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

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Abstract
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.

Language:English
Keywords:magnesium AZ31, variable loading history, low-cycle fatigue, hysteresis-loop model, energy approach
Work type:Article (dk_c)
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
NTF - Faculty of Natural Sciences and Engineering
Year:2019
Publication status in journal:Published
Article version:Publisher's version of article
Number of pages:24 str.
Numbering:Vol. 12, iss. 22, art. 3692
UDC:620.178.3(045)
ISSN on article:1996-1944
DOI:10.3390/ma12223692 This link opens in a new window
COBISS.SI-ID:16894235 This link opens in a new window
Publication date in RUL:11.11.2019
Views:508
Downloads:459
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Record is a part of a journal

Title:Materials
Shortened title:Materials
Publisher:MDPI
ISSN:1996-1944
COBISS.SI-ID:33588485 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:08.11.2019

Secondary language

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

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
izpis_stevilka_projekta:P2-0182
Name:Razvojna vrednotenja

Funder:Drugi - Drug financer ali več financerjev
Funding Programme:Ministry of Education, Science and Sport
izpis_stevilka_projekta:C3330-16-529001
Acronym:EVA4green

Funder:Drugi - Drug financer ali več financerjev
Funding Programme:Ministry of Education, Science and Sport
izpis_stevilka_projekta:OP20.00362
Acronym:EVA4green

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