The role of shear deformation in the fatigue failure of a glass fibre-reinforced composite

doi:10.1016/0010-4361(77)90109-4

Composites

Volume 8, Issue 4, October 1977, Pages 237-243

https://doi.org/10.1016/0010-4361(77)90109-4 Get rights and content

Abstract

Uniaxial and in-plane shear fatigue tests on a woven roving glass fibre composite show that the stress/strain behaviour and modes of damage depend on the components of normal stress and in-plane shear stress acting on the fibre plane. Three distinct damage modes are discernible and it is the fibre angle rather than the applied stress state which dictates the occurence, extent and interaction of each mode.

References (20)

M.W. Parsons et al.
Observations of surface deformation, crack initiation and crack growth in low-cycle fatigue under biaxial stress
Mater Sci and Engng
(1976)
P.J.E. Forsyth
A two-stage process of fatigue crack growth
S. Iida et al.
Crack propagation rate in 7075-T6 plates under cyclic tensile and transverse shear loadings
J Basic Engng
(1969)
G.R. Halford et al.
Low-cycle fatigue in torsion
C.D. Hopper et al.
Fatigue crack propagation in biaxial stress fields
J Strain Analysis
(1977)
‘Strength and stiffness through fibre orientation’, Reinforced plastics design guide, (3M...
G.R. Sendeckyj
Mechanics of composite materials
L.J. Broutman et al.
Modern Composite Materials
(1967)
T.R. Smith et al.
The progressive nature of fatigue damage in glass reinforced plastics
L.J. Broutman
Failure mechanisms in glass reinforced plastics subjected to static compression, creep and fatigue

There are more references available in the full text version of this article.

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^☆: This paper was presented at the SEE Fatigue Group conference on ‘Fatigue of frp’ held on 29 June 1977 at City University, London.

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The role of shear deformation in the fatigue failure of a glass fibre-reinforced composite☆

Abstract

Mater Sci and Engng

A two-stage process of fatigue crack growth

Crack propagation rate in 7075-T6 plates under cyclic tensile and transverse shear loadings

J Basic Engng

Low-cycle fatigue in torsion

Fatigue crack propagation in biaxial stress fields

J Strain Analysis

Mechanics of composite materials

Modern Composite Materials

The progressive nature of fatigue damage in glass reinforced plastics

Failure mechanisms in glass reinforced plastics subjected to static compression, creep and fatigue