Corrections in numerical methodology to evaluate plasticity induced crack closure along the thickness
| Autor: | D. Camas, A. Gonzalez-Herrera, J. Garcia-Manrique, Maria Eugenia Parron-Rubio |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Applied Mathematics Mechanical Engineering Effective stress Closure (topology) 02 engineering and technology Mechanics Plasticity 021001 nanoscience & nanotechnology Condensed Matter Physics Moment (mathematics) Crack closure 020303 mechanical engineering & transports 0203 mechanical engineering Node (physics) Fracture (geology) General Materials Science 0210 nano-technology Stress intensity factor |
| Zdroj: | Theoretical and Applied Fracture Mechanics. 97:215-223 |
| ISSN: | 0167-8442 |
| DOI: | 10.1016/j.tafmec.2018.08.004 |
| Popis: | The influence of the three-dimensional effects of the distribution of the stress intensity factor in the numerical calculation of plasticity-induced crack closure is analysed in this paper. The usual methodology assumes a constant distribution of K along the thickness to obtain the effective stress intensity factor of the crack. This assumption should not be transposed to models that intend to observe phenomena in the crack front vicinity, where 3-D effects are a key aspect in the results. Through numerical simulations of both fracture and fatigue of through thickness straight cracks (CT specimen in mode I), the local opening and closure moment of each crack node is obtained and compared with previous one. Corrections are proposed for numerical methodology to obtain Kop and Kcl distribution along the thickness. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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