Effect of brushing & abrading of laminae on the mode I fracture toughness of glass fiber/epoxy composite

Although fiber-reinforced polymers (FRP) have until now been largely applied to various fields of engineering, these materials have also been used in many technical applications, especially where high strength and stiffness are required, but with low component weight. Among various natural fibers, banana fiber is of particular interest in that its composites have high tensile strength, high tensile modulus, and low elongation at break beside its low cost and eases of availability. In this study, banana fiber and glass fiber reinforced polyester Resin composites were prepared using hand lay up technique . Experiments are conducted to compare and to find the effect of fiber volume fraction on mode I fracture toughness of both composites.

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Dynamic Fracture Toughness of a Unidirectional Graphite/Epoxy Composite

10.1115/imece2001/amd-25400 ◽

2001 ◽

Author(s):

C. Liu ◽

A. J. Rosakis ◽

M. G. Stout

Keyword(s):

Fracture Toughness ◽

Composite Material ◽

Crack Propagation ◽

Epoxy Composite ◽

Crack Tip ◽

Dynamic Crack Propagation ◽

Mode I ◽

Dynamic Crack ◽

Mode I Fracture ◽

Mode I Fracture Toughness

Abstract In this investigation, we studied the process of dynamic crack propagation in a fiber-reinforced composite material using the optical Coherent Gradient Sensing (CGS) technique combined with high-speed photography. The mode-I fracture toughness of the unidirectional graphite/epoxy composite, IM7/8551-7, as a function of the crack-tip speed, was measured quantitatively. It was found that up to the Rayleigh wave speed of the composite material, the mode-I fracture toughness is a decreasing function of the crack-tip velocity. This behavior is similar to that observed in the dynamic crack propagation along interfaces between two homogeneous solids.

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Tufting thread and density controls the mode-I fracture toughness in carbon/epoxy composite

Composite Structures ◽

10.1016/j.compstruct.2020.113272 ◽

2020 ◽

pp. 113272

Author(s):

Kundan K. Verma ◽

S.R. Viswamurthy ◽

Kotresh M. Gaddikeri ◽

S. Ramesh ◽

S. Kumar ◽

...

Keyword(s):

Fracture Toughness ◽

Epoxy Composite ◽

Mode I ◽

Mode I Fracture ◽

Mode I Fracture Toughness

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Mode I fracture toughness analysis of rubber particulate epoxy composite

Materials Today Proceedings ◽

10.1016/j.matpr.2019.10.111 ◽

2020 ◽

Vol 22 ◽

pp. 759-761

Author(s):

K.R. Chandan Reddy ◽

G. Bharathiraja ◽

V. Jayakumar

Keyword(s):

Fracture Toughness ◽

Epoxy Composite ◽

Mode I ◽

Mode I Fracture ◽

Mode I Fracture Toughness

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Investigating Nanoparticle Effect on the Mode I Fracture Toughness of Glass/Epoxy Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.47-50.1153 ◽

2008 ◽

Vol 47-50 ◽

pp. 1153-1156 ◽

Cited By ~ 1

Author(s):

Jia Lin Tsai ◽

Yi Lieh Cheng

Keyword(s):

Fracture Toughness ◽

Glass Fiber ◽

Silica Nanoparticles ◽

Sol Gel ◽

Silica Particles ◽

Epoxy Composites ◽

Mode I ◽

Mode I Fracture ◽

Mode I Fracture Toughness ◽

Unidirectional Glass

The research is aimed to investigate the influence of spherical nanoparticles on the fracture behavior of glass fiber/epoxy composites. Two different contents of silica nanoparticles, 10wt% and 20wt %, were introduced into the composite samples. Through a sol-gel technique, the silica particles with diameter of 25 nm were dispersed uniformly into the epoxy matrix. Subsequently, the silica epoxy mixtures were impregnated into the unidirectional glass fiber mat by means of a vacuum hand lay-up process to form the unidirectional glass fiber/epoxy laminate. During the fabrication, a porous film was inserted into the mid-plane of the laminate to generate the pre-crack. The Mode I fracture toughness of the composites with different nanoparticles contents were then determined form the double cantilever beam (DCB) specimens. Based on the experimental observations, it was found that the glass fiber/epoxy composites with silica nanoparticles exhibit superior fracture toughness than those that do not contain any silica particles. Scan Electronic Microscopy (SEM) observations on the failure surfaces indicated that the enhanced fracture toughness could be due to the improved interfacial bounding in conjunction with the nanoparticle debonding from the surrounding epoxy. In general, such failure mechanisms may complicate the fracture process, dissipating more fracture energy.

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