BACKGROUND AND AIMS The mechanical properties of fiber-reinforced composite fixed partial dentures (FPDs) are af-fected by fiber impregnation. The aim of this in vitro study was to compare the fracture resistance of composite fixed partialdentures reinforced with pre-impregnated and non-impregnated fibers. MATERIALS AND METHODS Groups (n=5) of three-unit fiber-reinforced composite FPDs (23 mm...

one important application of fiber reinforced polymer (frp) is to confine concrete as frp jackets in seismic retrofit process of reinforced concrete structures. confinement can improve concrete properties such as compressive strength and ultimate axial strain. for the safe and economic design of frp jackets, the stress-strain behavior of frp-confined concrete under monotonic and cyclic compress...

Glass fiber trapezoidal corrugated sandwich structures are composed of cores and glass fiber-reinforced polymer (GFRP) panels. A series low-velocity impact tests were conducted to investigate the resistance performance, considering effects position, impactor shape, diameter on damage mechanism structures. When shape energy remain constant, maximum load at node point is higher than base, while d...

Impact simulations for damage resistance analysis are computationally intensive due to contact algorithms and advanced models. Both methods, which the main ingredients in an impact event, require refined meshes at zone obtain accurate predictions of force onset propagation through material. This work presents application partial Dirichlet–Neumann algorithm simulate low-velocity problems on comp...

In the present study, modelling and vibration analysis of Carbon nanotubes/ fiber/ polymer composite microplates are investigated. The governing equations of the Carbon nanotubes/ fiber/ polymer composite microplates are derived based on first order shear deformation plate theory, rather than other plate theories, due to accuracy and simplicity of polynomial functions. The modified couple stres...

Poly(methyl methacrylate) (PMMA) bone cements have a long and successful history of use for implant fixation, but suffer from a relatively low fracture and fatigue resistance which can result in failure of the cement and the implant. Fiber or particulate reinforcement has been used to improve mechanical properties, but typically at the expense of the pre-cured cement viscosity, which is critica...

Composite materials are finding increasing application in mechanical systems because of their desirable physical characteristics compared with metals; for example, high strengthand stiffness-to-weight ratios, and the potential for constructing complex shapes without joints or extensive machining. In addition, the dynamic behaviour of composite structures can be manipulated by judicious selectio...

Introduction: Post and core has been considered for endodontically treated tooth, especially in cases with severe damage crowns. Recently fiber reinforced composite posts (FRC post) have been used in the treatment of endodontically treated teeth. Because the length and diameter of posts are effective in stress distribution, the purpose of this study is to evaluate the effect of length and diame...

Deployable space structures are being built from thin-walled fiber-reinforced polymer composite materials due to their high specific strength, stiffness, and designed bistability. However, the inherent viscoelastic behavior of resin matrix can cause dimensional instability when is stored under strain. The extended time stowage between assembly deployment in result performance degradation worst ...