Organizer(s) / Affiliation(s): D. J. Luscher, Los Alamos National Laboratory, H. M. Mourad, Los Alamos National Laboratory, C. A. Bronkhorst, Los Alamos National Laboratory
Email: djl@lanl.gov, hmourad@lanl.gov, cabronk@lanl.gov
Abstract: Ductile damage evolution is a process occurring over multiple evolving length scales. Modeling this behavior within conventional continuum frameworks frequently leads to apparent constitutive softening. Coincident with softening behavior is the often encountered superficial mesh dependence compromising predictive capability and causing numerical instability under certain conditions. Non-local continuum methods can alleviate superficial mesh dependence, but generally require specification of length scale parameters and are often computationally more expensive. Thus far, most work employing such models has focused on calibrating fixed length scale parameters for specific cases in order to obtain desirable solution results at a single scale. In the proposed symposium, we invite researchers to present their work towards linking relevant length scale parameters in higher scale nonlocal damage models to simulation results obtained from finer scales with the aim of improving the ability to predict the softening response of materials under general loading conditions.
