statement of problem: microleakage is one of the most important problems in composite restorations. one way to reduce the microleakage is decreasing the total amount of resin by insertion of fibers in composite restorations. objectives: this study aimed to compare the microleakage of silorane and methacrylate-based composites (a nanohybrid) in class ii restorations with gingival margins on the ...

Abstract Graphene is extensively used as a functional material due to its superb heat transfer and electrical conductivity properties. In this paper, sample graphene oxide /glass fiber/epoxy resin composites were prepared by ultrasonic decentralization. The stress distribution of the graphene-doped fiber-reinforced matrix simulated mathematical modelling. reliability numerical model illustrated...

A compression strength model based on damage mechanics and a Gaussian distribution of fiber misalignment is presented. The model uses only three material parameters that can be measured by well established methodologies. The compression strength and all the parameters that enter in the model were measured for the same materials. Predicted values are compared to experimental data for eleven diff...

Abstract The performance/weight ratio of fiber reinforced polymer matrix composites makes them the material choice for structural applications in many fields such as aerospace, aeronautics, automotive and civil engineering...etc. In composites, fibers used reinforcement are mainly synthetic carbon and/or glass fibers. To ensure low cost using fiber-reinforced materials motor vehicles, it is pro...

In tribological applications, because of the corrosive problems of the metals in water applications, poly-ether-ether-ketone (PEEK) and its composites are preferred for rubbing materials. As it is known PEEK is a high performance semi-crystalline thermoplastic polymer and has received significant attention in recent years. This is due to its high mechanical strength and elastic modulus, high to...

In the current scenario, natural fiber reinforced polymer nanocomposites are widely used in the areas of aerospace, automobile, sports and military sectors due to its multi-functional features like high specific strength, high corrosion resistance, flame resistance, improved mechanical properties and low cost when compared with artificial fiber reinforced composites. These polymer based nanocom...