Tag Archives: modulus of elasticity

xxx V. Kažimírová, Ľ. Kubík, J. Chrastina and T. Giertl
Determination of mechanical properties of poppy waste pellets
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Determination of mechanical properties of poppy waste pellets

V. Kažimírová¹*, Ľ. Kubík², J. Chrastina¹ and T. Giertl³

¹Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Building Equipment and Technology Safety, Tr.A. Hlinku 2, SK949 76 Nitra, Slovak Republic
²Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Physics, Tr.A. Hlinku 2, SK949 76 Nitra, Slovak Republic
³Slovak University of Agriculture in Nitra, Faculty of European Studies and Regional Development, Department of Regional Bioenergy, Tr.A. Hlinku 2, SK949 76 Nitra, Slovak Republic
*Correspondence: viera.kazimirova@uniag.sk

Abstract:

The work deals with evaluation of mechanical properties three types of pellet samples produced from poppy waste. The pellets were submitted to compressive loading. The compressive loading curves of dependencies of force on strain and force on time were realised. Certain mechanical parameters were determined, namely the diameter of the sample, length of the sample, force at 10% of strain, force in the first maximum of the force – strain curve, strain in the first maximum of the force – strain curve, modulus of elasticity, force in the inflex point of the force – time and force – strain curves and strain and stress in the inflex point of the force – time and force – strain curves. The work lists correlations of mechanical parameters of individual pellet types. The pellet type 1 made only of ground poppy head mass has shown the best results, the pellet type 3 consisting of ground poppy heads after harvest and waste from sieving of poppy seeds in mass proportion 1 : 1 has shown the worst results.

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1006–1013 P. Hrabě,, D. Herak and Č. Mizera
Utilization of the elementary mathematical model for description of mechanical behaviour of composites reinforced by Ensete Ventricosium fibres
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Utilization of the elementary mathematical model for description of mechanical behaviour of composites reinforced by Ensete Ventricosium fibres

P. Hrabě¹,*, D. Herak² and Č. Mizera²

¹ Czech University of Life Sciences, Faculty of Engineering, Department of Material Science and Manufacturing Technology, Kamýcká 129, CZ165 21 Prague, Czech Republic
² Czech University of Life Sciences, Faculty of Engineering, Department of Mechanical Engineering, Kamýcká 129, CZ165 21 Prague, Czech Republic
*Correspondence: hrabe@tf.czu.cz

Abstract:

This article is focused on the utilization of elementary mathematical model for description of mechanical behaviour of composites materials reinforced by fibres of Ensete Ventricosium under tension loading. Elementary mathematical model was derived for unidirectional fibres oriented in the direction of tension loading and it was experimentally verified. As a matrix it was used a two-component resin Gluepox Rapid and as a reinforcement they were used fibres of Ensete Ventricosum. Experimental samples with different volume fibres ratio contained 40, 60, 80, 100, 120 and 140 fibres were tested on tensile equipment MP Test – 5.050. In this study the elementary mathematical model was utilized for description of dependency between modulus of elasticity, rupture stress and volume fibres ratio. From this research follows that data determined from derived elementary mathematical model are significant (on the level of significance 0.05) with experimentally determined data. This derived elementary mathematical model can be used as background for further research related to the modelling of mechanical behaviour of composites reinforced by fibres.

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