In the present study, a new method for retrofitting reinforced concrete beam is introduced in which steel-concrete composite jackets containing steel fiber is used. For this purpose, 75% of the peripheral surface of reinforced concrete beams was initially reinforced using steel plates and bolts, and steel fiber reinforced concrete was used between the steel plates and the peripheral surfaces of...

Three-dimensional transient deformations of a laminate comprised of several unidirectional fiber reinforced layers perfectly bonded to each other and subjected to a blast load are analyzed by the finite element method with an in-house developed, verified and fully validated code with rate-dependent damage evolution equations for anisotropic bodies. The continuum damage mechanics approach employ...

A characterization of composite materials a polyester matrix reinforced with natural fibers Cuban henequen and organophilized bentonite was carried out, the experimental results which are used to formulate, implement, validate scalar damage model. The were added on weight basis 15, 20, 25% as reinforcing material, bentonite, in amounts 3, 5, 7% by weight, added. Samples containing only polymer ...

this study investigated the influence of nanoclay on the impact damage resistance of glass fiber-epoxy composites under high velocity ice impact loading. addition of 0.5 wt. % nanoclay into epoxy was shown to improve damage resistance compared to composite plates having no nanoclay platelet. the glass fiber-epoxy composites containing nanoclay brought about substantial improvement in ice impact...

Background. Acrylic resins used in restorative dentistry are the most popular denture base material, because they have good optical properties and small solubility in body fluids. However their mechanical properties are limited and therefore acrylic resins require different methods of reinforcement one of which can be application of different kinds of fibers. Objectives. To investigate the effe...

OBJECTIVE The objective of this study is to evaluate the fracture resistance of newer restorative materials that could serve as an alternate to crown coverage. MATERIALS AND METHODS Forty extracted human mandibular molar teeth were selected for this study and were divided into four groups (n = 10). All the teeth in the experimental groups (Group 2-4) were subjected to access cavity preparatio...

Recent industrial developments have focused more and on the applications of lightweight foamed concrete (LFC) in construction industry, having advantages over normal-strength concrete. LFC, however, has several drawbacks including brittleness, high porosity, excessive drying shrinkage, rapid cracking, low deformation resistance. Practical engineering typically chooses steel fiber or polymer to ...

The article states that the use of composite materials instead traditional allows you to significantly reduce weight product, while not changing strength characteristics this material. It was determined polymer based on metal powders, high-strength organic (aramid) and carbon fiber fillers with a matrix are promising for as structural materials. Fillers used improve operational properties mater...

Fiber reinforced polymer (FRP) has been used in the construction industry because of its advantages such as high strength, light weight, corrosion resistance, low density and elasticity. This paper presents a review bonding techniques adopted to strengthen timber beams using FRP achieve larger spans. Different methods between have summarized with focus on influencing factors their effects well ...