A NUMERICAL RESEARCH ON SOLID PARTICLES PENETRATION THROUGH BUILDINGS ENVELOPE CRACKS

2009 ◽  
Author(s):  
Lelia Olea Popescu ◽  
Karim Limam ◽  
Iolanda Colda
Keyword(s):  
Solid Particles ◽  
Numerical Research

Calculation And Experimental Substantiation Of Optimal Design Of The Welded Joint Of Plates On Соver Plates

2020 ◽  
pp. 17-24
Keyword(s):  
Welded Joint ◽  
Experimental Studies ◽  
Engineering Calculation ◽  
Tensile Tests ◽  
Physical Nonlinearity ◽  
Steel Plates ◽  
Optimal Parameters ◽  
Actual Problem ◽  
Numerical Research ◽  
Cover Plates

The article is devoted to the actual problem of assigning optimal parameters for connecting steel plates on cover plates with angular welds that are widely used in construction practice. The article presents the results of a comprehensive study of operation of a welded assembly of the plates connection on cover plates. An algorithm is proposed for determining the optimal parameters of a welded joint with fillet welds on the cover plates, which makes it possible to obtain a strength balanced connection. The results of full-scale tensile tests of models were presented. These results confirmed the correctness of the assumed design assumptions, and made it possible to obtain a form of destruction, not characteristic and not described in the normative literature, expressed by cutting the main elements along the length of the overlap in the joint. The possibility of such a form of destruction was confirmed by the results of numerical research in a nonlinear formulation. The optimal parameters of the nodal welded joint determined by engineering calculation are confirmed by experimental studies, as well as by the results of numerical experiments on models of calculation schemes, taking into account the physical nonlinearity of the material operation. The obtained dependence for determining the bearing capacity of the joint by the cut-off mechanism and the expression for limiting the overlap length of the cover plates will make it possible to predict the nature of the fracture and design equally strong joints.

Abrasive wear of polymer/steel gear drives

2008 ◽  
Vol 4 (1) ◽  
pp. 1-26
Author(s):  
Gábor Kalácska
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Material Selection ◽  
Solid Particles ◽  
Soil Types ◽  
General View ◽  
Modern Engineering ◽  
Clean Environment ◽  
Engineering Polymers ◽  
Plastic Gears

Research was performed on the friction, wear and efficiency of plastic gears made of modern engineering polymers and their composites both in a clean environment (adhesive sliding surfaces) and in an environment contaminated with solid particles and dust (abrasive), with no lubrication at all. The purpose is to give a general view about the results of abrasive wear tests including seven soil types as abrasive media. At the first stage of the research silicious sand was applied between the meshing gears and the wear of plastic and steel gears was evaluated and analyzed from the point of different material properties (elongation at break, hardness, yield stress, modulus of elasticity) and its combinations. The different correlations between the experienced wear and material features are also introduced. At the second stage of the project the abrasive sand was replaced with different physical soil types. The abrasive wear of gears is plotted in the function of soil types. The results highlight on the considerable role of physical soil types on abrasive wear resistance and the conclusions contain the detailed wear resistance. The results offer a new tribology database for the operation and maintenance of agricultural machines with the opportunity of a better material selection according to the dominant soil type. This can finally result longer lifetime and higher reliability of wearing plastic/steel parts.

INVERSE PROBLEMS METHOD FOR STUDY OF HEAT TRANSFER IN SOLIDS INTERACTED WITH GAS FLOWS LOADED BY SOLID PARTICLES

Equipment ◽  
2006 ◽  
Author(s):  
Aleksey V. Nenarokomov ◽  
O. M. Alifanov ◽  
E. A. Artioukhine ◽  
I. V. Repin
Keyword(s):  
Heat Transfer ◽  
Inverse Problems ◽  
Solid Particles ◽  
Gas Flows

Flow and Heat Transfer Within Segregated Beds of Solid Particles

2001 ◽  
Vol 4 (3) ◽  
pp. 10 ◽  
Author(s):  
Abdulmajeed A. Mohamad ◽  
G. A. Karim
Keyword(s):  
Heat Transfer ◽  
Solid Particles ◽  
Flow And Heat Transfer

ESTIMATION OF THE EFFECT OF FREE-STREAM TURBULENCE AND SOLID PARTICLES ON THE LAMINAR-TURBULENT TRANSITION AT HYPERSONIC SPEEDS

2016 ◽  
Vol 47 (1) ◽  
pp. 15-28 ◽  
Author(s):  
Mikhail Aleksandrovich Pugach ◽  
Alexander Aleksandrovich Ryzhov ◽  
Alexander Vitalievich Fedorov
Keyword(s):  
Free Stream ◽  
Solid Particles ◽  
Free Stream Turbulence ◽  
Turbulent Transition ◽  
Hypersonic Speeds ◽  
Laminar Turbulent Transition

Dispersion modelling of solid particles from vehicle exhaust into the atmosphere

Ekologija ◽  
2008 ◽  
Vol 54 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Pranas Baltrėnas ◽  
Petras Vaitiekūnas ◽  
Saulius Vasarevičius ◽  
Saad Jordaneh
Keyword(s):  
Solid Particles ◽  
Dispersion Modelling ◽  
Vehicle Exhaust
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