Heterogeneous materials present a mechanical response strongly dependent on the static andkinematic phenomena occurring in the constituents and at their joints. In order to analyze this kind ofmaterials it is a common practice to distinguish a macroscopic length scale of interest from a mesoscopic one,where the mesoscopic length scale is of the order of the typical dimensions of the constituents. At themesoscopic level the interaction between the units is simulated by mean of apposite mechanical devices.Among these devices is popular the zero thickness interface model where contact tractions and displacementdiscontinuities are the primary static and kinematic variables respectively. However, in heterogeneousmaterials the response also depends on joint internal stresses as much as on contact stresses. The introductionof internal stresses brings to the interphase model or an enhancement of the classical zero-thickness interface.With the term ‘interphase’ we shall mean a layer separated by two physical interfaces from the bulk materialor a multilayer structure with varying properties and several interfaces. Different failure conditions can beintroduced for the physical interfaces and for the joint material. The interphase model has been implementedin an open-source research-oriented finite element analysis program for 2D applications. Numericalsimulations are provided to show the main features of the model.
|Numero di pagine||10|
|Stato di pubblicazione||Published - 2013|
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology