Particle Models

Damage simulation in heterogeneous materials

 The nonlinear behavior of heterogeneous materials, such as in concrete products or sand-lime bricks, is characterized mainly by the formation of microcracks within the structure of the material. Hence, these materials are of a multiscale nature: the behavior of a structural component is determined by processes within the material structure. This phenomenon provides the opportunity of using numerical simulations for analyzing the behavior of the material on various length scales.

On the macroscale, the key dimensions of the structural component define the characteristic dimension of the model. Since these dimensions are usually considerably larger than the dimensions of the individual material components, macroscale models largely neglect the heterogeneous nature of the material. Rather, the material is assumed to be homogeneous and isotropic.  In this approach, the corresponding properties of the material are characterized by effective parameters.  These models capture nonlinear material behavior mainly by complex nonlinear material laws that provide only a...

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