Abstract
The mechanism of fracture propagation from the circular blast holes with two symmetrical cracks in rock blasting operations was investigated by the displacement discontinuity method. The stress intensity factors at the crack tips of the pre-existing cracks were numerically determined using the displacement variations near the crack tips. In this paper, the variation of the displacement discontinuities along pre-existing cracks emanating from blast holes are studied and compared using linear, quadratic, and cubic collocations. For the crack tip behavior, cubic collections are used, and also the special crack tip element is employed to reduce the singularity at the crack tips. The numerical results of the normalized stress intensity factor for linear, quadratic, and cubic collocations of the displacement discontinuities compared with the analytical results. These sets of results are compared with one another, and good agreements have been reached between them.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1209-1214 |
| Number of pages | 6 |
| Journal | Strength of Materials |
| Volume | 55 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 2023 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© Springer Science+Business Media, LLC, part of Springer Nature 2024.
Keywords
- blast holes
- displacement discontinuity method
- pre-existing symmetrical cracks