Dr. Mousavi (Karlstad, Sweden) will present the work "Atomistic Simulation of Cracks versus Generalized Continua" we are doing in close collaboration with Prof. Korsunsky (Oxford, UK) at the 14th International Conference on Fracture (ICF14) which will be held in Rhodes (Greece) on June 18-23 2017.
Atomistic simulation of cracks versus generalized continua
Mahmoud Mousavi1, Julien Guénolé2, Polina Baranova2,Erik Bitzek2, Alexander M. Korsunsky3
1Department of Engineering and Physics, Karlstad University, 65188 Karlstad, Sweden
2Department of Materials Science and Engineering, Institute I, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany
3Multi-Beam Laboratory for Engineering Microscopy (MBLEM), Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom
Abstract: Classical fracture theory is formulated within classical continuum mechanics and possess singularities at the dislocation cores as well as crack tips. A number of generalized continuum theories successfully regularize the field quantities such as stress and/or strain. Nevertheless, these generalized theories should be selected carefully, in fact to improve our fracture theory towards realistic situations. Validation with experimental observations as well as numerical experiments can guide us through this selection. Atomistic simulation is capable of providing us details of the field quantities at the vicinity of crack tips. In this presentation, we compare quantities such as the stress field of a crack within nonlocal and gradient elasticity theories with results from atomistic simulations. Besides qualitative agreement, such comparisons can also provide tools to evaluate the internal length scale parameters of the generalized continua.
1 Corresponding author