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Materials 2015, 8(11), 7401-7422; doi:10.3390/ma8115385

Quantifying the Mechanical Properties of Materials and the Process of Elastic-Plastic Deformation under External Stress on Material

1
Institute of Physics, Faculty of Mining and Geology, VŠB—Technical University of Ostrava, 708 33 Ostrava, Czech Republic
2
Institute of Clean Technologies for Mining and Utilization of Raw Materials for Energy Use, Faculty of Mining and Geology, VŠB—Technical University of Ostrava, 708 33 Ostrava, Czech Republic
3
RMTVC, Faculty of Metallurgy and Materials Engineering, VŠB—Technical University of Ostrava, 708 33 Ostrava, Czech Republic
4
Nanotechnology Centre, VŠB—Technical University of Ostrava, 708 33 Ostrava, Czech Republic
5
Griffith School of Engineering, Griffith University, Southport Queensland 4214, Australia
6
Faculty of Manufacturing Technologies of TUKE with a seat in Prešov, Prešov 080 01, Slovakia
7
Turkish Naval Academy, 34942 Istanbul, Turkey
8
Laboratory of Mechanical Properties, VÚHŽ, 739 51 Dobrá, Czech Republic
9
Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344Eggenstein-Leopoldshafen, Germany
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Received: 24 August 2015 / Accepted: 26 October 2015 / Published: 3 November 2015
View Full-Text   |   Download PDF [4366 KB, uploaded 3 November 2015]   |  

Abstract

The paper solves the problem of the nonexistence of a new method for calculation of dynamics of stress-deformation states of deformation tool-material systems including the construction of stress-strain diagrams. The presented solution focuses on explaining the mechanical behavior of materials after cutting by abrasive waterjet technology (AWJ), especially from the point of view of generated surface topography. AWJ is a flexible tool accurately responding to the mechanical resistance of the material according to the accurately determined shape and roughness of machined surfaces. From the surface topography, it is possible to resolve the transition from ideally elastic to quasi-elastic and plastic stress-strain states. For detecting the surface structure, an optical profilometer was used. Based on the analysis of experimental measurements and the results of analytical studies, a mathematical-physical model was created and an exact method of acquiring the equivalents of mechanical parameters from the topography of surfaces generated by abrasive waterjet cutting and external stress in general was determined. The results of the new approach to the construction of stress-strain diagrams are presented. The calculated values agreed very well with those obtained by a certified laboratory VÚHŽ. View Full-Text
Keywords: surface topography; mechanical equivalents; plasticity; abrasive waterjet cutting; deformation surface topography; mechanical equivalents; plasticity; abrasive waterjet cutting; deformation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Valíček, J.; Harničárová, M.; Öchsner, A.; Hutyrová, Z.; Kušnerová, M.; Tozan, H.; Michenka, V.; Šepelák, V.; Mitaľ, D.; Zajac, J. Quantifying the Mechanical Properties of Materials and the Process of Elastic-Plastic Deformation under External Stress on Material. Materials 2015, 8, 7401-7422.

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