Comparison of the Deformation Behavior of Digital Materials using Full-field Strain Analysis and Micromechanical Modeling

摘要

Existing digital materials over a wide modulus range were provided by the company for this study and included two types of compounds: an elastomer like matrix, filled with hard particles (Type 1) and a hard matrix, filled with elastomer particles (Type 2). The material data as input for the micromechanical simulation and the properties of the compounds for comparing to the results of the simulation were determined in tensile tests applying an additional full-field strain analysis device [1]. In the micromechanical simulations the homogenization technique of the Digimat MF Software module as well as finite element tools (Digimat FE & Abaqus) were applied. The simulations were first carried out in the elastic deformation regime under tensile conditions and the calculated Young's modulus and Poisson's ratio values were compared with the experimental data determined by full-field strain analysis. Furthermore, special emphasis was devoted to extend the simulations towards large strains by applying proper hyperlastic models and functions.