Journal article
Probabilistic fracture mechanics: J-estimation and finite element methods
Engineering fracture mechanics, Vol.68(1), pp.107-125
2001
DOI: 10.1016/S0013-7944(00)00092-8
Abstract
The objective of this study was to evaluate the adequacy of current
J-estimation models commonly used in probabilistic elastic–plastic analysis of ductile cracked structures. A newly developed probabilistic model based on elastic–plastic finite element method was used to evaluate the
J-estimation model. In both models, the analyses involve elastic–plastic fracture mechanics for underlying deterministic calculations, statistical representation of uncertainties in loads, crack size, and material properties involving both tensile and fracture toughness characteristics, and standard computational methods of structural reliability theory. Numerical examples are presented for two- and three-dimensional cracked structures. The results show that the probabilistic analysis based on
J-estimation model provides accurate estimates of failure probability when compared with those predicted by generally more accurate finite element model. The uncertainty in the crack size, if exists, can have a significant effect on the probability of failure, particularly when the crack size has a large coefficient of variation. A finite element-based probabilistic fracture-mechanics model is useful in benchmarking approximate results of
J-estimation analysis.
Details
- Title: Subtitle
- Probabilistic fracture mechanics: J-estimation and finite element methods
- Creators
- Sharif Rahman - Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242, USA
- Resource Type
- Journal article
- Publication Details
- Engineering fracture mechanics, Vol.68(1), pp.107-125
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/S0013-7944(00)00092-8
- ISSN
- 0013-7944
- eISSN
- 1873-7315
- Language
- English
- Date published
- 2001
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064219502771
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