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
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.