Abstract
The characteristics of the active plastic zone surrounding a crack growingin a single crystal (FCC, BCC, and HCP) at constant velocity is investigated for ModeI loading under plane strain assumptions. The framework builds upon a steady-state relation bringing the desired solution out in a frame translating with the crack tip. In the study, the shielding of the crack tip that follows from plastic slip is investigated by adopting the SSV-model. High resolution plots of the plastic zones are obtained and a detailed study confirms the existence of analytically determined velocity discontinuities from the literature. The plastic zone is found to be smallest for the FCC structure andlargest for the HCP structure, which is also reected in the shielding ratio, where FCC crystals show the smallest shielding and HCP the largest shielding.
Original language | English |
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Title of host publication | Proceedings of the 29th Nordic Seminar on Computational Mechanics (NSCM-29) |
Editors | R. Larsson |
Number of pages | 4 |
Publication date | 2016 |
Publication status | Published - 2016 |
Event | 29th Nordic Seminar on Computational Mechanics - Gothenburg, Sweden Duration: 26 Oct 2016 → 28 Oct 2016 |
Conference
Conference | 29th Nordic Seminar on Computational Mechanics |
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Country/Territory | Sweden |
City | Gothenburg |
Period | 26/10/2016 → 28/10/2016 |
Keywords
- Quasi-static crack growth
- Crystal plasticity
- Plastic zones
- Shielding ratio