2022 Volume 63 Issue 3 Pages 200-205
Most frictional materials used in railways are made of composite material, and their macroscopic material properties are largely affected by their microscopic structure. It is useful to clarify the relationship between microscopic structure and material properties by numerical simulation for effective improvement or development of the materials. In this study, we developed an image-based microscopic model by using X-ray computed tomography for a metalized carbon pantograph contact strip material and evaluated its Young's modulus, thermal conductivity and electrical resistivity based on the homogenization method. The calculated material properties were more consistent with the experimentally measured values than the estimated values based on the classical Voigt model. We also introduce the analysis result of the stress, temperature and current density distribution in the microscopic model.
