Advanced Modeling and Simulation in Engineering Sciences

The use of experimental data in association with simulation models has become an active research topic. Indeed, new experimental facilities (such as digital image/volume correlation (DIC/DVC)) now enable to collect a large and diversified amount of data, and these may be used to identify and validate complex models, or to enhance predictions made by simulations tools. Furthermore, data and models are more and more intertwined to improve knowledge in applications dealing with structural health monitoring and control for instance, with potential real-time dialogue between simulators and connected physical systems (e.g., the DDDAS concept). However, many challenges dealing with data filtering, computational cost, or numerical robustness need to be addressed in order to incorporate data efficiently. 
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Unfitted Finite Element Methods (UFEM e.g. CutFEM, XFEM, Finite Cell FEM, CGFEM) have been extensively investigated over the last two decades. The use of computational meshes that do not need to conform to the geometrical features of boundary value problems is highly interesting to practitioners in many fields of computational sciences and engineering. However, UFEM are yet to be adopted as a standard analysis tool. This is due to a number of important theoretical, implementational and numerical challenges, which we wish to address in this special issue.
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Modeling and numerical simulation of interfaces in polycrystalline materials, or interphases in materials subjected to phase transformation, is a primary topic in predicting/optimizing the mechanical response to complex thermomechanical loading, either when the ratio of interface area vs. sample volume becomes very large, as in nanostructured materials or certain geophysical materials. In such conditions, interface-mediated plasticity may indeed become a prevalent deformation mechanism.
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