The propagation of torsional waves in a prestressed fiber-reinforced half-space under the effect of magnetic field and gravity has been discussed. The problem has been solved analytically using Whittaker function to obtain the exact solution frequency equations. Numerical results for stress, gravity and magnetic field are given and illustrated graphically. Comparisons are made with the results ...

Reconstruction of buildings and structures is becoming one the main directions in field construction, design production works during reconstruction are significantly different from ones new structures. After carrying out a number studies on inspection technical condition order to determine effect defects bearing capacity, criteria for assessing state floor slab were identified. Conclusions furt...

Combining different fiber types may improve the mechanical properties of reinforced concrete. The present study is focused on investigating hybrid concrete (HFRC) with steel and basalt fiber. Mechanical fine-grained are investigated. results demonstrate that using optimal reinforcement ratios avoids mixtures’ segregation improves their homogeneity. Concrete has higher strength. Effective method...

Asphalt concrete pavements are vulnerable to freeze-thaw cycles. Consecutive cracking and penetration of corrosive agents can expedite the degradation asphalt result in weight loss reduced strength. Fiber reinforcement flexible bituminous bridge cracks limits crack width enhances toughness composite. Furthermore, steel fibers facilitate heating during maintenance repair operations. Electrical r...

The influence of the fiber used as reinforcement in resin matrix composite materials submitted to repeated low energy impacts is analyzed. The aramid, glass and carbon fiber composites were submitted to drop weight tests from 0.5m and from 1m. The number of impact events necessary to cause failure was recorded, and the fracture characteristics of each composite were analyzed by optical microsco...

Natural Fibers composites are considered to have potential use as reinforcing material in polymer matrix composites because of their good strength, stiffness, low cost, environmental friendly and biodegradable. In present study, mechanical properties for natural fiber composites were evaluated. Here, areca fiber is used as new natural fiber reinforcement and epoxy resin as matrix. The extracted...

Fiber reinforced composites (FRCs) are more and more widely applied in dentistry to substitute for metallic restorations: periodontal splints, fixed partial dentures, endodontic posts, orthodontic appliances, and some other indirect restorations. In general in FRCs, the fiber reinforcement provides the composite structure with better biomechanical performance due to their superior properties in...

Glass fiber-reinforced polymer (GFRP) concrete reinforcement exhibits high strength, is lightweight, can decrease time of construction, and is corrosion resistant. However, research has shown that chemical reactions deteriorate the GFRP reinforcing bars over time, resulting in a reduced tensile capacity. This paper develops a time-variant probabilistic model to predict the tensile capacity of G...