On Mesh Bias of Local Damage Models for Concrete

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F04%3A01101761" target="_blank" >RIV/68407700:21110/04:01101761 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
On Mesh Bias of Local Damage Models for Concrete
Original language description
In the present comparative study, we investigate the influence of mesh bias on failure simulations performed with isotropic and anisotropic damage models. Several fracture tests with curved crack trajectories are simulated on different meshes. The isotropic damage model with a realistic biaxial strength envelope is highly sensitive to the mesh orientation, even for fine meshes. The sensitivity is reduced if the definition of equivalent strain is replaced by the modified von Mises definition, but the corresponding biaxial strength envelope is not realistic for concrete. The anisotropic damage model used in this study captures reasonably well arbitrary crack trajectories, while the biaxial strength envelope remains close to typical experimental data forconcrete. Finally, a crack tracking technique is combined with the isotropic damage model, and the mesh bias is demonstrated to be substantially reduced.
Czech name
O vlivu sítě na lokální modely poškození pro beton
Czech description
V této srovnávací studii zkoumáme vliv orientace sítě na simulace porušení prováděné pomocí izotropních a neizotropních modelů poškození. Několik testů lomové mechaniky se zakřivenými trhlinami je simulováno na různých sítích.

Publication year
2004
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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