Objectif Understanding how materials respond to external mechanical perturbation is a central problem of science and engineering. While for most practical purposes it is useful to idealize the mechanical response of a material as a deterministic function of the externally applied perturbation, disorder and fluctuations are unavoidable, leading to sample-to-sample variations and non-trivial size effects. The size dependence of strength is a well known but still unresolved issue in the fracture of materials and structures. The difficulty in addressing this problem stems from the complex interplay between microstructual heterogeneity and long-range elastic interactions. Furthermore, in micro and nanoscale samples, the plastic yield strength displays size effects and strain bursts, features that are not present in macroscopic samples where plasticity is a smooth process. Large fluctuations both in fracture processes and in microscale plasticity make the use of conventional continuum mechanics problematic and calls instead for a statistically based approach. These problems are becoming particularly important in the current miniaturization trend towards nanoscale devices, since the relative amplitude of fluctuations grows as the sample size is reduced. In this project, concepts and tools of statistical mechanics are used to address size effects and fluctuations in the irreversible deformation and failure of materials. The general objective is to provide a quantitative theory that can be used as base for setting reliable safety factors. The theory will be based on the renormalization group and will be guided and validated by large scale numerical simulations such as molecular dynamics, discrete dislocation dynamics and disordered network models. Finally, we will analyze experimental data present in the literature. Champ scientifique natural sciencesphysical sciencesclassical mechanicsstatistical mechanics Programme(s) FP7-IDEAS-ERC - Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Thème(s) ERC-AG-PE8 - ERC Advanced Grant - Products and process engineering Appel à propositions ERC-2011-ADG_20110209 Voir d’autres projets de cet appel Régime de financement ERC-AG - ERC Advanced Grant Institution d’accueil UNIVERSITA DEGLI STUDI DI MILANO Contribution de l’UE € 896 423,82 Adresse Via Festa Del Perdono 7 20122 Milano Italie Voir sur la carte Région Nord-Ovest Lombardia Milano Type d’activité Higher or Secondary Education Establishments Contact administratif Fortunato Laface (Dr.) Chercheur principal Stefano Zapperi (Prof.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée Bénéficiaires (3) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire UNIVERSITA DEGLI STUDI DI MILANO Italie Contribution de l’UE € 896 423,82 Adresse Via Festa Del Perdono 7 20122 Milano Voir sur la carte Région Nord-Ovest Lombardia Milano Type d’activité Higher or Secondary Education Establishments Contact administratif Fortunato Laface (Dr.) Chercheur principal Stefano Zapperi (Prof.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée ISTITUTO PER L'INTERSCAMBIO SCIENTIFICO Italie Contribution de l’UE € 739 170,45 Adresse VIA CHISOLA 5 10126 Torino Voir sur la carte Région Nord-Ovest Piemonte Torino Type d’activité Research Organisations Contact administratif Roberto Palermo (Dr.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée CONSIGLIO NAZIONALE DELLE RICERCHE Italie Contribution de l’UE € 864 405,73 Adresse PIAZZALE ALDO MORO 7 00185 Roma Voir sur la carte Région Centro (IT) Lazio Roma Type d’activité Research Organisations Contact administratif Tiziana Collodel (Dr.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée