in this paper, first design and analysis history of full metal cng cylinders for vehicle are investigated. next with respect to the cng worldwide standards, a full metal type cylinder is designed and analysed. then the numerical analysis results and practical results are compared, and the correctness of the investigation is verified. in the end, the most suitable alloy with respect to the dimen...

A triblock terpolymer, polystyrene-block-polybutadiene-block-poly(methyl methacrylate) (SBM), formed a double-helical nanoscale structure, composed of polybutadiene (PB) helical microdomains around hexagonally packed polystyrene (PS) cores in a poly(methyl methacrylate) matrix. The orientation of double-helical morphologies at various film thicknesses were studied using transmission electron mi...

The different thermo-elastic properties of glass fibers and polymer matrices can generate residual thermal stresses in injection-molded fiber-reinforced plastic (FRP) objects. During cooling from mold to room temperature, these be relaxed by large deformations resulting an instability the unwarped configuration (i.e., buckling). This article investigates buckling thin FRP disks via analytical f...

6 In this paper, theoretical study is carried out to investigate the general 3D short-crested 7 wave interaction with a concentric two-cylinder system. The interior cylinder is imperme8 able and the exterior cylinder is thin in thickness and porous to protect the interior cylinder. 9 Both cylinders are surface-piercing and bottom mounted. Analytical solution is derived 10 based on the linear po...

Abstract In this research work, the finite element software, ABAQUS is used to study by simulations influence of form defect on mechanical behavior a shrink-fitted assembly presenting internal radial cracks. Under action contact pressure induced tightening between two cylinders, these cracks resulting from incorrect operations or materials elaboration defect, can be harmful assembly. Various we...

Abstract Defined surface micrcotextures offer potential for the friction reduction in elastohydrodynamic contacts and can thus increase energy efficiency of technical systems. The production prostheses, where microtextured surfaces provide anti-bacterial effects is another application area. To manufacture these components economically large quantities, forming processes are to be aimed at. Sinc...

Flow over arrays of cylinders different cross-sections has been an essential area research interest for a long time. For the estimation flow characteristics around cylinders, numerical simulation past four elliptic in square arrangement range spacing ratios is analysed this paper. Three considered present study are 3.45, 4.14 and 5.17. The results from compared with experimental findings obtain...

Bubble column reactors suffer from bubble coalescence resulting in a decreased mass transfer efficiency. In order to increase the mass transfer rate in bubble column reactors, a novel reactor is proposed, the Micro-Structured Bubble Column (MSBC). is novel reactor makes use of a wire-mesh serving the purpose of cuing bubbles into smaller bubbles. is increases the specific bubble surface area...