Life predictions by three creep-fatigue interaction models: influence of multiaxiality and time-variable loadings
作者:
BertiniL.,
期刊:
Materials at High Temperatures
(Taylor Available online 1991)
卷期:
Volume 9,
issue 1
页码: 23-29
ISSN:0960-3409
年代: 1991
DOI:10.1080/09603409.1991.11689636
出版商: Taylor&Francis
关键词: life prediction;creep-fatigue interaction;stainless steel;variable loading conditions
数据来源: Taylor
摘要:
Life predictions given by three creep-fatigue damage models, namely the‘continuous damage model’, the‘damage rate approach’and the‘time and cycle fractions summation’method, were evaluated for over 200 high temperature fatigue tests reported in the literature. These tests, which were conducted on AISI 304 and 316 stainless steels, include several different multiaxial and time-variable loading conditions (in-phase and out-of-phase biaxial stress, various strain waveforms, complex loading histories, etc.) whose influence on the distribution of the ratio between predicted and observed cycles to failure was analysed. Results obtained by the three models are discussed, emphasizing differences in accuracy and cases in which the creep-fatigue behaviour does not appear to be satisfactorily predicted.
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