Journal article
Probabilistic analysis of off-center cracks in cylindrical structures
The International journal of pressure vessels and piping, Vol.77(1), pp.3-16
2000
DOI: 10.1016/S0308-0161(99)00076-9
Abstract
This paper presents a probabilistic methodology for fracture-mechanics analysis of off-center cracks in pipes subject to pure bending moment. It is based on: (1) a new analytical approximation of the J-integral; (2) statistical models of uncertainties in loads, material properties, and crack geometry; and (3) standard computational methods of structural reliability theory. The proposed analytical equations were applied to a probabilistic fracture-mechanics analysis of off-center cracks in pipes. The second-order reliability method was used to determine the probabilistic characteristics of the J-integral and failure probability based on the initiation of crack growth. Numerical examples are presented to illustrate the proposed methodology. The results show that the failure probability strongly depends on the off-center crack angle and is generally lower than that of a pipe with a symmetrically centered crack. Hence, simplifying an off-center crack by a symmetrically centered crack can produce significant conservatism in predicting failure probabilities. In addition, uncertainty in the off-center crack angle, if it exists, can increase the failure probability of pipes.
Details
- Title: Subtitle
- Probabilistic analysis of off-center cracks in cylindrical structures
- Creators
- S RAHMAN - Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242, United StatesG CHEN - Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242, United StatesR FIRMATURE - IBM Printing Systems Company, Boulder, CO 80301, United States
- Resource Type
- Journal article
- Publication Details
- The International journal of pressure vessels and piping, Vol.77(1), pp.3-16
- Publisher
- Elsevier; Oxford
- DOI
- 10.1016/S0308-0161(99)00076-9
- ISSN
- 0308-0161
- eISSN
- 1879-3541
- Language
- English
- Date published
- 2000
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064238002771
Metrics
5 Record Views