Neper-Mosaic: Seamless generation of periodic representative volume elements on unit domains

Abstract

The effective macroscopic behaviour of a material is a manifestation of the underlying microstructure and microscale processes. This renders the generation of highly accurate digital microstructure twins indispensable for multiscale simulations. Mosaic is a Python-based, open-source software tool designed to address the challenge of incorporating non-planar, periodic microstructures generated by the software Neper into simulations that require periodic boundary conditions. Mosaic transforms these complex microstructures into rectilinear periodic equivalents and, additionally, makes it possible to account for material interfaces such as grain and phase boundaries. This transformation enables continuous integration with various simulation tools and workflows, facilitating accurate and efficient simulations of the effective material response.