A Framework for Probabilistic Assessment of Fracture Mechanics Life (Preprint)
Abstract
This report was developed under a SBIR contract for topic AF103-157. The paper develops a framework for application of probabilistic methods to assess the variability in fracture mechanics life for components. The probability of failure for a component at a specific failure location is typically defined by a crack size exceeding a threshold crack size (e.g. as defined by repair or bore-scope inspection limits). The computation of the probability of failure in a predictive manner requires the ability to compute crack initiation and crack propagation life in a probabilistic manner. This paper describes the essential elements of a framework that enables the computation of probabilistic fracture mechanics life and exercises the ingredients of this framework on a benchmark problem with focus on crack growth model parameter variability. The demonstration on the benchmark problem provides insights into some of the issues that need to be considered towards the development of a rigorous probabilistic life assessment framework. Some of the practical challenges towards extending the results to complex industrial applications are highlighted as scope for future efforts.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2011
- Accession Number
- ADA553444
Entities
People
- Adrian Loghin
- Genghis Khan
- Srikanth Akkaram
Organizations
- GE Global Research