scholarly journals Interlaminar Shear Strength of Carbon Fibre Reinforced Epoxy Composite under the Influence of Environments

1998 ◽  
Vol 7 (1) ◽  
pp. 096369359800700
Author(s):  
M. Zhang ◽  
S.E. Mason
Keyword(s):  
Shear Strength ◽  
Carbon Fibre ◽  
Laminate Composite ◽  
Mechanical Performance ◽  
Epoxy Composite ◽  
Interlaminar Shear Strength ◽  
Curing Conditions ◽  
Interlaminar Shear ◽  
Structural Carbon ◽  
Careful Comparison

The influences of contamination, using a range of contaminants introduced under postcure and pre-cure curing conditions, on the interlaminar shear strength (ILSS) of a cured structural carbon fibre reinforced epoxy composite have been investigated. A careful comparison between the post-cure and pre-cure conditions subjected to the different type of contaminants (water, seawater, acid, alkali and organic) confirmed a definite reduction in the ILSS properties. The results demonstrate that the control of environmental factors such as water, acids, alkalis, salts and organic solvents can have significant effects on the mechanical performance of laminate composite components during the manufacturing process and usage.

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

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.

Experimental study on the effect of stitch arrangement on mechanical performance of GFRP laminates manufactured on a basis of stitched preforms

2011 ◽  
Vol 46 (9) ◽  
pp. 1067-1078 ◽  
Author(s):  
Mateusz Koziol
Keyword(s):  
Shear Strength ◽  
Composite Laminates ◽  
Mechanical Performance ◽  
Flexural Modulus ◽  
Interlaminar Shear Strength ◽  
Direction Parallel ◽  
Stitch Density ◽  
Stitch Length ◽  
Interlaminar Shear ◽  
Flexural Tests

This article presents the results of interlaminar shear and flexural tests of stitched polyester glass fiber laminates in dependence on stitch density and main geometric stitching parameters: stitch length and stitch spacing. Purpose of the study is to work out guidelines and indications for manufacturers of composite laminates who use or who plan to use stitching technique. It was found that stitching significantly improves interlaminar shear strength which increases with stitch density. However, stitching causes deterioration of in-plane flexural properties – the deterioration progresses when stitch density increases. Obtained results indicate that it is better to achieve increase in stitch density (resulting in improvement of interlaminar shear strength) by reduction of stitch length than by reduction of stitch spacing. Stitched laminate shows higher flexural strength and flexural modulus when bent into direction parallel to the stitch lines than when bent into the transverse direction. The results obtained within the study and their approximation constants may be a base for a new theoretical model simulating behavior of stitched laminate during static bending and enabling prediction of its mechanical performance.

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