Publication detail
EVALUATION OF MODULI OF ELASTICITY FOR THIN LAYERS
BURŠA, J. JANÍČEK, P.
Czech title
Určování modulů pružnosti tenkých vrstev
English title
EVALUATION OF MODULI OF ELASTICITY FOR THIN LAYERS
Type
journal article - other
Language
en
Original abstract
The paper extends the applicability of the measuring method related to the evaluation of moduli of elasticity for tension and compression, as presented earlier. Moduli of elasticity for thin layers (e.g. plasmatic coatings) can be evaluated by this method based upon a four-point bending test. The test is realized through a rectangular prismatic beam made of the material with known linear elastic properties. On the top and bottom sides of the beam, thin layers are applied, e.g. plasmatic coatings – the elastic constants of which are to be determined. Strains on the surfaces of the layers are measured with electric resistance strain gauges. A mathematical theory derived enables us to determine the moduli of elasticity in tension and in compression from the measured strains using a system of two algebraic equations. The method described is also convenient for evaluation of moduli of elasticity for plasmatic coatings under which an inter-layer is created on the basic material provided that elastic properties of this inter-layer are known.
Czech abstract
Článek popisuje novou metody k určování modulů pružnosti tenkých vrstev pomocí tříbodového ohybu.
English abstract
The paper extends the applicability of the measuring method related to the evaluation of moduli of elasticity for tension and compression, as presented earlier. Moduli of elasticity for thin layers (e.g. plasmatic coatings) can be evaluated by this method based upon a four-point bending test. The test is realized through a rectangular prismatic beam made of the material with known linear elastic properties. On the top and bottom sides of the beam, thin layers are applied, e.g. plasmatic coatings – the elastic constants of which are to be determined. Strains on the surfaces of the layers are measured with electric resistance strain gauges. A mathematical theory derived enables us to determine the moduli of elasticity in tension and in compression from the measured strains using a system of two algebraic equations. The method described is also convenient for evaluation of moduli of elasticity for plasmatic coatings under which an inter-layer is created on the basic material provided that elastic properties of this inter-layer are known.
Keywords in English
moduli of elasticity, measuring method, four-point bending, strains, plasmatic coating, EUCOR-ceramics
RIV year
2003
Released
01.01.2003
ISSN
1210-2717
Journal
Inženýrská mechanika - Engineering Mechanics
Volume
10
Number
2
Pages count
10
BIBTEX
@article{BUT41880,
author="Jiří {Burša} and Přemysl {Janíček},
title="EVALUATION OF MODULI OF ELASTICITY FOR THIN LAYERS",
journal="Inženýrská mechanika - Engineering Mechanics",
year="2003",
volume="10",
number="2",
month="January",
issn="1210-2717"
}