Angular displacement determination of an iron board for the cutting plan correction

2016 ◽  
Author(s):  
Martin Vojir ◽  
Leos Beran
Keyword(s):  
Angular Displacement ◽  
Cutting Plan

Durability Determination of the Bearing Structure of an Open Freight Wagon Body Made of Round Pipes during its Transportation on the Railway Ferry

2019 ◽  
Vol 21 (1) ◽  
pp. 28-34
Author(s):  
Oleksij Fomin ◽  
Juraj Gerlici ◽  
Alyona Lovska ◽  
Kateryna Kravchenko ◽  
Pavlo Prokopenko ◽  
...  
Keyword(s):  
Angular Displacement ◽  
Vertical Direction ◽  
Longitudinal Axis ◽  
The Body ◽  
Maximum Acceleration ◽  
Upper Deck ◽  
International Transport ◽  
The Cost ◽  
New Generation

In order to reduce the cost of designing and manufacturing of the new-generation open wagons, it is proposed to construct their carrying systems from round pipes. In order to exploit the proposed designs of wagons in international rail-water communication, it is assumed that they will be equipped with assemblies for fastening of chain binders. The maximal values of accelerations, as components of dynamic load acting on open wagons, made from round pipes during their transportation on a railway ferry, are determined. It is established that when moving the body in the vertical direction for a wagon located on the upper deck, the maximum acceleration value is 0.84g, with angular displacement relative to the transverse axis for the extreme from the anchor point of the wagon body - is 0.1 g, with angular displacement around the longitudinal axis for the extreme from the bulwark of the body of the wagon - is 0.24g. The conducted researches will enable increased efficiency of operation of open wagons through international transport corridors.

scholarly journals Angle gage for torsion testing

2018 ◽  
Vol 84 (6) ◽  
pp. 59-62
Author(s):  
A. D. Khvan ◽  
D. V. Khvan ◽  
A. A. Voropaev ◽  
Yu. B. Rukin
Keyword(s):  
Cross Sections ◽  
Mechanical Characteristics ◽  
Angular Displacement ◽  
Reference Value ◽  
Planetary Gear ◽  
Cylindrical Sample ◽  
Working Length ◽  
Angular Displacements ◽  
Von Mises

Processing of metals by pressure suggests using of various measuring devices. We developed and manufactured a device for measuring angular deformations upon elastic and plastic torsion of circular specimens. The design is based on the operation principle of the planetary mechanism without a movable solar central wheel. Design of the device is based on the Boyarshinov concept added with a round protractor with a graduated scale from 0 to 360° and rotating needle placed on the axis to indicate the angular displacement. The use of the planetary gear significantly improves the accuracy of measuring the angles of rotation of the cross sections of the sample relative to each other at a distance of the calculated length. To low the weight of the device, the main parts were made of aluminum alloy D16Т. Rated diameters of the central wheel and satellite are D1 = 220 mm, D3 = 20 mm, respectively; the linkage module m = 1 mm; the number of teeth on the wheel and satellite is 220 and 20, respectively. Laboratory tests of the device were carried out on a KM-50 torsional machine using a cylindrical sample with a diameter of 15 mm and a working length of 120 mm made of steel 40Kh. The results provided determination of the elastic shear modulus with a deviation of ~2.5% of the reference value. Experimental data were used to plot the torsion diagram and then to get shear diagram τ = τ(γ) according to P. Ludwik’s formula. This diagram was transformed into the hardening curve σ = σ(e) using von Mises theory of the plasticity. The obtained mechanical characteristics allowed us to draw a conclusion on the essential accuracy of measuring angular displacements using the developed device. Thus, the developed and easy to use device can be recommended as testing equipment for determination of the mechanical characteristics of materials under conditions of shear deformations.

Determination of Preferred Orientation in Crystals from Surface Diffraction Techniques

1971 ◽  
Vol 29 ◽  
pp. 186-187
Author(s):  
Isaac W. Diggs
Keyword(s):  
Electron Microscope ◽  
Angular Displacement ◽  
Preferred Orientation ◽  
Photographic Film ◽  
Orientation Data ◽  
Pattern Change ◽  
Diffraction Patterns ◽  
Nickel Crystals ◽  
Surface Diffraction

This paper will examine a method of determining preferred orientation in reflection diffraction specimen without the use of a camera constant for the electron microscope. This method was devised in the absence of being able to find any such method in the literature. The method was used to study the orientation of nickel crystals grown on the faces of Al2O3 substrates. The diffraction work was done with 75kv (.0446A) electrons on a model HU-11 Hitachi Electron Microscope. Diffraction patterns were recorded on a photographic film in such a manner that successive frames showed pattern change as a function of angular displacement (tilt rotation).If for any surface diffraction pattern, the orientation data of the crystals involved were desired, the following procedure would yield accurate results. The first action is to reproduce the pattern at a convenient size. This can be done by photographic means or by any other means available. Next, the interplanor spacings should be measured for at least three sets of planes which appear in the pattern.

