UNCERTAIN QUANTIF GUIDED WAVE STRUC HEALTH MONITOR AERONAU..

This book presents a guided wave-based structural health monitoring (GWSHM) system for aeronautical composite structures. Particular attention is paid to the development of a reliable and reproducible system with the capability to detect and localise barely visible impact damage (BVID) in carbon-fibre-reinforced polymer (CFRP) structures.

TThe authors introduce a novel sensor installation method that offers ease of application and replacement as well as excellent durability. Electromechanical Impedance (EMI) is also explored to assess the durability of the sensor installation methods in simulated aircraft operational conditions including thermal cycles, fatigue loading, and hot–wet conditions.

Damage characterisation using GWSHM is described and used to investigate damage in different CFRP structures. Key issues in guided wave-based damage identification are addressed, including wave mode and frequency selection, the influence of dynamic load, the validity of simulated damage, and the sensitivity of guided waves to impact damage in different CFRP materials.

The influence of temperature on guided wave propagation in anisotropic CFRP structures is described, and a novel baseline reconstruction approach for temperature compensation is presented. Finally, a multi-level hierarchical approach for the quantification of an ultrasonic GWSHM system is put forth.

Contents:

• Introduction
• Fundamentals of Guided-Wave-Based Damage Identification
• Installation Method for PZT Transducers in Composite Structures
• Guided-Wave-Based Damage Characterisation in Composite Structures
• Temperature Effect and Compensation for GWSHM
• Hierarchical Approach to Quantification of GWSHM
• Summary

Readership: Advanced undergraduate and graduate students, researchers and practitioners in the fields of aerospace engineering, structural health monitoring, and ultrasonics.

Key Features:

• This book presents new methods developed for the improvement of the reliability of Guided Wave Structural Health Monitoring (GWSGM) systems for aeronautical composites
• Book provides readers with an understanding of the challenges of the development of reliable GWSHM systems, as well as the methodologies developed for reliability improvement in the key aspects of GWSHM system design and application
• Particular attention is devoted to the detection and localisation of barely visible impact damage in Carbon-Fibre Reinforced Polymer structures