Journal article
Constraint effects on probabilistic analysis of cracks in ductile solids
Fatigue & fracture of engineering materials & structures, Vol.23(10), pp.879-890
2000
DOI: 10.1046/j.1460-2695.2000.00309.x
Abstract
This paper presents a method for evaluating constraint effects on probabilistic elastic–plastic analysis of cracks in ductile solids. It is based on fracture parameters J and Q, correlation between Q and J–resistance curve of the material, and J-tearing theory for predicting fracture initiation and instability in cracked structures. Based on experimental data from small-scale fracture specimens, correlation equations were developed for fracture toughness at crack initiation and the slope of the J–resistance curve as a function of constraint condition. The random parameters may involve crack geometry, tensile and fracture toughness properties of the material, and applied loads. Standard reliability methods were applied to predict probabilistic fracture response and reliability of cracked structures. The results suggest that crack-tip constraints have little effect on the probability of crack initiation. However, the probability of fracture instability can be significantly reduced when constraint effects are taken into account. Hence, for a structure where some amount of stable crack-growth can be tolerated, crack-tip constraints should be considered for probabilistic fracture-mechanics analysis.
Details
- Title: Subtitle
- Constraint effects on probabilistic analysis of cracks in ductile solids
- 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 States
- Resource Type
- Journal article
- Publication Details
- Fatigue & fracture of engineering materials & structures, Vol.23(10), pp.879-890
- DOI
- 10.1046/j.1460-2695.2000.00309.x
- ISSN
- 8756-758X
- eISSN
- 1460-2695
- Publisher
- Blackwell Science; Oxford
- Language
- English
- Date published
- 2000
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064570002771
Metrics
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