@Article{, title={Some Mechanical Properties of Polymer Matrix Composites Reinforced by Nano Silica Particles and Glass Fibers}, author={Reem A. Mohammed and Jawad K. Oleiwi and Sudad I. Younis}, journal={Engineering and Technology Journal مجلة الهندسة والتكنولوجيا}, volume={36}, number={12 Part (A) Engineering}, pages={1283-1289}, year={2018}, abstract={This research studied the effect of nano silica particles on wearbehavior test , ultimate tensile strength ,impact strength, fracture toughness andhardness shore D of specimens composite material. The hand-lay-up method isused to preparation of specimens established from unsaturated polyester resinmatrix reinforcement with 4% weight fraction glass fiber (chopped / woven) matand 1%, 3%, 5% weight fraction of nano silica particle. The nano silicaparticles used in this study has an average size of (less than 45nm). The resultsshowed that the specimen (up+4% woven glass fiber+5% nano SiO2) givesbetter mechanical properties include ultimate tensile strength, impact strength,fracture toughness and hardness shore D (110 MPa, 13.7 K.J/m2, 18.92MPa.m1/2, 85 shore D) respectively,when compare other specimens. The wearrate decreased from (22.5×10-4cm3/N.m) for specimen (pure unsaturatedpolyester resin) to (0.18×10-4cm3/N.m) for specimen (UP+4% woven glass fiber+5% nano SiO2) under parameter 7N (load), 15 minutes (sliding time), 2m/s(sliding speed) and (7 cm) sliding distance.

} }