Random cyclic stress-strain responses of a stainless steel pipe-weld metalI - a statistical investigation

Citation
Yx. Zhao et al., Random cyclic stress-strain responses of a stainless steel pipe-weld metalI - a statistical investigation, NUCL ENG DE, 199(3), 2000, pp. 303-314
Citations number
14
Categorie Soggetti
Nuclear Emgineering
Journal title
NUCLEAR ENGINEERING AND DESIGN
ISSN journal
00295493 → ACNP
Volume
199
Issue
3
Year of publication
2000
Pages
303 - 314
Database
ISI
SICI code
0029-5493(200007)199:3<303:RCSROA>2.0.ZU;2-S
Abstract
This paper pays a special attention to the issue that there is a significan t scatter of the stress-strain responses of a nuclear engineering material, 1Cr18Ni9Ti stainless steel pipe-weld metal. Statistical investigation is m ade to the cyclic stress amplitudes of this material. Three considerations are given. They consist of the total fit, the consistency with fatigue phys ics and the safety in practice of the seven commonly used statistical distr ibutions, namely Weibull (two- and three-parameter), normal, lognormal, ext reme minimum value, extreme maximum value and exponential. Results reveal t hat the data follow meanwhile the seven distributions but the local effects of the distributions yield a significant difference. Any of the normal, lo gnormal, extreme minimum value and extreme maximum value distributions migh t be an appropriate assumed distribution for characterizing the data. The n ormal and extreme minimum models are excellent. Other distributions do not fit the data as they violate two or three of the mentioned considerations. (C) 2000 Elsevier Science S.A. All rights reserved.