The research carried out by the authors of this paper is focused on technological process Inconel 625 welding with MAG–CMT (Metal Active Gas-Cold Metal Transfer) method. was welded to substrate material, which 16Mo3 steel. Both materials are used produce so-called bimetallic tubes, in practice serve as a part equipment intended for waste incineration. For reason, tubes must withstand extreme co...

Kevlar is a type of aramid fibers which is characterized by high strength to low weight ratio. This material is widely used in bulletproof vests and helmets, in which it creates a barrier to projectiles to protect specific objectives, laminated tubes and pressure vessels, etc. In this study the ballistic behavior of Kevlar /epoxy composite and Kevlar fabric is investigated. The results showed t...

In this paper the energy absorption capacity of stiffened circular composite tube is considered. The governing equations and dynamic equilibrium are first derived and then solved. Additionally, a finite element model of reinforced circular composite tube structure is modeled. At the following, the effects of various parameters such as structural geometry, number of rings and stingers on mechani...

The condensation heat transfer characteristics and corrosion resistance of copper, Ni-P-Cu, polytetrafluoroethylene (PTFE), Ni-P, Ni coated tube surfaces were investigated. results indicate that coefficient PTFE, tubes grows by 36.8%, 29.3%, 19.6%, 7.5% than copper tubes, respectively. phase structure Ni, PTFE is mixed crystal structure(nanocrystals-based), (amorphous-based), amorphous structur...

The purpose of this study was to determine the impact of different enamel preparation procedures and compare light cure composite (LCC) and resin-modified glass ionomer (RMGI) on the bond strength of orthodontic metal tubes rebonded to the enamel. Twenty human molars were divided into two groups (n = 10). Tubes were bonded using LCC (Transbond XT) in group 1 and RMGI (Fuji Ortho LC) in group 2....

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...