scholarly journals DETERMINATION OF CONTACT PRESSURE AT PNEUMATIC SEAL/ROD INTERFACE FROM RADIAL FORCE MEASUREMENT

2017 ◽  
Author(s):  
GUIDO BELFORTE ◽  
MARCELLO CONTE ◽  
ANDREA MANUELLO ◽  
LUIGI MAZZA ◽  
TERENZIANO RAPARELLI ◽  
...  
Keyword(s):  
Contact Pressure ◽  
Force Measurement ◽  
Radial Force

Experimental Determination of Optimal Speeds for Alloy Steels in Plane Turning

2008 ◽  
Author(s):  
T. Srikanth ◽  
V. Kamala
Keyword(s):  
Surface Roughness ◽  
Force Measurement ◽  
Cutting Speed ◽  
Vital Role ◽  
The Other ◽  
Depth Of Cut ◽  
Work Piece ◽  
Material Interface ◽  
Alloy Steels

In machining, speeds play vital role. The operator should know exactly the speed at which machining should be performed to get the required surface finish. In this paper, an attempt is made to determine the optimal cutting speed for machining of alloy steels. Three work piece materials having different hardness are taken and machined using a round nose tool with a coated tip. The tool dynamometer is attached to the tool post for force measurement. Turning operation on the work piece is performed on lathe at four different speeds, keeping the feed and depth of cut constant. Cutting forces acting on the tool, temperature at the tool and material interface are recorded. Power consumed being determined by a wattmeter and surface roughness values are measured. The same procedure is repeated for the other two work-pieces materials and optimal speeds for machining are determined for the three specimens. The results obtained are compared with the theoretical values and found to be very close.

Bohrwiderstandsmessungen, eine neue und standardisierbare Methode zur Bestimmung der Kohäsion von Naturstein: Entwicklung eines Prototypes und dessen Erprobung / Drilling force measurement system, a new standardisa i methodology to determine the stone cohesion: Prototype design and validation

2000 ◽  
Vol 6 (2) ◽  
pp. 115-132 ◽  
Author(s):  
P. Tiano ◽  
C. Filareto ◽  
S. Ponticelli ◽  
M. Ferrari ◽  
E. Valentini
Keyword(s):  
Force Measurement ◽  
Direct Determination ◽  
Drilling Force ◽  
System A ◽  
Stone Materials ◽  
Force Measurement System ◽  
Drilling Resistance ◽  
Non Destructive

Abstract In the field of conservation of monumental buildings actually a standard methodology is lacking, with which it is possible to determine with the same sensitivity and reliability the "stone hardness" both at the superficial surface and at larger depths (few centimetres), both in laboratory and in situ. The use of the drilling resistance to determine the stone hardness is a very recent application and few working outdoor devices exist. The objective of this work is to validate a new and improved system to assess the drilling resistance of stones. The DFMS is portable and a quasi non-destructive device for direct determination of the "cohesion" of stone materials through the determination of their drilling resistance. The best operational features of the prototype have been established together with the assessment of the sensitivity and reliability of the system.

Quantitative determination of joint incongruity and contact pressure in the human hip joint during the gait-cycle

1998 ◽  
Vol 31 ◽  
pp. 35
Author(s):  
R.V. Eisenhart-Rothe ◽  
H. Witte ◽  
M. Steinlechner ◽  
M. Müller-Gerbl ◽  
R. Putz ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Contact Pressure ◽  
Hip Joint ◽  
Gait Cycle ◽  
Joint Incongruity

scholarly journals A new method for hardness determination from depth sensing indentation tests

1996 ◽  
Vol 11 (12) ◽  
pp. 2964-2967 ◽  
Author(s):  
J. Gubicza ◽  
A. Juhász ◽  
J. Lendvai
Keyword(s):  
Contact Pressure ◽  
Elastic Material ◽  
Depth Sensing ◽  
Hardness Number ◽  
Indentation Tests ◽  
Semiempirical Formula ◽  
Loading And Unloading ◽  
The Mean ◽  
Limiting Case

A new semiempirical formula is developed for the hardness determination of the materials from depth sensing indentation tests. The indentation works measured both during loading and unloading periods are used in the evaluation. The values of the Meyer hardness calculated in this way agree well with those obtained by conventional optical observation, where this latter is possible. While the new hardness formula characterizes well the behavior of the conventional hardness number even for the ideally elastic material, the mean contact pressure generally used in hardness determination differs significantly from the conventional hardness number when the ideally elastic limiting case is being approached.

The Analysis on Controllability of Angular Ball Bearings with Considering the Installation Errors

2012 ◽  
Vol 217-219 ◽  
pp. 2740-2745 ◽  
Author(s):  
Shu Min Wan ◽  
Jing Huai Li ◽  
Xi Zhi Wu ◽  
Bin Lin
Keyword(s):  
Axial Force ◽  
Axial Load ◽  
Radial Force ◽  
Ball Bearings ◽  
Complex Load ◽  
Bearing Load ◽  
The Impact

A new definition was proposed-bearing control; in the case the bearing subjects to both radial and axial force only, the deformation is roughly symmetry about the Y-axis. When axial preload is 0.4 times greater than radial force, the bearing is controllable. In the case the bearing is exposed to pure torque and axial load, and axial preload is 50 times of the torque, the bearing is controllable. When complex load is applied on the bearing and axial preload is more than 0.418Fr+0.46Fa, the bearing is controllable. The application of spring equivalent bearing to simplify the model; the analysis of the impact on bearing exerted by a variety of installation errors and determination of the best installation form; the relation between installation errors and bearing load, and the relation between axial preload and the best installation form under the condition that the bearing is controllable, all of those are mentioned.

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