Results 231 to 240 of about 221,463 (266)

DETERMINATION OF THE FLOW CURVE USING THE MODIFIED RASTEGAEV TEST

Conference proceedings : 60th Anniversary of the Association of Production Engineering of Serbia
The application of a modified Rastegaev test for determining flow curves is presented in this paper, as these curves are essential for accurate modeling and simulation of metal forming processes. First, a comprehensive overview of conventional flow curve determination methods is provided, including tensile, compression and tensile testing techniques ...
Mladomir Milutinovic, Dejan Movrin, Milica Panic, Marko Vilotic, Nemanja Prodanovic   +4 more
openaire   +1 more source

Factors Determining the Shape of Maximum Expiratory Flow‐Volume Curves in Childhood Asthma

Australian and New Zealand Journal of Medicine, 1973
Summary: In 12 children with bronchial asthma, the factors determining maximum expiratory flow at different levels of lung inflation have been examined during forced vital capacity manoeuvres. The findings confirm the histopathological evidence of major changes in the small and medium sized airways in asthma.
L I, Landau, D J, Hill, P D, Phelan
openaire   +2 more sources

Method of determining molar mass distribution from curves of polymer melt flow

Polymer Science U.S.S.R., 1988
Abstract Based on a theoretical model previously developed, linking the flow curve of polymer melts with MMD, model functions of distribution were used to show the possibility of determining parameters of MMD of given form using flow curves.
A.Ya. Malkin, A.Ye. Teishev
openaire   +1 more source

An appraisal of procedures to determine the flow curve of cement slurries

Journal of Petroleum Science and Engineering, 2017
Abstract The performance of protocols usually employed for the rheological characterization of oil well cement slurries is investigated. To this end two cement slurries were employed, namely Paste A and Paste B. The API procedure is addressed and a modification to it is investigated.
Elias C. Rodrigues, Flávio de Andrade Silva, Cristiane Richard de Miranda, Gabriella M. de Sá Cavalcante, Paulo R. de Souza Mendes   +4 more
openaire   +1 more source

Determination of the flow stress-strain curves for metals from axisymmetric upsetting

Journal of Mechanical Working Technology, 1981
Abstract A new test method has been developed for determining flow stress-strain curves of materials used in bulk deformation processes such as extrusion, forging and croping. These curves are of vital importance in the industry. The test piece is made of a 14 mm diameter, 21 mm height cylinder which is deformed between two flat dies.
J.C. Gelin, J. Oudin, Y. Ravalard
openaire   +1 more source

Modified Hydraulic Bulging in Determination of Flow stress Curve

2011
The objective of this study is an original method of the stress strain diagram acquisition named modified hydraulic bulging on the sphere. The method has been derived from the hydraulic bulging test. The flow stress-true strain curves were established for aluminium sheet on the experimental apparatus designed for both methods.
Math, Miljenko, Piljek, Petar, Keran, Zdenka   +2 more
openaire   +1 more source

Formulae Verification for the Flow Curve Determination Due to Numerical Simulation

2011
The axisymmetric specimen applied in the tensile test is numerically characterised within this chapter. Subsequently, the simplifying assumptions of the classical approaches are verified utilising the results obtained from the numerical simulation and the errors were determined.
Magdalena Gromada, Gennady Mishuris, Andreas Öchsner   +2 more
openaire   +1 more source

Friction Correction of Austenite Flow Stress Curves Determined under Axisymmetric Compression Conditions

Experimental Mechanics, 2019
The experimental flow stress curves of structural steels obtained from axisymmetric compression tests conducted under hot-working conditions very often include the frictional effects present at the tool/specimen interface. Such effects have a significant influence on the flow stress and therefore, should be corrected prior to any quantitative analysis ...
Puchi-Cabrera, Eli Saúl, Guerin, Jean-Dominique, La Barbera-Sosa, José Gregorio, Álvarez-Hostos, Juan Carlos, Moreau, Philippe, Dubar, Mirentxu, Dubar, Laurent   +6 more
openaire   +2 more sources

Squeeze film rheology of polymer melts: Determination of the characteristic flow curve

Journal of Applied Polymer Science, 1994
AbstractThe advantage of the constant‐speed squeeze film flow is that the shear rate is not constant but changes with gap height and position. This allows the rheological characterization of a material to be carried out in a shorter amount of experimentation time. A method for determining the characteristic flow curve is proposed.
Hoang T. Pham, Eberhard A. Meinecke
openaire   +1 more source

Large strain flow curve identification for sheet metal

Journal of Materials Processing Technology, 2022
Heinrich Traphöner
exaly