STATEMENT OF PROBLEM Despite the favorable properties of conventional PMMA used as a denture base material, its fracture resistance could be improved. PURPOSE This in vitro study was performed to determine whether the flexural strength of a commercially available, heat-polymerized acrylic denture base material could be improved through reinforcement with 3 types of fibers. MATERIAL AND METH...

Environmental awareness and the need for sustainable construction inspired researchers practitioners to explore innovative alternatives that might reduce greenhouse gas emissions energy use related excessive structural work. One such alternative is utilization of Fiber-Reinforced Polymer (FRP) bars as a reinforcement in reinforced concrete members. FRP possess favorable characteristics like hig...

the purpose of this ex- vivo study was to evaluate the fracture resistance of simulated immature teeth, obturated with gutta-percha or resilon and reinforced by either composite resin or fiber post.eighty-four human maxillary incisors were divided into seven groups (n=12). teeth in all groups were prepared until peeso #5 (1.5mm) could be passed through the apex. root ends received 4mm of mta pl...

Optimizing the high-temperature energy storage characteristics of dielectrics is great significance for development pulsed power devices and control systems. Selecting a polymer with higher glass transition temperature (Tg) as matrix one effective ways to increase upper limit operating temperature. However, current high-Tg polymers have limitations, it difficult meet demand only polymer. For ex...

Fibre-reinforced polymer (FRP) matrix composites are widely used in large marine structures, and wind turbines where blade lengths now over 100 m. Composites the material of choice for small vessels due to ease manufacture, high hull girder stiffness, buckling resistance, corrosion resistance underwater shock resistance. Ships m still built using traditional steel and/or aluminium, but so far n...

BACKGROUND Posts are used to enhance crown buildup in pulpless teeth with destructed crown portion. Different types of post are used in endodontically treated teeth. The aim of the present in vitro study was to evaluate fracture resistance of custom made, metal, glass fiber reinforced and carbon reinforced posts in endodontically treated teeth. MATERIALS AND METHODS An in vitro study was carr...

The demand for polymer composite solutions in bipolar plates electrolyte membrane fuel cells (PEMFCs) has risen due to advantages over metal such as longer lifetime, weight reduction, corrosion resistance, flexible manufacturing, freedom of design, and cost-effectiveness. challenge with composites is achieving both sufficient electrical conductivity mechanical stability high filler content. A c...

Recently, short fiber reinforced composites are widely utilized in many structural parts in automobile, infrastructure and electric equipment applications due to their high specific strength, high specific stiffness, long fatigue life and high impact resistance as well as cost effective capability of production. If these parts are exposed to low-velocity impact, significant damages may develop ...

Aramid fibers and glass are widely used in dense-graded asphalt mixtures to improve the mechanical characteristics. However, their effect on characteristics of porous has not been explored. This study evaluated influence aramid fiber, pulp, glass-hybrid cellulose fiber abrasion resistance strength while maintaining functional The performance PA-16 incorporated with was using Cantabro test, perm...