Effect of interfacial ply orientation on the fracture toughness of a laminated graphite/epoxy composite

The delamination is one of the major modes of failure occurring in the laminated composite due to insufficient bonding between the layers. In this paper, the natural frequencies of delaminated S-glass and E-glass epoxy cantilever composite plates are presented by employing the finite element method (FEM) approach. The rotary inertia and transverse shear deformation are considered in the present study. The effect of parameters such as the location of delamination along the length, across the thickness, the percentage of delamination, and ply-orientation angle on first three natural frequencies of the cantilever plates are presented for S-glass and E-glass epoxy composites. The standard eigenvalue problem is solved to obtain the natural frequencies and corresponding mode shapes. First three mode shape of S-Glass and E-Glass epoxy laminated composites are portrayed corresponding to different ply angle of lamina.

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Evaluation of Interfacial Fracture Toughness and Interfacial Shear Strength of Typha Spp. Fiber/Polymer Composite by Double Shear Test Method

Materials ◽

10.3390/ma12142225 ◽

2019 ◽

Vol 12 (14) ◽

pp. 2225 ◽

Cited By ~ 7

Author(s):

Ikramullah ◽

Samsul Rizal ◽

Yoshikazu Nakai ◽

Daiki Shiozawa ◽

H.P.S. Abdul Khalil ◽

...

Keyword(s):

Fracture Toughness ◽

Shear Strength ◽

Interfacial Shear Strength ◽

Epoxy Composite ◽

Interfacial Fracture ◽

Interfacial Shear ◽

Composite Model ◽

Interfacial Fracture Toughness ◽

Double Shear ◽

The Matrix

The aim of this paper is to evaluate the Mode II interfacial fracture toughness and interfacial shear strength of Typha spp. fiber/PLLA and Typha spp. fiber/epoxy composite by using a double shear stress method with 3 fibers model composite. The surface condition of the fiber and crack propagation at the interface between the fiber and the matrix are observed by scanning electron microscope (SEM). Alkali treatment on Typha spp. fiber can make the fiber surface coarser, thus increasing the value of interfacial fracture toughness and interfacial shear strength. Typha spp. fiber/epoxy has a higher interfacial fracture value than that of Typha spp. fiber/PLLA. Interfacial fracture toughness on Typha spp. fiber/PLLA and Typha spp. fiber/epoxy composite model specimens were influenced by the matrix length, fiber spacing, fiber diameter and bonding area. Furthermore, the interfacial fracture toughness and the interfacial fracture shear stress of the composite model increased with the increasing duration of the surface treatment.

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Experimental investigation of fracture toughness for treated sisal epoxy composite

AIMS Materials Science ◽

10.3934/matersci.2018.1.93 ◽

2018 ◽

Vol 5 (1) ◽

pp. 93-104

Author(s):

Araya Abera Betelie ◽

◽

Yonas Tsegaye Megera ◽

Daniel Telahun Redda ◽

Antony Sinclair

Keyword(s):

Fracture Toughness ◽

Experimental Investigation ◽

Epoxy Composite

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Glass fiber-reinforced epoxy composite with surface-modified graphene oxide: enhancement of interlaminar fracture toughness and thermo-mechanical performance

Polymer Bulletin ◽

10.1007/s00289-018-2387-x ◽

2018 ◽

Vol 76 (1) ◽

pp. 259-270 ◽

Cited By ~ 9

Author(s):

Alireza Ashori ◽

Mehdi Ghiyasi ◽

Akram Fallah

Keyword(s):

Fracture Toughness ◽

Graphene Oxide ◽

Glass Fiber ◽

Mechanical Performance ◽

Epoxy Composite ◽

Interlaminar Fracture Toughness ◽

Glass Fiber Reinforced ◽

Modified Graphene Oxide ◽

Surface Modified ◽

Modified Graphene

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Fracture Toughness and Rheology of Alumina-Filled Epoxy Composite

ACS Symposium Series - Polymer Durability and Radiation Effects ◽

10.1021/bk-2007-0978.ch027 ◽

2007 ◽

pp. 328-338 ◽

Cited By ~ 1

Author(s):

Laura M. McGrath ◽

Joseph L. Lenhart ◽

Richard S. Parnas ◽

Saskia H. King

Keyword(s):

Fracture Toughness ◽

Epoxy Composite

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The Effects of Water and Seawater on the Mechanical Properties of Carbon Fibre Reinforced Epoxy Composite under Pre-Cure Curing Condition

Advanced Composites Letters ◽

10.1177/096369359800700404 ◽

1998 ◽

Vol 7 (4) ◽

pp. 096369359800700

Author(s):

M. Zhang ◽

S.E. Mason

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Tensile Strength ◽

Carbon Fibre ◽

Laminate Composite ◽

Mechanical Performance ◽

Epoxy Composite ◽

Interlaminar Fracture Toughness ◽

Curing Condition ◽

Structural Carbon

The influences on the interlaminar fracture toughness (GIC) and ultimate tensile strength (UTS) of a cured structural carbon fibre reinforced epoxy composite of two contaminants, water and seawater, introduced prior to cure have been investigated. The results have demonstrated that the control of environmental factors such as water and seawater can have significant effects on the mechanical performance of laminate composite components during the manufacturing process.

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The Interlaminar Toughening Effect of Hybrid PES/E51 Films on Carbon Fiber/ Epoxy Composite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.984.131 ◽

2020 ◽

Vol 984 ◽

pp. 131-136

Author(s):

Chao Cheng ◽

Hui Zhang ◽

Ze Yu Sun ◽

Yong Liu ◽

Mu Huo Yu

Keyword(s):

Fracture Toughness ◽

Composite Laminates ◽

Phase Inversion ◽

Hybrid Film ◽

Epoxy Composite ◽

Interlaminar Fracture Toughness ◽

Resin Infusion ◽

Mode I Fracture Toughness ◽

Carbon Fiber Epoxy ◽

Opposite Tendency

In this study, E51 was appended as an additive to the PES casting solution and hybrid PES/E51 films with different E51 content were produced by phase inversion approach, applied as interleaves to improve the interlaminar fracture toughness of CF/EP composite laminates prepared by vacuum assistant resin infusion process (VARI). The time that the hybrid film dissloved into the epoxy resin depended on the content of E51 in the film, moreover, it was observed that Mode I fracture toughness of the hybrid film modified composite reduced with the addition of E51 compared with the pure PES film interleaved composite, however, the tensile properties showed the opposite tendency. The reason was the reduction in the thickness of the interlayer resin illustrated by cross-section morphologies of all types of laminates.

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