نتایج جستجو برای: fiber reinforced polymers

تعداد نتایج: 230147  

A Mandi, P Chandra Pal P Pati S Kundu

In this work, attempts are made to study the dispersion of Love waves in dry sandy layer sandwiched between fiber reinforced layer and inhomogeneous half space.Inhomogeneity in half space associated with density and rigidity and considered in exponential form. Displacement components for fiber reinforced layer, dry sandy layer and inhomogeneous half-space have been obtained by using method of s...

Journal: :civil engineering infrastructures journal 0
pantea rashid dadash m.sc. student, department of civil engineering, amirkabir university of technology, tehran, iran. ali akbar ramezanianpour professor, department of civil engineering, amirkabir university of technology, tehran, iran.

fiber reinforced concrete (frc) has been widely used due to its advantages over plain concrete such as high energy absorption, post cracking behaviour, flexural and impact strength and arresting shrinkage cracks. but there is a weak zone between fibers and paste in fiber reinforced concretes and this weak zone is full of porosity, especially in hybrid fiber reinforced concretes. so it is necess...

Journal: :Pollack Periodica 2021

Abstract Concrete indeterminate flexural members represented by continuous beams reinforced with both fiber-reinforced polymers and steel bars in a way that allows for moment redistribution at failure are analyzed. The efficiency of introducing the critical sections where plastic hinges likely to form is evaluated terms reliability. Monte Carlo simulation concept comparative reliability employe...

2000
James M. Kelly

An analysis is given for the mechanical characteristics of multilayer elastomeric isolation bearings where the reinforcing elements-normally steel plates-are replaced by a fiber reinforcement. The fiber-reinforced isolator, in contrast to the steel-reinforced isolator (which is assumed to be rigid both in extension and flexure), is assumed to be flexible in extension, but completely without fle...

Journal: :journal of dental research, dental clinics, dental prospects 0
farahnaz sharafeddin associate professor samira zare assistant professor zahra javanmardi postgraduate student

background and aims. bleaching may exert some negative effects on existing composite resin restorations. the aim of this study was to evaluate the effect of home bleaching on microleakage of fiber-reinforced and particle-filled composite resins. materials and methods. ninety class v cavities (1.5×2×3 mm) were prepared on the buccal surfaces of 90 bovine teeth. the teeth were randomly divided in...

Journal: :journal of dentistry, tehran university of medical sciences 0
masoomeh hasani tabatabaei associate professor, dental research center dentistry research institute and department of operative dentistry, faculty of dentistry, tehran university of medical sciences, tehran, iran. zahra hasani dentist, department of operative dentistry, shahrekord university of medical sciences, shahrekord, iran & dental research center dentistry research instituteof tehran university, tehran, iran. elham ahmadi assistant professor, department of operative dentistry, shahrekord university of medical sciences, shahrekord, iran & dental research center dentistry research instituteof tehran university, tehran, iran.

color match between fiber-reinforced composite (frc) restorations and teeth is an imperative factor in esthetic dentistry. the purpose of this study is to evaluate the influence of veneering composites and fibers on the color change of frc restorations.glass and polyethylene fibers were used to reinforce a direct microhybrid composite (z250, 3m espe) and a microfilled composite (gradia indirect...

Hooshang Dabbagh, Muhammad Abbassi

Fiber reinforced Polymers (FRP) have widely used for the purposes of enhances strength and ductility of concrete columns. Proper design of such hybrid columns, however, requires a better recognition of the behavior of concrete columns confined with FRP. In this paper, the influence of FRP thickness, concrete compressive strength, and column size on the performance of eccentrically loaded reacti...

2017
M. Mahesh

Conventional fiber reinforced plastics (FRP’s) have long been important if not indispensable in many crucial applications such as transportation, renewable energy, defense applications, as well as many others. Composite materials are of interest to these industries due to their attractive properties including high strength to weight ratio and high modulus to weight ratio. Comprehensive research...

Fiber reinforced concrete (FRC) has been widely used due to its advantages over plain concrete such as high energy absorption, post cracking behaviour, flexural and impact strength and arresting shrinkage cracks. But there is a weak zone between fibers and paste in fiber reinforced concretes and this weak zone is full of porosity, especially in hybrid fiber reinforced concretes. So it is necess...

Journal: :journal of rehabilitation in civil engineering 2014
muhammad abbassi hooshang dabbagh

fiber reinforced polymers (frp) have widely used for the purposes of enhances strength and ductility of concrete columns. proper design of such hybrid columns, however, requires a better recognition of the behavior of concrete columns confined with frp. in this paper, the influence of frp thickness, concrete compressive strength, and column size on the performance of eccentrically loaded reacti...

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