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Data Acquisition Protocol for Determining Embedded Sensitivity Functions

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Topology Optimization-Based Damage Identification Using Visualized Ultrasonic Wave Propagation.

Kazuki Ryuzono¹, Shigeki Yashiro¹, Hiroto Nagai¹

¹Department of Aeronautics and Astronautics, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.

Materials (Basel, Switzerland)

|December 22, 2019

Summary

This summary is machine-generated.

This study introduces a novel damage identification technique using topology optimization and ultrasonic waves. The method accurately quantifies structural damage by optimizing material properties in a model, validated through simulations and experiments.

Keywords:

damage identification non-destructive inspection topology optimization ultrasonic visualization ultrasonic wave propagation

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Area of Science:

Structural Health Monitoring
Non-Destructive Testing
Computational Mechanics

Background:

Visualized ultrasonic wave propagation aids damage detection but lacks quantitative accuracy.
Topology optimization is well-suited for inverse problems requiring quantitative results.
Accurate damage assessment is crucial for structural integrity and safety.

Purpose of the Study:

To develop a quantitative damage identification method combining topology optimization and ultrasonic wave propagation.
To estimate the damage state by optimizing material properties within a finite element model.
To validate the proposed method using numerical simulations and experimental data.

Main Methods:

A damage parameter, representing variations in Young's modulus, was used to model damage.
Topology optimization inversely reproduced ultrasonic wave propagation features (maximum amplitude map).
The method was applied to numerical models and an aluminum plate with an artificial crack.

Main Results:

The proposed method successfully estimated the actual damage state with high accuracy in numerical examples.
Sensitivity analysis of the objective function and penalization exponent for Young's modulus was performed.
Experimental results on an aluminum plate showed good agreement with numerical predictions, demonstrating feasibility.

Conclusions:

The combined approach of topology optimization and ultrasonic wave propagation provides a feasible and accurate method for quantitative damage identification.
The study highlights the effectiveness of optimizing material properties to represent and locate structural damage.
This technique offers a promising advancement in non-destructive evaluation for structural health monitoring.