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Performance Assessment for a Guided Wave-Based SHM System Applied to a Stiffened Composite Structure.

Inka Mueller¹, Vittorio Memmolo², Kilian Tschöke³

¹Institute for Mechanics, Bochum University of Applied Sciences, Am Hochschulcampus 1, 44801 Bochum, Germany.

Sensors (Basel, Switzerland)

|October 14, 2022

Summary

This study analyzes guided wave-based structural health monitoring (SHM) systems, revealing that damage distance significantly impacts performance, while propagation direction is less critical. Novel solutions are needed for environmental and structural dependencies in SHM.

Keywords:

guided ultrasounic waves path-based analysis probability of detection (POD)reliability assessment structural health monitoring (SHM)

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Area of Science:

Structural Health Monitoring (SHM)
Non-Destructive Evaluation
Wave Mechanics

Background:

Assessing structural health monitoring (SHM) systems requires considering numerous factors.
Guided wave-based SHM systems necessitate analysis of their structure and system parameters for performance evaluation.

Purpose of the Study:

To analyze prerequisites and contributing factors for guided wave-based SHM systems.
To display interdependencies of performance assessment using an SHM pyramid.
To present a detailed method for path-based performance assessment using open-access data.

Main Methods:

Analysis of SHM system structure and parameters.
Development of an SHM pyramid to illustrate performance interdependencies.
Path-based performance assessment using the Open Guided Waves dataset.
Numerical investigation of wave mechanics and sensor positioning.

Main Results:

Damage distance directly affects SHM system performance.
Propagation direction does not significantly alter detection capability in composite materials.
Reflections in finite waveguides necessitate analysis of entire wave paths.
Sensor position is a critical factor influencing SHM system performance.

Conclusions:

Environmental conditions, location, and structural dependency require novel solutions for SHM.
The decision framework and reliability thresholds are crucial for SHM system performance.
Understanding wave mechanics and sensor placement is essential for effective SHM.