Combined action of crack closure and residual stress under periodic overloads: A fractographic analysis; International Journal of Fatigue; Vol. 82, pt. 3

Combined action of crack closure and residual stress under periodic overloads: A fractographic analysis; International Journal of Fatigue; Vol. 82, pt. 3

Bibliographic Details
Parent link:International Journal of Fatigue: Scientific Journal.— , 1979-
Vol. 82, pt. 3.— 2016.— [P. 667–675]
Corporate Author: Национальный исследовательский Томский политехнический университет (ТПУ) Институт физики высоких технологий (ИФВТ) Кафедра материаловедения в машиностроении (ММС)
Other Authors: Ramasubbu S. Sunder, Andronik A. V. Artem Valerjevich, Byakov A. V. Anton Viktorovich, Eremin A. V. Alexandr Vyacheslavovich, Panin S. V. Sergey Viktorovich, Savkin A. N. Aleksey Nikolaevich
Summary:Title screen
The close relationship between sequence-sensitive near-tip residual stress and threshold stress intensity raises questions about load interaction models currently in use to estimate fatigue crack growth under variable amplitude loading. In an attempt to address them, experiments were performed on an Al–Cu alloy under specially designed load sequences with periodic overloads. Fractographic evidence from these tests confirms that fatigue crack closure, together with sequence sensitive variation in threshold stress intensity appear to explain all observed results. The fractographic data provide quantitative inputs for improved modeling of variable-amplitude fatigue, particularly at near-threshold crack growth rates. This study appears to suggest that conventional approaches based on the Wheeler and Willenborg residual stress models can provide reasonable estimates only by coincidence. They model the wrong parameter at lower fatigue crack growth rates and may simply not be valid at other growth rates.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2016
Subjects:
электронный ресурс
труды учёных ТПУ
near threshold fatigue
near-tip residual stress
crack closure
variable-amplitude loading
усталость
остаточные напряжения
трещины
закрытие
амплитуда
нагружение
Online Access:http://doi.org/10.1016/j.ijfatigue.2015.09.025
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=654066

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