Domen Šeruga (Author), Marko Nagode (Author), Jernej Klemenc (Author)

Abstract

For stress-strain response simulations and damage prediction of cyclically loaded mechanical components, it is crucial to determine both the stress-strain and durability curves of the materials sued. Round and flat specimens can be used for this purpose, either following standard recommendations for their geometry or by designing a special geometry which enables special requirements, such as initial cracks of various shapes, attachment of an extensometer, special grips for raised temperatures, and so on. However, especially in the case of flat specimens having a slender shape, buckling can occur before the stress or strain values reach a sufficient magnitude in compression. To avoid this, an anti-buckling support can be attached to the specimen, which prevents the occurrence of buckling. In turn, friction occurs between the specimen and the anti-buckling support, which affects the measurement of the stress. If a special sensor is attached under the anti-buckling support, the friction force can be measured and subtracted from the stress signal, leaving only the stress-strain response of the material under investigation. In this study, two materials were investigated during incremental step and variable loading tests: The aluminium alloy AlMgSi0.5 and a biodegradable polylactide.

Keywords

cyclic stress-strain response;aluminium alloy AlMgSi0.5;biodegradable polylactide;anti-buckling support;friction;fatigue;cyclic curves;cross correlation;buckling;variable loading;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 620.1/.2:669.715(045)
COBISS: 16744731 Link will open in a new window
ISSN: 2227-7080
Views: 734
Downloads: 450
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: utrujanje;ciklična krivulja;križna korelacija;uklon;koračni test;naključna obremenitev;trenje;PLA;aluminijeve zlitine;
Type (COBISS): Article
Pages: f. 1-9
Volume: ǂVol. ǂ7
Issue: ǂiss. ǂ3
Chronology: 2019
DOI: 10.3390/technologies7030053
ID: 11199572