A computational multiscale approach towards the modelling of microstructures with material interfaces in electrical conductors

Motivated by the change of effective electrical properties grain or phase boundaries, a computational multiscale framework for continua with interfaces at the microscale is proposed. Cohesive-type interfaces are considered at the microscale, such that displacement and electrical potential jumps are accounted for. The governing equations for materials with interfaces under mechanical and electrical loads are provided. Based on these, a computational multiscale formulation is proposed. The coupling between the electrical and mechanical subproblem is established by the constitutive equations at the material interface. In order to investigate deformation-induced property changes at the microscale, the evolution of interface damage is elaborated. The proposed multiscale framework is further examined through various representative boundary value problems so as to identify its key properties.

Automated summary

Motivated by the change of effective electrical properties at grain or phase boundaries, this paper proposes a computational multiscale framework for studying interface effects in materials at the microscale. The framework considers cohesive-type interfaces, accounting for displacement and electrical potential jumps. Governing equations are provided for materials with interfaces under mechanical and electrical loads, and a computational multiscale formulation is proposed. The coupling between electrical and mechanical subproblems is established through constitutive equations at the material interface. The evolution of interface damage is studied to investigate deformation-induced property changes at the microscale. The proposed multiscale framework is further examined through various representative boundary value problems, identifying its key properties.