Determination of the kinematic coefficient of uneven rotation of the gear-belt transmission with a compound pulley

2020 ◽  
pp. 3-6
Author(s):  
J. Muhamedov ◽  
V.M. Turdaliev ◽  
A.A. Kosimov
Keyword(s):  
Elastic Modulus ◽  
Angular Displacement ◽  
Rubber Sleeve ◽  
Elastic Rubber ◽  
Kinematic Coefficient ◽  
Belt Transmission ◽  
Analytical Expressions

Known drive gears are analyzed. A gear-belt transmission with a composite roll pulley, including an elastic rubber sleeve, is proposed. Analytical expressions are obtained for determining the coefficient of kinematic non-uniformity of rotation of the driven pulley, its speeds and angular displacement as a result of deformation of the sleeve. Keywords gear-belt transmission, pulley, speed, coefficient of kinematic non-uniformity of rotation, moment, elastic modulus, stiffness, load. [email protected]

Determination of small angular displacement by moiré fringes of matched radial–parallel gratings

1997 ◽  
Vol 36 (13) ◽  
pp. 2848 ◽  
Author(s):  
B. J. Kim ◽  
J. S. Song ◽  
J. T. Kim ◽  
J. H. Jo ◽  
S. Chang ◽  
...  
Keyword(s):  
Angular Displacement ◽  
Moiré Fringes

The Analysis of the Flutter Region of Wind Turbine Blade

2013 ◽  
Vol 423-426 ◽  
pp. 1520-1523
Author(s):  
Hao Wang ◽  
Bing Ma ◽  
Jiao Jiao Ding
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Aerodynamic Force ◽  
Angular Displacement ◽  
Wind Turbine Blade ◽  
Speed Ratio ◽  
Tip Speed Ratio ◽  
Flutter Analysis ◽  
The Given

As the wind turbine blade is becoming larger and larger, the flutter of the wind turbine blade has been paid great attention by many fields. The flutter region of the wind turbine blade airfoil was focused on. The equation of motion for the flutter of blade airfoil was established, based on the simplified aerodynamic force and torque. The flutter analysis of wind turbine blade was carried out with the four-order Runge-Kutta methods, and so the flutter region of the blade airfoil can be obtained. The results show that, there are two critical tip speed ratios for the given blade airfoil. When the tip speed ratio is below the low critical speed ratio, the blade airfoil is convergent. At the low tip speed ratio, the blade airfoil system will become divergent from convergent condition. When the tip speed ratio is between the low critical tip speed ratio and the high one, the blade airfoil system will diverge. At the high tip speed ratio, the system will become convergent from divergent condition. When the tip speed ratio is above the high critical tip speed ratio, the blade airfoil system will converge again. In addition, the torsional angular displacement and velocity always keep convergent, the flap velocity is slightly divergent, because they are not sensible to the change of the tip speed ratio, and they are difficult to cause flutter, so the torsional motion will be more stable than flap motion for the given blade airfoil. It can provide one of references for the determination of the blade airfoil.

Laboratory Station for Research on Angular Translocation in Human Lower Limbs

2013 ◽  
Vol 199 ◽  
pp. 326-331 ◽  
Author(s):  
Michał Ostaszewski ◽  
Franciszek Siemieniako
Keyword(s):  
Lower Limb ◽  
Angular Displacement ◽  
Lower Limbs ◽  
Lower Limb Exoskeleton ◽  
Measuring Station ◽  
Movement Parameters

In the article a construction of a laboratory station for determination of angles in three kinematic pairs of human lower limbs exoskeleton is described. The constructed exoskeleton is supposed to support human lower limbs only on plane vertical to ground. In article the results of measurement of movement parameters of walking human lower limbs obtained using the measuring station. Measurement of angular displacement on the station is realized using six angular displacement absolute transducers. The station is also one of the components contained in lower limb exoskeleton being constructed. The measuring construction will be used to identify actuating systems during exoskeleton construction phase.

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

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