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EnglishA model of a shear band as a zero-thickness non-linear interface is proposed and tested using finite element simulations. An imperfection approach is used in this model where a shear band that is assumed to lie in a ductile matrix material (obeying von Mises plasticity with linear hardening), is present from the beginning of loading and is considered to be a zone in which yielding occurs before the rest of the matrix. This approach is contrasted with a perturbative approach, developed for a J2-deformation theory material, in which the shear band is modeled to emerge at a certain stage of a uniform deformation. Both approaches concur in showing that the shear bands (differently from cracks) propagate rectilinearly under shear loading and that a strong stress concentration should be expected to be present at the tip of the shear band, two key features in the understanding of failure mechanisms of ductile materials.
Strain Localization and Shear Band Propagation in Ductile Materials / Bordignon, Nicola; Piccolroaz, Andrea; Dal Corso, Francesco; Bigoni, Davide. - In: FRONTIERS IN MATERIALS. - ISSN 2296-8016. - STAMPA. - 2015:2(2015), pp. 1-13.
| Titolo: | Strain Localization and Shear Band Propagation in Ductile Materials | |
| Autori: | Bordignon, Nicola; Piccolroaz, Andrea; Dal Corso, Francesco; Bigoni, Davide | |
| Autori Unitn: | ||
| Titolo del periodico: | FRONTIERS IN MATERIALS | |
| Anno di pubblicazione: | 2015 | |
| Numero e parte del fascicolo: | 2 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.3389/fmats.2015.00022 | |
| Handle: | http://hdl.handle.net/11572/116476 | |
| Citazione: | Strain Localization and Shear Band Propagation in Ductile Materials / Bordignon, Nicola; Piccolroaz, Andrea; Dal Corso, Francesco; Bigoni, Davide. - In: FRONTIERS IN MATERIALS. - ISSN 2296-8016. - STAMPA. - 2015:2(2015), pp. 1-13. | |
| Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| fmats-02-00022.pdf | Versione editoriale (Publisher’s layout) |  | Open Access Visualizza/Apri |
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