Determination of tangential stresses in magnetoabrasive treatment

1992 ◽  
Vol 31 (12) ◽  
pp. 1030-1032
Author(s):  
V. Ya. Shlyuko ◽  
N. L. Taranenko ◽  
V. S. Maiboroda ◽  
V. Ya. Vermenko ◽  
O. V. Stepanov
Keyword(s):  
Tangential Stresses

A Rapid Method for the Determination of Principal Stresses Across Sections of Symmetry From Photoelastic Data

1938 ◽  
Vol 5 (1) ◽  
pp. A24-A28
Author(s):  
M. M. Frocht
Keyword(s):  
Free Boundary ◽  
Rapid Method ◽  
Circular Hole ◽  
Characteristic Curve ◽  
Principal Stresses ◽  
Recent Improvement ◽  
Tangential Stresses ◽  
Circular Holes ◽  
Photoelastic Data

Abstract The author discusses: (a) Mesnager’s theorem of isoclinics, (b) the characteristic curve of tangential stresses across a section of symmetry, (c) a formula for the maximum tangential stresses for the case of a central circular hole between fields of pure tension, (d) the slope of the p curve at a point corresponding to a cupic point, (e) recent improvement in the determination of free boundary stresses, and (f) formulas for the position of cupic points for two cases. A new method for the determination of the principal stresses across sections of symmetry from photoelastic data is illustrated with three examples: (1) Bars in tension or compression with central circular holes, (2) grooved beams in bending, and (3) rings or disks with circular central holes subjected to two concentrated diametral loads.

scholarly journals THEORETICAL SOLUTION TO THE PROBLEM OF THE PROPAGATION OF STRESSES IN SOILS WHEN EXPOSED TO AXISYMMETRIC RADIAL EFFECTIVE STRESSES

2019 ◽  
Vol 10 (2) ◽  
pp. 51-58
Author(s):  
A. Z Khasanov ◽  
Z. A Khasanov ◽  
N. A Nabieva ◽  
J. A Khasanov
Keyword(s):  
Axisymmetric Problem ◽  
Soil Mass ◽  
Theoretical Studies ◽  
Effective Pressure ◽  
Tangential Stresses ◽  
Mathematical Expressions ◽  
Compression Region ◽  
Theory Equation ◽  
Space Conditions

The article discusses issues related to the determination of radial and tangential stresses in the well in the presence of gravitational pressure of the soil mass. The basis is the well-known theoretical solutions of the axisymmetric problem of a thick-walled pipe, namely, the Lame solution. The action of two pressures is considered: the internal pressure р 1 and the external р 2, uniformly distributed over the inner and outer surfaces of the hollow cylinder. As a result of theoretical studies, it was found that the use of the elasticity theory equation to determine radial and tangential stresses in a well with an internal effective pressure s r = р 1, leads to its slow horizontal decrease, which is not observed in practice. The authors proposed solutions that make it possible to obtain closer values of s r for soils. It was also experimentally proved that the value of the active compression region for soil wells with internal effective pressure р 1 is almost two times higher than the value obtained for stamp tests in half-space conditions. The authors obtained mathematical expressions of the strength and stability of wells from gravitational loads of soil.

Stresses in anvil — strip system during production of copper sheets in continuous casting and deformation installation

2020 ◽  
pp. 508-511
Author(s):  
O.S. Lekhov ◽  
D.Kh. Bilalov
Keyword(s):  
Continuous Casting ◽  
Cyclic Deformation ◽  
Deformation Zone ◽  
Deformation Process ◽  
Loading Pattern ◽  
Tangential Stresses ◽  
Nite Element ◽  
Calculation Results ◽  
Deformation Processes

The prospects for development of combined continuous casting and deformation processes in production of sheets from nonferrous metals and alloys are considered. Technological possibilities of combined continuous casting and deformation process installation for production of cooper sheets are described. Problem of simultaneous determination of stress-strain state of metal in cyclic deformation zone and stresses in anvils on reduction force in the production on installation of cooper sheets is given. The calculation results are obtained by solving the problems of elastic-plasticity and elastic by fi nite element method using the ANSYS package. The regularities for the distribution of axial and tangential stresses in the cyclic deformation zone in the production on instal lation of cooper sheets are presented. Design scheme and loading pattern of anvil in the production on installation of cooper sheets is described. The values and regularities of axial stresses distribution in anvils of installation depending on reduction force are presented.

