coated with a thin layer of PVA nanofibres by electrospinning technique. The results showed that PVA nanofibres improve the mechanical properties of unidirectional carbon/epoxy composite laminates when subjected to in-plane loading. On the other hand, PVA nanofibres slightly reduced the mode-I fracture toughness values although they led to more stable crack propagation.

A novel Mode I fracture test for stitched composite laminates

2000 ◽  
Author(s):  
Leishan Chen ◽  
Peter Ifju ◽  
Bhavani Sankar
Keyword(s):  
Composite Laminates ◽  
Mode I ◽  
Fracture Test ◽  
Mode I Fracture

scholarly journals Comparative study of elastic properties and mode I fracture energy of carbon nanotube/epoxy and carbon fibre/epoxy laminated composites

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Jyotikalpa Bora ◽  
Sushen Kirtania
Keyword(s):  
Carbon Nanotube ◽  
Carbon Fibre ◽  
Fracture Energy ◽  
Elastic Properties ◽  
Volume Fraction ◽  
Laminated Composites ◽  
Laminated Composite ◽  
Fe Analysis ◽  
Mode I ◽  
Mode I Fracture

Abstract A comparative study of elastic properties and mode I fracture energy has been presented between conventional carbon fibre (CF)/epoxy and advanced carbon nanotube (CNT)/epoxy laminated composite materials. The volume fraction of CNT fibres has been considered as 15%, 30%, and 60% whereas; the volume fraction of CF has been kept constant at 60%. Three stacking sequences of the laminates viz.[0/0/0/0], [0/90/0/90] and [0/30/–30/90] have been considered in the present analysis. Periodic microstructure model has been used to calculate the elastic properties of the laminated composites. It has been observed analytically that the addition of only 15% CNT in epoxy will give almost the same value of longitudinal Young’s modulus as compared to the addition of 60% CF in epoxy. Finite element (FE) analysis of double cantilever beam specimens made from laminated composite has also been performed. It has been observed from FE analysis that the addition of 15% CNT in epoxy will also give almost the same value of mode I fracture energy as compared to the addition of 60% CF in epoxy. The value of mode I fracture energy for [0/0/0/0] laminated composite is two times higher than the other two types of laminated composites.

Test and Analysis of Modes I, II and Mixed-Mode I/II Delamination for Carbon/Epoxy Composite Laminates

2019 ◽  
Vol 20 (3) ◽  
pp. 636-652 ◽  
Author(s):  
Hongsu Bae ◽  
Minsong Kang ◽  
Kyeongsik Woo ◽  
In-Gul Kim ◽  
Kyung-hwan In
Keyword(s):  
Composite Laminates ◽  
Mixed Mode ◽  
Epoxy Composite ◽  
Mode I

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.

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