Stress Intensity Factors for Cracks Emanating from a Notch under Shear-Mode Loading
| Autor: | Jaroslav Pokluda, Pavel Šandera, Stanislav Žák, Jana Horníková |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
020303 mechanical engineering & transports
Materials science 0203 mechanical engineering Mechanics of Materials Mechanical Engineering Shear mode Crack size General Materials Science 02 engineering and technology Composite material 021001 nanoscience & nanotechnology 0210 nano-technology Stress intensity factor |
| Zdroj: | Key Engineering Materials. 774:48-53 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.774.48 |
| Popis: | The influence of the notch geometry on the stress intensity factor at the front of the emanating cracks is well known for the opening loading mode. The critical length of the crack corresponding to a vanishing of the influence of the notch stress concentration can be approximately expressed by the formula aI,c = 0.5ρ(d/ρ)1/3, where d and ρ are the depth and radius of the notch, respectively. The aim of the paper was to find out if this formula could be, at least nearly, applicable also to the case of shear mode loading. The related numerical calculations for mode II and III loading were performed using the ANSYS code for various combinations of notch depths and crack lengths in a cylindrical specimen with a circumferential U-notch. The results revealed that, for mode II loading, the critical length was much higher than that predicted by the formula for mode I loading. On the other hand, the critical lengths for mode I and mode III were found to be nearly equal. |
| Databáze: | OpenAIRE |
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