Determination of Stress Intensities of Through-Cracks in a Plate Structure Under Uncertain Boundary Conditions by Means of Strain Gages

H Kitagawa; H Ishikawa

doi:10.1520/STP35543S

SYMPOSIA PAPER Published: 01 January 1977

STP35543S

Determination of Stress Intensities of Through-Cracks in a Plate Structure Under Uncertain Boundary Conditions by Means of Strain Gages

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It is often required to determine the values of the stress-intensity factors at a tip of a given two-dimensional through-crack even when some of the boundary conditions are not exactly given.

A new method is proposed for determination of this kind of stress-intensity factor by combining experimental stress-analysis techniques, fracture mechanics, and variational methods.

In this paper, the stresses on the boundary of a small domain surrounding a crack tip were measured by electric resistance strain gages, and the stress-intensity factors were calculated by variational method. Sufficient accuracy was obtained. For convenience of applications, a method by means of a calculating table was proposed.

Author Information

Kitagawa, H

Tokyo University, Tokyo, Japan

Ishikawa, H

Tokyo University, Tokyo, Japan

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Developed by Committee: E08

Pages: 232–244

DOI: 10.1520/STP35543S

ISBN-EB: 978-0-8031-4703-4

ISBN-13: 978-0-8031-0356-6

Determination of Stress Intensities of Through-Cracks in a Plate Structure Under Uncertain Boundary Conditions by Means of Strain Gages

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