Multiscale analysis of periodic micropolar elastic media

In this work, laminated and fiber-reinforced elastic micropolar multiphase composites are analyzed. The aim is to evaluate the effective stiffness and torque properties, assuming isotropic centrosymmetric constituents and ideal interfacial bonding. From the asymptotic homogenization method (AHM), the corresponding formulations of the local cell problems and the effective properties are derived. The local problems are solved using the methodology reported for laminated and fibrous media in previous works. Herein, for the first time, a direct and systematic quantitative comparison between the effective properties of laminated and fibrous micropolar media is presented. In addition, an extensive parametric analysis is carried out for some real material systems (SyF, PUF, PMIF-WF51, PMIF-WF110), generating results useful for engineering applications, design, and model validation. Moreover, an integration of both microstructural architectures within a micropolar framework is shown, enabling a consistent comparison of how geometry influences the effective responses. Numerical results illustrate the findings for different two-phase composites. They reveal the influence of microstructural geometry on the effective behaviors, highlighting significant differences between laminated and fibrous composites. These findings could be useful for applications and offer a solid reference framework for validating both numerical and experimental studies. © 2026 Elsevier Ltd