Measurements of CTOD and CTOA Around Surface-Crack Perimeters and Relationships Between Elastic and Elastic-Plastic CTOD Values

WG Reuter; WR Lloyd

doi:10.1520/STP23433S

SYMPOSIA PAPER Published: 01 January 1990

STP23433S

Measurements of CTOD and CTOA Around Surface-Crack Perimeters and Relationships Between Elastic and Elastic-Plastic CTOD Values

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A difficulty associated with predicting structural integrity is that the surface cracks found in structural components are three-dimensional whereas the crack-tip opening displacement (CTOD) and J-integral analytical techniques were derived from two-dimensional theory. This paper provides data from specimens containing surface cracks (aspect ratio either 0.1 or 0.5 and crack depth-to-thickness ratio 0.6); presents measured values of CTOD, crack-tip opening angle (CTOA), and Δa; provides experimental results relative to the center of rotation and the use of the Newman-Raju solutions for predicting the variation in CTOD around the crack perimeter; and evaluates possible correlations between CTOD, CTOA, and Δa.

Author Information

Reuter, WG

Idaho National Engineering Laboratory, EG&G Idaho, Inc., Idaho Falls, ID

Lloyd, WR

Idaho National Engineering Laboratory, EG&G Idaho, Inc., Idaho Falls, ID

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Details

Developed by Committee: E08

Pages: 152–176

DOI: 10.1520/STP23433S

ISBN-EB: 978-0-8031-5121-5

ISBN-13: 978-0-8031-1284-1

Measurements of CTOD and CTOA Around Surface-Crack Perimeters and Relationships Between Elastic and Elastic-Plastic CTOD Values

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