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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
FITTING OF ELASTIC MODULUS ON THE INTERFACE BETWEEN TWO MATERIALS
 Kocmanová, Lenka ; Materna, A. ; Haušild, P. ; Matějíček, Jiří
The paper is aimed to determinate of Young modulus near a sharp interface. The 3D elastic numeric model was used for prediction of the Young modulus. The simulated specimen was composed of tungsten and steel. The interface was plane which a normal vector was perpendicular to the indentation force. The indenter geometry for which numerical solutions were accomplished was a rounded cone indenter. An indentation depth is studied as function of a distance indenter-interface. The distance was normalized by depth of indentation. All values of Young modulus lay on one curve after distance normalization due to elasticity. The curve was fitted by inverse beta function. The curve determine the size of area of one material influenced by a second material.
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Determination of mechanical properties by instrumented indentation with spherical indentor
 Čech, J. ; Haušild, P. ; Nohava, J. ; Matějíček, Jiří
Mechanical properties on individual phases in spark plasma sintered tungsten-steel composites were determined by instrumented indentation with a spherical indentor. The results were processed by Oliver-Pharr method, stress-strain curves were calculated by Tabor equations.
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Special methods for observation of failure of plasma-processed materials
 Mušálek, Radek
This paper presents examples of several methods, which may be used for failure study of materials prepared by plasma processing - plasma spraying or plasma sintering. Microstructure of these materials significantly differs from that of bulk construction materials which limits use of conventional methods. Typically, because not enough volume of material in one piece is available for testing. Aim of this paper is to ilustrate benefits of using combined study of materials changes during loading and their macroscopic properties
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