In order to avoid the instability of composite materials laminated tube connection between layer and layer, with green basalt fiber as raw material, through reasonable design, special-shaped 3D (three-dimensional) tubular woven fabrics two different thicknesses shapes were fabricated on a semi-automatic sample loom low cost. The composites by VARTM (vacuum assisted resin transfer molding) proce...

The damping in a carbon fiber reinforced plastic (CFRP) laminate is greater than that which occurs in most metallic materials. In the supercritical regime, the damping can trigger unstable whirl oscillations, which can have catastrophic effects. The vibrations occurring in a supercritical composite drive shaft are investigated here in order to predict instabilities of this kind. A simply suppor...

The main purpose of this study is an experimental investigation and comparison the mechanical properties pultruded glass fibre reinforced polymer composite based on polyester vinylester resin. For purpose, specimens were cut from walls square tube profile along to fibres direction. such as ultimate tensile strength bending strength, modulus flexural obtained. It was observed that using vinyl es...

Abstract Background Silicon carbide-fibre/silicon carbide matrix (SiC/SiC) composites are candidate materials for accident tolerant fuel cladding in light water and advanced gas cooled nuclear fission reactors. The mechanical damage behaviour of ceramic is sensitive to the composite geometry, microstructure loading state. Reliable test methods needed investigate subcritical that affects hermeti...

nowadays, tube bonding in vehicles structure is noticeably considered by many researches. in this paper, local tube compression process by a rubber ring has been studied. firstly, simulation of the process was performed by fem. then, experimental test has been carried out to validate the numerical results. numerical and experimental results were compared showing a good agreement. in the second ...

concrete filled steel tube columns (cfst) are a kind of composite columns according to advantages of cfst relative to reinforced concrete and steel columns. use of these materials is common in recent years especially in high building, unnecessary of molding, high ductility, proportionate resistance with low volume, economical, low deformation relative to steel columns are among advantages. in t...

objective: this study investigated the antibacterial properties of an ion-releasing resin composite (degufill), a hybrid resin composite (inten-s), a compomer (compoglass f) and a resin-modified glass ionomer (vitremer) against streptococcus mutans. materials and methods: the bacteria were derived from the dental plaque and cultured on blood agar plates. eppendorf tubes were filled by unset res...

introduction: the aim of this study was to assess shear bond strength of composite to dentin after air abrasion and laser treatment. methods: 40 human extracted molars divided into 4 groups (n=10) received the following treatments. group 1: carbide bur, group 2: air abrasion with aluminum oxide 50 μm, group 3: irradiated with erbium-doped yttrium aluminum garnet (er: yag) laser (150 mj/20hz), g...

The unsprung masses associated with the axles of a railway vehicle result in costly impact damage to rail infrastructure. A hybrid metallic-composite (HMC) axle is evaluated using finite element analysis. mass 74 kg, 63% lighter than an equivalent hollow steel axle. HMC comprises full length, carbon fibre reinforced, epoxy matrix composite tube secondary overwrapping for stiffness and EA1N grad...