On the location of crack closure and the threshold condition for fatigue crack growth

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(84)90408-3· OSTI ID:6269064

Zaiken, E; Ritchie, R O

These experiments on ingot aluminum alloys provide further confirmation that the development of a threshold for the growth of long fatigue cracks is primarily associated with a reduction in local crack driving force due to crack closure in the wake of the crack tip. Moreover, based on studies of the change in K /SUB c1/ during progressive removal of the wake at threshold levels, it appears that although such closure is fairly evenly distributed over most of the crack length, more than 40% of the closure is confined to the near-tip region.

• Research Organization: Department of Materials Science and Mineral Engineering University of California, Berkeley, California
• OSTI ID: 6269064
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 18:8; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
CLOSURES
COBALT ALLOYS
CRACK PROPAGATION
CRACKS
FATIGUE
FRACTOGRAPHY
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
MATERIALS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
STRESS INTENSITY FACTORS
TITANIUM ALLOYS
WASPALOY