Comprehensive modelling of the hysteresis loops and strain-energy density for low-cycle fatigue-life predictions of the AZ31 magnesium alloy
Klemenc, Jernej (Author), Šeruga, Domen (Author), Nagode, Aleš (Author), Nagode, Marko (Author)

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Magnesium is one of the lightest metals for structural components. It has been used for producing various lightweight cast components, but the application of magnesium sheet plates is less widespread. There are two reasons for this: (i) its poor formability at ambient temperatures; and (ii) insufficient data on its durability, especially for dynamic loading. In this article, an innovative approach to predicting the fatigue life of the AZ31 magnesium alloy is presented. It is based on an energy approach that links the strain-energy density with the fatigue life. The core of the presented methodology is a comprehensive new model for tensile and compressive loading paths, which makes it possible to calculate the strain-energy density of closed hysteresis loops. The model is universal for arbitrary strain amplitudes. The material parameters are determined from several low-cycle fatigue tests. The presented approach was validated with examples of variable strain histories.

Keywords:magnesium AZ31, variable loading history, low-cycle fatigue, hysteresis-loop model, energy approach
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Number of pages:f. 1-24
Numbering:Vol. 12, iss. 22
ISSN on article:1996-1944
DOI:10.3390/ma12223692 Link is opened in a new window
COBISS.SI-ID:16894235 Link is opened in a new window
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Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Funding Programme:Programska skupina
Project no.:P2-0182
Name:Razvojna vrednotenja

Funder:Drugi - Drug financer ali več financerjev
Funding Programme:OP20.00362
Project no.:C3330-16-529001
Name:Ekološki varen avtomobil za zeleno mobilnost

Secondary language

Keywords:magnezij, utrujanje, histerezna zanka, energijska metoda, naključna obremenitev

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