Extended FEM modeling of crack paths near inclusions
Publication: Research - peer-review › Journal article – Annual report year: 2011
The extended FEM is applied to model crack growth near inclusions. A procedure to handle different propagation
rates at different crack tips is presented. The examples considered investigate uniform tension as well
as equibiaxial tension under plane strain conditions. A parameter study analyzes the effects on the crack path
when changing the relative stiffness between inclusion and matrix material, the relative distance between initial
crack and inclusion, and the size of the inclusion. Both edge cracks and internal cracks are studied. An
example with an internal crack near an inclusion is presented, where both crack tips propagate at different
growth rates until one crack tip eventually stops growing, as the related energy release rate drops below the
critical value. In another example, only one crack tip propagates initially, but eventually, the energy release
rate of the second crack tip becomes critical, and both crack tips propagate. Finally, an example of two cracks
near an inclusion is presented in which up to four crack tips propagate simultaneously.
| Original language | English |
|---|---|
| Journal | International Journal for Numerical Methods in Engineering |
| Publication date | 2012 |
| Volume | 89 |
| Pages | 786-804 |
| ISSN | 0029-5981 |
| DOIs | |
| State | Published |
| Citations | Web of Science® Times Cited: 0 |
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Keywords
- Individual crack increments, Crack growth, Inclusions, LEFM, X-FEM
ID: 6543835