(left) Visualized wave propagation in a cracked Al plate
(right) Damage identification result
Quantitative evaluation of damage and/or defects is essential for the safety of transport vehicles and social infrastructures. Moving diagrams of ultrasonic wave propagation aids in finding scattered waves due to damage, but acquiring quantitative information about the damage is still a challenging task. We propose a new damage identification method based on topology optimization, combined with visualized ultrasonic wave propagation. In this approach, the damage state is represented by distribution of a damage parameter in a finite-element model. The ultrasonic wave propagation is inversely reproduced in the model by optimizing the distribution of the damage parameter, based on the mathematical programming. We aim to identify an internal crack in a metal plate and delamination in a composite laminate by establishing the proposed method.
Related publications
- Kazuki Ryuzono, Shigeki Yashiro, Hiroto Nagai, Nobuyuki Toyama. Topology optimization-based damage identification using visualized ultrasonic wave propagation. Materials, Vol. 13(1), 33 (2020).