Dejan Tomažinčič (Author), Matej Borovinšek (Author), Zoran Ren (Author), Jernej Klemenc (Author)

Abstract

The fatigue life of a high-pressure die-cast alloy, AlSi9Cu3, with significant porosity is investigated. Standard specimens were cyclically loaded (R =-1) until fatigue rupture occurred. The specimens were [micro]-CT scanned to obtain a 3D representation of the pores. Models were used to computationally predict the fatigue life using two different methods. First, the fatigue life was predicted using a notch-strain approach combined with a Coffin- Manson durability relationship for homogeneous material. Second, the fatigue life was predicted using an homogenised un-notched model that was combined with an adapted Coffin-Manson relationship which consid-ered a fatigue life reduction due to different pore effects.

Keywords

low-cycle fatigue;alloy AlSi9Cu3;porosity;notch-strain approach;finite element removal;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 519.876.5:620.178.3(045)
COBISS: 46594307 Link will open in a new window
ISSN: 0142-1123
Views: 326
Downloads: 54
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary abstract: Raziskava zajema analizo dobe trajanja zlitine AlSi9Cu3 s prisotno visoko stopnjo poroznosti. Preizkušanci standardnih oblik so bili ciklično obremenjeni (R = -1), do nastalega utrujenostnega loma. Vzorci so bili ob tem [mikro]-CT skenirani, da smo določili 3D geometrijo por. Modeli so bili nato uporabljeni pri izračunu dobe trajanja po dveh različnih metodah. Prvič, dobo trajanja smo napovedali po pristopu z zareznim učinkom v kombinaciji s Coffin-Manson razmerjem za homogeni material. Drugič, dobo trajanja smo napovedali ob uporabi homogenega idealiziranega modela, v kombinaciji s prilagojenim nivojem Coffin-Manson krivulje, ki upošteva znižanje dobe trajanja zaradi različnih učinkov por.
Secondary keywords: malo-ciklično utrujanje;zlitina AlSi9Cu3;poroznost;pristop z zareznim učinkom;odstranitev končnega elementa;
Type (COBISS): Article
Embargo end date (OpenAIRE): 2023-01-14
Pages: str. 1-12
Issue: ǂVol. ǂ144
Chronology: Mar. 2021
DOI: 10.1016/j.ijfatigue.2020.106061
ID: 12383623