Damir Jelaska (Author), Srečko Glodež (Author), Srđan Podrug (Author)

Abstract

For combined HCF/LCF loading, whose stress history is simplified so that it consists of one LCF stress block with a number of cycles equal to the number of start-up in-service operations and one HCF stress block with all HCF cycles summed-up, we derived the closed form expression for estimating both the crack initiation life and the crack propagation life at combined HCF/LCF loading. As an example of use, Smith and Haigh diagrams were obtained for titanium alloy (Ti-6Al-4V) components, which enable to estimate the fatigue strength for the designed fatigue life, known load ratio and certain number of HCF cycles per one combined stress block.

Keywords

strojni elementi;utrujanje;napoved življenjsle dobe;začetek razpoke;širjenje razpoke;časovni potek napetosti;machine elements;fatigue;service life prediction;crack initiation;crack growth;stress history;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FS - Faculty of Mechanical Engineering
UDC: 621.833:539.388.1
COBISS: 8422422 Link will open in a new window
ISSN: 0354-2009
Views: 1788
Downloads: 33
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Other data

Secondary language: English
Secondary keywords: strojni elementi;utrujanje;napoved življenjsle dobe;začetek razpoke;širjenje razpoke;časovni potek napetosti;
URN: URN:SI:UM:
Pages: str. 635-646
Volume: ǂVol. ǂ3
Issue: ǂno. ǂ13
Chronology: 2003
ID: 8718877