A Practical Method Based on Stress Evaluation (σd Criterion) to Predict Initiation of Crack Under Creep and Creep-Fatigue Conditions

[+] Author and Article Information
D. Moulin, B. Drubay, D. Acker, L. Laiarinandrasana

Commissariat à l’Energie Atomique DRN/DMT/SEMT, Cen Saclay 91191, Gif sur Yvette, France

J. Pressure Vessel Technol 117(4), 335-340 (Nov 01, 1995) (6 pages) doi:10.1115/1.2842132 History: Received December 01, 1991; Revised March 02, 1995; Online February 11, 2008


The behavior of defects like cracks in nuclear components operating at high temperature, where creep is significant, must be under control. There exists the need to have a practical method of analysis, which can be used by engineers, to calculate the time of initiation for defects existing at the start of life of nuclear components. This study presents the background, the development, the application, and results concerning validation work made for a simplified method named σd of prediction of initiation for nuclear structures made of 316L austenitic steel and operating at temperature where creep is significant. This method relies on the evaluation of real stress-strain history on a small distance d (d = 0.05 mm) close to the crack front and material characteristics (limiting stresses) that are available in nuclear codes like ASME Code cases or RCC-MR.

Copyright © 1995 by The American Society of Mechanical Engineers
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