Title: Use of elastic stresses for a multiaxial fatigue prediction
Authors: Růžička, Milan
Papuga, Jan
Hrubý, Zbyněk
Doubrava, Karel
Citation: Applied and Computational Mechanics. 2007, vol. 1, no. 2, p. 631-640.
Issue Date: 2007
Publisher: University of West Bohemia
Document type: článek
URI: http://www.kme.zcu.cz/acm/old_acm/full_papers/acm_vol1no2_p075.pdf
ISSN: 1802-680X (Print)
2336-1182 (Online)
Keywords: výpočet víceosé únavy;vysokocyklová únava;nízkocyklová únava;matematické modelování
Keywords in different language: multiaxial fatigue calculation;high-cycle fatigue;low-cycle fatigue;mathematical modelling
Abstract: A new computational method derived from Papuga PCr multiaxial criterion is presented in the paper. While the PCr criterion is suitable for a comparison of a local multiaxial loading with a fatigue limit, the PCF criterion derived is focused on computation within a finite life. Its use is intended for a variable amplitude multiaxial loading, where the Palmgren-Miner damage cumulation law is applied. The PCF method is based on local elastic stresses and their action within the standard S-N curves of smooth specimens. No arrangement concerning the stress gradient effect was applied, since the experiments serving for comparison were carried on smooth and unnotched specimens. The experimental set covers different load paths applied to specimens manufactured of CSN 41 1523 structural steel. Computational results are promising for cases with load paths formed from single unclosed lines, but for the cases with load paths related to closed constructs it provides too conservative solution. A need for a further term counting for the multiaxial hardening is discussed.
Rights: © 2007 University of West Bohemia. All rights reserved.
Appears in Collections:Volume 1, number 2 (2007)
Volume 1, number 2 (2007)

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Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/1955

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