The characteristics of composite materials Al 2 O 3 system - carbon nanotubes eutectic additives are investigated. influence the reinforcing component content, as well mode high-temperature heat treatment in vacuum on strength properties material considered. Samples with a mass content tubes 0.4% were obtained. These samples had following characteristics: an average tensile at three-point bendi...

in order to evaluate the effectiveness of the iranian made charcoal tubes in the field , 60 local made and 60 imported ones (skc type) were randomly selected and placed side by side for sampling aromatic hydrocarbons (including benzene, toluene, xylene) in workers breathing zone in a paint factory. the results indicated that there were no statistically significant differences between the mean c...

ultraviolet waves, because of their short wavelength, have a high energy and considerable damaging effects on surfaces. protection against ultraviolet radiations is one of the finishing treatments done on surfaces exposed to sunlight. the importance of this issue in relation to human health, due to complications such as skin burns and cancer, is doubled. up to now, different materials such as z...

The free vibration of the lattice cylindrical composite shell reinforced with Carbon Nano-tubes (CNTs) was studied in this study. The theoretical formulations are based on the First-order Shear Deformation Theory (FSDT) and then by enforcing the Galerkin method, natural frequencies are obtained. In order to estimate the material properties of the reinforced polymer with nano-tubes, the modified...

This investigation examines the possibility for nitrite chemical preservative to be delivered in meat cured products. Potassium was encapsulated delignified leaf celery and spinach placed on surface of meat. The delignification produces edible tubular cellulose (ETC) with 10 fold increased pore volume. encapsulation delivery using vegetable has been achieved both ETC ETC/Starch gel (SG) composi...

Abstract This paper investigates the use of z-pinning reinforcement in CFRP tubular structures under axial impact, to find optimum design increase specific energy absorption (SEA). Through-the-thickness is known as a technique improve integrity and fracture resistance composite materials structures. Manufacturing testing unpinned are conducted create base model validate numerical results. A fin...

The natural frequency of cantilevered bistable carbon/epoxy reeled composite (BRC) slit tubes constructed from combinations of braided and unidirectional (UD) plies is optimized with respect to fiber orientation angles and laminate stacking sequences. BRC tubes have the same geometry as a carpenter’s tape; however, they also have a second stable configuration in the coiled state, and it is cons...

Please cite this article in press as: Xiong J et al. M doi:10.1016/j.matdes.2010.08.016 A new type of lightweight sandwich panels consisting of vertically aligned hollow Al–Si alloy tubes as core construction and carbon fiber composite face sheets was designed. The hollow Al–Si alloy tubes were fabricated using precision casting and were bonded to the face sheets using an epoxy adhesive. The ou...

During their synthesis, multi-walled carbon nanotubes can be aligned and impregnated in a polymer matrix to form an electrically conductive and flexible nanocomposite with high backing density. The material exhibits the highest reported electrical conductivity of CNT-epoxy composites (350 S/m). Here, we show how conductive atomic force microscopy can be used to study the electrical transport me...

PURPOSE This study evaluated the depth of cure of resin composite cured by light through a translucent fiber post. MATERIALS AND METHODS The opaque plastic tubes in various lengths of 2, 4, 6, 8, 10, 12, 14 mm. were filled with resin composite in which two different translucent fiber posts were inserted into the center and photo-polymerized for 40 seconds. The degree of conversion of the cure...