Statistics of Crack Growth in Engine Materials. Volume II. Spectrum Loading and Advanced Techniques

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Report Number: AFWAL TR 82-4040 Volume 2
Author(s): Schwartz, B. J., Salivar, G. C., Young, J. N., Annis, C. G., Jr.
Corporate Author(s): Materials Laboratory
Laboratory: Materials Laboratory
Date of Publication: 1984-02-01
Pages: 101
Contract: F33615-80-C-5189
DoD Project: 2420
DoD Task: 242001
Identifier: ADA140920

Abstract:
A method is developed capable of incorporating the scatter observed in crack growth data into component residual life analyses, such as used in damage-tolerant and retirement-for-cause concepts. Two fracture mechanics-based statistical models for fatigue crack growth damage accumulation in engine materials are proposed. These are based on synergistic fracture mechanics models: a hyperbolic sine crack growth rate function and a linear crack growth rate function of the Paris type.

Provenance: IIT

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