On size and boundary effects in scaled model blasts—fractures and fragmentation patterns
| Autor: | H. P. Rossmanith, Koji Uenishi |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Shock wave
Materials science Explosive material Wave propagation Fissure business.industry Fracture mechanics Structural engineering Mechanics Geotechnical Engineering and Engineering Geology Physics::Geophysics Laboratory specimen medicine.anatomical_structure medicine Cylinder Boundary value problem business |
| Zdroj: | Fragblast. 10:163-211 |
| ISSN: | 1744-4977 1385-514X |
| Popis: | This contribution is the third part of a paper addressing size and boundary effects on explosively induced wave propagation, fracturing and fracture pattern development in small scale laboratory specimens, which are frequently used for model blast tests. Small cylindrical and block type specimens fabricated from concrete, sandstone and amphibolite are centre-line loaded by linear explosive charges and supersonically detonated. Using shock wave theory, elastic wave propagation theory, and fracture mechanics it is shown that the type of boundary conditions prescribed at the outer boundary of the cylinder controls the extension of stem cracking and the development of the fragmentation pattern within the body of the cylinder and the cube specimens. In the case of a composite specimen, where a cylindrical core of different material is embedded in a cylinder or in a cube, the level of fracturing and fragmentation is controlled by the conditions and possible de-lamination of the interface which, in turn, depends... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|