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Modeling fatigue crack growth for a through thickness crack: An out-of-plane constraint-based approach considering thickness effect
- Source :
- International Journal of Mechanical Sciences. 178:105625
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Though several studies have tried to explain and model the effect of thickness on crack growth behavior, this remains a controversial topic. The present paper proposes an approach to model the fatigue crack growth with different thicknesses, which requires crack growth experimental data with different specimen thicknesses and out-of-plane constraint distribution relations for CT specimens. Empirical formula, for the distributions of two types of constraint factors Tz and T33, were fitted according to the FEA results. The stress state variation induced by the thickness was quantified using the formulas; then, the crack driving force was modified to establish the novel crack growth model. The predictions using this model largely agree with the experimental data. So, the newly developed model was verified. This paper proposes a new perspective on quantifying the effect of crack thickness, and provides an alternative to the traditional method of modeling the crack growth behavior.
- Subjects :
- Materials science
Mechanical Engineering
02 engineering and technology
Mechanics
Growth model
Paris' law
021001 nanoscience & nanotechnology
Condensed Matter Physics
Finite element method
Out of plane
Constraint (information theory)
Stress (mechanics)
020303 mechanical engineering & transports
Distribution (mathematics)
0203 mechanical engineering
Mechanics of Materials
Empirical formula
General Materials Science
0210 nano-technology
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 00207403
- Volume :
- 178
- Database :
- OpenAIRE
- Journal :
- International Journal of Mechanical Sciences
- Accession number :
- edsair.doi...........7c8e10edb6ac8ae1515cba1bb2ac8650