Nonincremental Evaluation of Modified Curve

N Ohtsuka

doi:10.1520/STP16852S

SYMPOSIA PAPER Published: 01 January 1991

STP16852S

Nonincremental Evaluation of Modified Curve

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A method to calculate the deformation theory J, J_D, which takes into account the influence of crack growth on J, and a modified version of the J-integral, J_M, to allow a large relaxation of restrictions on the amount of crack extension and specimen configuration were proposed by Ernst et al. In this work, simple and nonincremental formulas for J_D, J_D, and crack extension, based on the single-specimen key-curve method using blunt U-notched specimens are proposed. The methods are applied to the determination of J-R curve for three-point bend type and compact tension type specimens. The accuracy of the methods in the determination of the J-R curves is discussed, emphasizing the differences between J-R curves for J_D and J_M.

Author Information

Ohtsuka, N

Faculty of Science and Technology, Ryukoku University, Oe-cho Seta, Ohtsu, Japan

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Details

Developed by Committee: E08

Pages: 150–162

DOI: 10.1520/STP16852S

ISBN-EB: 978-0-8031-5172-7

ISBN-13: 978-0-8031-1418-0

Nonincremental Evaluation of Modified Curve

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