Surface fracture analysis of glass fibre reinforced epoxy composites treated with different type of coupling agent

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Abstract

This study report the results of the investigation into the effects of surface adhesion on fracture properties of glass fibre reinforced epoxy composites. A series of interlaminar fracture tests under mode I loading conditions have been undertaken on glass fibre reinforced epoxy composites using the Double Cantilever Beam specimen. The fibrematrix interface was treated using epoxy silane and methacryl silane coupling agents of different concentrations. The experimental compliance data reduction technique was used to calculate the fracture energy for each set of samples. The fracture surface of the specimens were analysed using the scanning electron microscope. Results obtained show that the interphase region significantly influences the overall material behaviour of composites and methacryl silane gives a better adhesion between the fibre-matrix interphase. Concentrations of 1.0wt% methcryl silane agents gives the lowest value of GIC(propagation) of 216 J/m2. Observations made from the micrographs of the scanning electron microscope showed that failure for the specimen treated with lower concentrations of methacryl silane occurred at the fibre-matrix interface. Concentrations of 0.02wt% methcryl silane agents gives the highest value of GIC(propagation) of 728 J/m2. This might be due to the increase in degree of fibre-matrix adhesion in a glass fibre/epoxy composite by reducing the fibre bridging phenomena as shown by the fracture surfaces micrograph. For lower concentrations of methacryl silane, the failure occurred both at the fibre-matrix and matrix-matrix interface.

Original languageEnglish
Pages (from-to)55-65
Number of pages11
JournalEuropean Journal of Scientific Research
Volume29
Issue number1
Publication statusPublished - 2009

Fingerprint

Silanes
Epoxy
Coupling agents
composite materials
epoxides
Glass fibers
glass
Composite
Fiber
adhesion
Composite materials
scanning electron microscopes
interphase
matrix
Fibers
Adhesion
Interphase
Scanning Electron Microscope
compliance
Electron microscopes

Keywords

  • Coupling agent
  • Fracture properties
  • Scanning electron microscopy
  • Surface morphology

ASJC Scopus subject areas

  • General

Cite this

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abstract = "This study report the results of the investigation into the effects of surface adhesion on fracture properties of glass fibre reinforced epoxy composites. A series of interlaminar fracture tests under mode I loading conditions have been undertaken on glass fibre reinforced epoxy composites using the Double Cantilever Beam specimen. The fibrematrix interface was treated using epoxy silane and methacryl silane coupling agents of different concentrations. The experimental compliance data reduction technique was used to calculate the fracture energy for each set of samples. The fracture surface of the specimens were analysed using the scanning electron microscope. Results obtained show that the interphase region significantly influences the overall material behaviour of composites and methacryl silane gives a better adhesion between the fibre-matrix interphase. Concentrations of 1.0wt{\%} methcryl silane agents gives the lowest value of GIC(propagation) of 216 J/m2. Observations made from the micrographs of the scanning electron microscope showed that failure for the specimen treated with lower concentrations of methacryl silane occurred at the fibre-matrix interface. Concentrations of 0.02wt{\%} methcryl silane agents gives the highest value of GIC(propagation) of 728 J/m2. This might be due to the increase in degree of fibre-matrix adhesion in a glass fibre/epoxy composite by reducing the fibre bridging phenomena as shown by the fracture surfaces micrograph. For lower concentrations of methacryl silane, the failure occurred both at the fibre-matrix and matrix-matrix interface.",
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AB - This study report the results of the investigation into the effects of surface adhesion on fracture properties of glass fibre reinforced epoxy composites. A series of interlaminar fracture tests under mode I loading conditions have been undertaken on glass fibre reinforced epoxy composites using the Double Cantilever Beam specimen. The fibrematrix interface was treated using epoxy silane and methacryl silane coupling agents of different concentrations. The experimental compliance data reduction technique was used to calculate the fracture energy for each set of samples. The fracture surface of the specimens were analysed using the scanning electron microscope. Results obtained show that the interphase region significantly influences the overall material behaviour of composites and methacryl silane gives a better adhesion between the fibre-matrix interphase. Concentrations of 1.0wt% methcryl silane agents gives the lowest value of GIC(propagation) of 216 J/m2. Observations made from the micrographs of the scanning electron microscope showed that failure for the specimen treated with lower concentrations of methacryl silane occurred at the fibre-matrix interface. Concentrations of 0.02wt% methcryl silane agents gives the highest value of GIC(propagation) of 728 J/m2. This might be due to the increase in degree of fibre-matrix adhesion in a glass fibre/epoxy composite by reducing the fibre bridging phenomena as shown by the fracture surfaces micrograph. For lower concentrations of methacryl silane, the failure occurred both at the fibre-matrix and matrix-matrix interface.

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