An experimental study was undertaken to the tube-side evaporation heat transfer characteristics of enhanced tubes and compare their performance with that smooth tubes. These experiments were conducted in order determine how R410a evaporates inside tubes; for a saturation temperature 279.15 K; mass flux values ranged from 50 250 kg/(m2·s); an inlet quality 0.2 outlet 0.8. Enhanced evaluated incl...

Piles used in bridges, structures and marine environments are typically produced using concrete, steel, and timber. High repair and replacement costs of these piles have led North American highway agencies and port authorities to investigate the feasibility of using durable materials such as fiber-reinforced polymers (FRP) in pile applications. This paper presents a new generation of composite ...

Currently, FRP composite tubes are drawing increasing attention in many industrial applications, due to their excellent mechanical and lightweight properties, with reduced energy consumption enhanced sustainability. This study investigates the failure mechanisms crashworthiness performance of glass carbon fibre reinforced polymer (GFRP CFRP) under low velocity transverse impact. Finite element ...

Objectives. The objective of this in vitro study was to investigate whether weight gain or loss in the three different composites occurs due to water absorption when they are stored in water. Methods. The composite restorative materials selected for this study included a microfine hybrid (Synergy) and two nanofilled composite restorative materials (Ceram X and Filtek Supreme Ultra). Twenty spec...

and findings of laboratory and field tests of a new generation of precast composite piles used for the first time in the construction of the Route 40 highway bridge over the Nottoway River in Virginia. The piles consisted of 24.6 in. (625 mm) diameter concrete-filled glass fiber reinforced polymer (GFRP) circular tubes, with a 0.21 in. (5.3 mm) wall thickness. The composite piles extended above...