Effect of Fibre-Matrix Adhesion on Mechanical Properties of Composites

1990 ◽  
pp. 505-520 ◽  
Author(s):  
W. Gutowski
Keyword(s):  
Mechanical Properties ◽  
Matrix Adhesion ◽  
Fibre Matrix ◽  
Properties Of Composites

scholarly journals Unidirectional Cordenka Fibre-Reinforced Furan Resin Full Biocomposite: Properties and Influence of High Fibre Mass Fraction

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Talent Malaba ◽  
Jiajun Wang
Keyword(s):  
Mechanical Properties ◽  
Mass Fraction ◽  
Shear Fracture ◽  
Tensile Fracture ◽  
Initial Increase ◽  
Subsequent Increase ◽  
Matrix Adhesion ◽  
Furan Resin ◽  
High Fibre ◽  
Fibre Matrix

A full biocomposite was fabricated from Cordenka CR fibre and furan resin. High fibre mass fractions (FMF) were achieved by pressing the CR fibres into unidirectional sheets prior to incorporation into the resin. Results of testing indicated that the tensile properties of the biocomposite were improved by the initial increase of FMF from 51 to 64%, with a subsequent increase of FMF to 75% resulting in a deterioration of those properties. Examination of the tensile fracture surfaces with a scanning electron microscope (SEM) revealed moderate deterioration in fibre-matrix adhesion after the initial increase of FMF. Further increase of the FMF to 75% was shown by SEM to result in worse fibre-matrix adhesion. On the other hand, the flexural, interlaminar-shear, and dynamic mechanical properties were adversely affected by the increase in fibre-mass fraction from 51 through 75%. These effects were mainly attributed to reduced fibre wetting that resulted in weakened fibre-matrix interfacial bonding and subsequent poor stress exchange at the fibre-matrix interface. Observations made with a digital microscope revealed normal crack behaviour in the laminated composite, and the shear fracture modes were I and II. This biocomposite has mechanical properties comparable to those of flax and glass fibre-reinforced furan resin biocomposites.

Mechanical Properties of Sisal Reinforced Composites in Response to Water Absorption

2002 ◽  
Vol 10 (6) ◽  
pp. 407-426 ◽  
Author(s):  
Min Zhi Rong ◽  
Ming Qiu Zhang ◽  
Yuan Liu ◽  
Zhi Wei Zhang ◽  
Gui Cheng Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Natural Fibre ◽  
Practical Applications ◽  
Fibre Composites ◽  
Response To Water ◽  
Fibre Modification ◽  
Fibre Matrix ◽  
Agent Treatment ◽  
Properties Of Composites

The authors discuss the water absorption behaviour of sisal and its epoxy based composites and the mechanical properties of composites that have been aged in water. In addition, a series of fibre pretreatment techniques, including mercerization, acetylation, cyanoethylation, coupling agent treatment and thermal treatment, which are believed to be able to improve the water resistance of sisal and its composites, have been evaluated. It was found that the water absorption behaviour of sisal composites is controlled mainly by the fibre and the fibre/matrix interfacial characteristics. As a result, appropriate fibre modification to retard water diffusion and enhance interfacial adhesion is necessary if the natural fibre composites are to be used in practical applications.

Hydrothermal Ageing of GF/PP Composites: When Glass/Polymer Adhesion Favours Water Entrapment

2005 ◽  
Vol 13 (1) ◽  
pp. 27-35 ◽  
Author(s):  
D. Larivière ◽  
P. Krawczak ◽  
C. Tibéri ◽  
P. Lucas
Keyword(s):  
Mechanical Properties ◽  
Fibre Strength ◽  
Fibre Reinforcement ◽  
Long Term Effects ◽  
Matrix Adhesion ◽  
Transverse Tensile ◽  
Tension Properties ◽  
The Matrix ◽  
Pp Composites ◽  
Fibre Matrix

This study aims to assess the effects of ageing in boiling water on the transverse tensile mechanical properties of unidirectional commingled GF/PP composites, as well as the influence of the fibre/matrix adhesion on the water absorption and desorption mechanisms. For this purpose, different interfacial qualities were obtained by a modification of the fibre reinforcement sizing (polypropylene specific sizing, or no sizing), and of the matrix (with or without coupling agent). A very good retention of the mechanical properties was observed for those composites which had been treated so as to improve the fibre/matrix adhesion. It is also shown that the better the adhesion, the longer the water remained inside the composite material. This induced effect appears to be the counterpart of the protecting role against moisture of a strong interface. The interfacial interactions act as barriers both during absorption and during desorption. This leads to water molecule entrapment. Hence, the persistence of water trapped at the interfaces in the case of sized glass fibres composites leads us to recommend investigations on the long term effects on longitudinal tension properties, since the effects of zero-stress ageing are known to reduce fibre strength.

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