Abstract
Concrete cracking under high frequency impact loads is modeled using a multi-scale approach. The macro-crack is modeled as a strong discontinuity using XFEM and a gradient-enhanced damage model is used to model diffuse damage at the meso-scale. A standard computational homogenization method is used to obtain the constitutive law for the bulk material and a continuous-discontinuous computational homogenization scheme which is based on a failure zone averaging technique is used to obtain a cohesive law for the macro-crack. In the multi-scale model, at the macro-scale a dynamic analysis is performed and the meso-scale model is solved as a static problem. The inertia forces at the meso-scale model are taken into account via a so-called dispersion tensor which depends on the heterogeneity of the meso-scale model. The meso-scale inertia forces appear as additional body forces in the macro-scale model and cause dispersion of the propagating wave. The proposed dispersive multi-scale scheme is verified by comparing the multi-scale results with a direct numerical simulation. The objectivity of the scheme with respect to the representative volume element size is demonstrated.
Original language | English |
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Title of host publication | Computational Modelling of Concrete Structures |
Subtitle of host publication | Proceedings of EURO-C 2014. St. Anton am Arlberg, Austria; 24-27 March 2014 |
Editors | Nenad Bićanić, Herbert Mang, Günther Meschke, René de Borst |
Place of Publication | Boca Raton FL USA |
Publisher | CRC Press |
Pages | 189-197 |
Number of pages | 9 |
Volume | 1 |
ISBN (Electronic) | 9781315762036 |
ISBN (Print) | 9781138026414 |
Publication status | Published - 2014 |
Externally published | Yes |
Event | EURO-C Conference 2014 - St. Anton am Arlberg, Austria Duration: 24 Mar 2014 → 27 Mar 2014 |
Conference
Conference | EURO-C Conference 2014 |
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Country/Territory | Austria |
City | St. Anton am Arlberg |
Period | 24/03/14 → 27/03/14 |