Details
| Original language | English |
|---|---|
| Pages (from-to) | 3226-3242 |
| Number of pages | 17 |
| Journal | Engineering fracture mechanics |
| Volume | 78 |
| Issue number | 18 |
| Early online date | 19 Sept 2011 |
| Publication status | Published - Dec 2011 |
| Externally published | Yes |
Abstract
An analytical method to calculate the stress intensity factor for cracked steel I-beams under both bending moment and axial load is presented. The method is based on the approach of crack surface widening energy release rate. The crack surface widening energy release rate is formulated by a G*-integral and elementary strength theory of materials. Comparisons between the analytical results and results available in the literature for specific cases demonstrate the validity of the methodology. Furthermore, the fatigue and fracture behavior of the steel I-beam are experimentally investigated. The fatigue crack growth rate, residual deflection and stiffness reduction of a cracked beam under cyclic loading are studied. A three-dimensional digital image correlation system is used to illustrate the stress evolution pattern and the plasticity zone around the crack tip using image processing technique, thereby providing further verification of the theoretical models.
Keywords
- 3D digital image correlation system, Fatigue crack growth, Fracture mechanics, Steel I-beam, Stress intensity factor
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Engineering fracture mechanics, Vol. 78, No. 18, 12.2011, p. 3226-3242.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Analytical calculation of stress intensity factor of cracked steel I-beams with experimental analysis and 3D digital image correlation measurements
AU - Ghafoori, E.
AU - Motavalli, M.
PY - 2011/12
Y1 - 2011/12
N2 - An analytical method to calculate the stress intensity factor for cracked steel I-beams under both bending moment and axial load is presented. The method is based on the approach of crack surface widening energy release rate. The crack surface widening energy release rate is formulated by a G*-integral and elementary strength theory of materials. Comparisons between the analytical results and results available in the literature for specific cases demonstrate the validity of the methodology. Furthermore, the fatigue and fracture behavior of the steel I-beam are experimentally investigated. The fatigue crack growth rate, residual deflection and stiffness reduction of a cracked beam under cyclic loading are studied. A three-dimensional digital image correlation system is used to illustrate the stress evolution pattern and the plasticity zone around the crack tip using image processing technique, thereby providing further verification of the theoretical models.
AB - An analytical method to calculate the stress intensity factor for cracked steel I-beams under both bending moment and axial load is presented. The method is based on the approach of crack surface widening energy release rate. The crack surface widening energy release rate is formulated by a G*-integral and elementary strength theory of materials. Comparisons between the analytical results and results available in the literature for specific cases demonstrate the validity of the methodology. Furthermore, the fatigue and fracture behavior of the steel I-beam are experimentally investigated. The fatigue crack growth rate, residual deflection and stiffness reduction of a cracked beam under cyclic loading are studied. A three-dimensional digital image correlation system is used to illustrate the stress evolution pattern and the plasticity zone around the crack tip using image processing technique, thereby providing further verification of the theoretical models.
KW - 3D digital image correlation system
KW - Fatigue crack growth
KW - Fracture mechanics
KW - Steel I-beam
KW - Stress intensity factor
UR - http://www.scopus.com/inward/record.url?scp=81055155996&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2011.09.012
DO - 10.1016/j.engfracmech.2011.09.012
M3 - Article
AN - SCOPUS:81055155996
VL - 78
SP - 3226
EP - 3242
JO - Engineering fracture mechanics
JF - Engineering fracture mechanics
SN - 0013-7944
IS - 18
ER -