Digital Twin of Artifacts
In order to construct the Digital Twin of Artifacts, an inspection system is necessary to detect the current state of structural materials in real time. Specifically, the inspection system includes both a macroscale and microscale inspection technique, where the macroscale technique can detect degradation over an extensive area of structural materials, while the microscale technique is an intensive one for a narrower area where degradation has been progressed based on the macroscopic results.
We develop numerical models on each scale using the inspection and monitoring data that correspond to each scale of the models as input parameters, and we conduct multiscale analysis that integrates and couples these models concurrently in order to reproduce the current state of structural materials of the artifact system and to predict their degradation in virtual space. The digital twin is named after the virtual twin constructed in digital space by combining hardware that includes inspection and monitoring techniques, and software, namely numerical models, which faithfully reflects the information related to the integrity of the structural materials of the actual artifact system. (T. Okita, et al., Procedia CIRP 79 (2019) 667–672.)