Investigation of the hydrodynamic impact of a planing small vessel on a water body

2021 ◽  
pp. 129-134
Author(s):  
Е.А. Лукина ◽  
Е.Ю. Чебан ◽  
Д.В. Никущенко ◽  
А.И. Самосюк ◽  
В.С. Глухова
Keyword(s):  
Small Vessel ◽  
Wave System ◽  
Hydrodynamic Impact ◽  
Tangential Stresses ◽  
Quantitative Characteristics ◽  
Flow Changes ◽  
Planing Vessel ◽  
The Impact ◽  
Flow Study

Рассмотрен экологический аспект использования маломерных глиссирующих судов. В статье представлен способ оценки характеристик потока, возмущённого движением глиссирующего судна. Способ основан на использовании численного метода гидродинамики. Выбраны параметры и зоны исследования потока вокруг корпуса рассмотренного судна, и разработана последовательность действий их определения. Проанализированы качественные картины изменения потока с ростом скорости глиссирующего судна с заданной геометрией, и выделены составляющие наиболее значимые составляющие. Оценены количественные характеристики возмущённого потока: вызванные скорости, расстояние от транца до точки зарождения системы волн, волновые характеристики. Оценка гидродинамического воздействия на водоём была проведена для двух притоков Волги – р.Керженец и р.Сура. Выполнено определение придонных касательных напряжений в выбранных водных объектах в их естественном и возмущённом присутствием судна состоянии. Проведено сравнение рассчитанных касательных напряжений с пороговыми значениями, что позволило оценить влияние движения маломерного судна на донный грунт. The ecological aspect of the use of small-sized planing vessels is considered. The article presents a method for assessing the characteristics of a flow disturbed by the movement of a planing vessel. The method is based on the use of the numerical method of hydrodynamics. The parameters and zones of the flow study around the hull of the vessel under consideration are selected, and a sequence of actions for their determination is developed. Qualitative patterns of flow changes with an increase in the speed of a planing vessel with a given geometry are analyzed, and the most significant components are identified. Quantitative characteristics of the perturbed flow are estimated: induced velocities, distance from the transom to the point of origin of the wave system, wave characteristics. The assessment of the hydrodynamic impact on the reservoir was carried out for two tributaries of the Volga - the Kerzhenets River and the Sura River. The determination of bottom tangential stresses in selected water bodies in their natural and disturbed state by the presence of the vessel was performed. The calculated tangential stresses were compared with threshold values, which made it possible to assess the impact of the movement of a small vessel on the bottom soil.

Determination of Stressed-Deformed State of Fine Disc Tools with Inner Cutting Section under Conditions of their Pre-Stressing

2014 ◽  
Vol 657 ◽  
pp. 73-77
Author(s):  
Aleksandr Mikhaylov ◽  
Hanna Dolhykh ◽  
Maxim Casian
Keyword(s):  
High Speed ◽  
Cutting Tools ◽  
Dynamic Component ◽  
Internal Contour ◽  
Tangential Stresses ◽  
Disc Cutting ◽  
Controlling Elements ◽  
Deformed State ◽  
Resonance Oscillations

The work is dedicated to investigation of the particulars of stressed-deformed state of fine disc tool with internal cutting section under conditions of its pre-stressing. It was suggested for reduction of tools oscillations at cutting to apply pre-stressing of the tools disc by means of controlling elements. The elements, which control the elements stress allowed to eliminate self-oscillations and resonance oscillations of the tool at high-speed materials cutting. In the paper the problem of evaluation of stress and deformed state of fine disc cutting tools with application of the method of finite elements (FEM) was solved. The article also contains epures of tangential stresses inside the internal contour of disc tools. On the basis of the investigations performed the synthesis for design of the main elements of fine disc tools with inner cutting section was carried out. The performed investigation was aimed at improving of the quality and stability of cutting with fine disc tools under conditions of high-velocity cutting and in presence of a dynamic component of the cutting process, ensuring improvement in durability and productivity of the tool.

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