Assessment for Decrease in Threshold Stress Intensity Factor (SIF) Range Due to High Maximum SIF

T Meshii; K Ishihara; K Watanabe

doi:10.1520/STP11491S

SYMPOSIA PAPER Published: 01 January 2005

STP11491S

Assessment for Decrease in Threshold Stress Intensity Factor (SIF) Range Due to High Maximum SIF

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In this paper, we consider the decrease in threshold stress intensity factor (SIF) range ▵K_th due to high maximum SIF K, which is observed for several materials in the tests with the K_max constant method when closure-free conditions are realized. We proposed an assessment criterion to predict this phenomenon from the past data for Al and Ti and showed that the criterion is valid also for steels. Finally, we proposed a simplified model to explain the phenomenon, considering the fact that marks of static fracture are observed on the fracture surface.

Author Information

Meshii, T

University of Fukui, Fukui, Japan

Ishihara, K

Graduate School of Engineering, University of Fukui, Fukui, Japan

Watanabe, K

Institute of Industrial Science, University of Tokyo, Tokyo, Japan

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Details

Developed by Committee: E08

Pages: 138–150

DOI: 10.1520/STP11491S

ISBN-EB: 978-0-8031-5505-3

ISBN-13: 978-0-8031-2410-3

Assessment for Decrease in Threshold Stress Intensity Factor (SIF) Range Due to High Maximum SIF

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