Abstract
New techniques to directly evaluate the plastic singularity of elasto-plastic crack under a mixed mode from the plastic J field, as well as indirectly from an elastic K field, have been suggested using Mechano-luminescence (ML) in SrAl2O4:Eu,Dy. For this purpose, the ML of a plastic core, Hutchinson–Rice–Rosenberg (HRR), field in the vicinity of a physical crack tip during four-point shearing was visualized and analyzed. Plastic stress intensity factors (SIFs) of KMP measured at 829 and 872 N directly from the ML-HRR field showed proper agreement with those of KMPe that were predicted indirectly from elastic SIFs with deviations of less than 11%. An imaginary crack tip within the plastic zone and a propagating angle with the plastic zone size under transient cracking were evaluated separately to verify use of ML technique for considering elasto-plastic crack in Structural Health Monitoring (SHM).
Original language | English |
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Pages (from-to) | 127-142 |
Number of pages | 16 |
Journal | International Journal of Engineering Science |
Volume | 123 |
DOIs | |
State | Published - Feb 2018 |
Keywords
- Elasto-plastic crack
- HRR field
- Mechano-luminescence
- Mixed mode
- Structural health monitoring