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Abstract
The main aim of this work is to examine interlaminar fracture toughness
improvement mechanisms of a composite material containing tough interlayer
modified with ceramic particles.
Various unsaturated polyester (UP) / silicon carbide particles (SiC) blends were
used for the interlayer-toughening of a UP/glass fiber composite to increase
delamination resistance of the material under mode I.
Two types of SiC powder ( F-360 [20 JJm] and F-1200 [2JJm] ) were mixed with the
liquid resin in different volume fractions:
(1) 4,6,10,12 and 16 % of F-360 (2) 1.75,3.25and 5.25 % of F-1200
The bending and mode I fracture toughness properties of the UP/SiC blends were
measured.
Mode I interlaminar fracture toughness of UP/glass fiber composite was found to
be moderately influenced by p~rticle content with two types of SiC particles .
Evidence of toughening mechanisms was found using scanning electron
microscopy (SEM).
Finally, theoretical equations were applied, using the experimental data ( load ,
displacement and crack length ), to compare experimental results with the results
obtained from theoretical equations .