Experimental study of behavior of filament winding composite pipes with liner using glass fibers and silica nanoparticles under impact loading

Due to the extensive use of composite materials in various industries, recognizing the failure models of these materials is very important. In this article, the behavior and failure models of composite pipes made by filament-wound with fiberglass, with internal liner and silica nanoparticles under local impact tested and examined. Filament winding is performed using a semi-automatic filament-wound device. Nano particles of silica that are used in the manufacturing the samples during the process of mixing and for better homogenization, the ultrasound is used. The filament winding angle of all 16 tubes was ±55. Impact test, using a gas gun with speeds of 118, 113, 108 and 100 meters per second is done. Add silica nanoparticles increases the elastic modulus and strength of the matrix. However, the existence of brittle liner, the composite shell behavior puts under its effect. In all tests, penetration of the projectile into the tube were occurred. The failure area due to impact, were same to the diameter of the projectile. Rupture of fibers failures in the matrix is the most important models of failure that were observed in impacted composite tubes. The experimental observation were reported, discussed and commented upon.