Application of Probabilistic Approach for Crack Growth Damage Accumulation in Metallic Structures

by J. N. Yang, George Washington Univ, United States,
S. D. Manning, George Washington Univ, United States,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability


Two stochastic crack growth approaches (i.e., 'general' and 'analytical') are presented and evaluated for predicting the crack growth damage accumulation in metallic structures. These approaches are well suited for ensuring U.S. Air Force damage tolerance and/or durability requirements and user tradeoff options in terms of risk. The general approach uses a numerically defined deterministic service crack growth curve directly. Whereas, the analytical approach approximates the service crack growth curve with one or more compatible crack growth segments. Analytical predictions for both approaches are correlated with experimental test results. Good correlations are obtained for a wide range of crack sizes.

Subject Headings: Probability | Cracking | Damage (structural) | Structural reliability | Structural analysis | Stochastic processes | Risk management | Numerical methods

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