Lamb-Wave Based Structural Health Monitoring in Polymer Composites

The book focuses especially on the application of SHM technology to thin walled structural systems made from carbon fiber reinforced plastics. Here, guided elastic waves (Lamb-waves) show an excellent sensitivity to structural damages so that they are in the center of this book. It is divided into 4 sections dealing with analytical, numerical and experimental fundamentals, and subsequently with Lamb-wave propagation in fiber reinforced composites, SHM-systems and signal processing.

The book is designed for engineering students as well as for researchers in the field of structural health monitoring and for users of this technology.

Motivation.- Objectives.- Wave Propagation in Elastic Solids – An Analytical Approach.- Fundamental Principles of the Finite Element Method.- Experimental Methods.- Higher Order Finite Element Methods.- Hybrid Simulation Methods—Combining Finite Element and Analytical Methods.- Damping Boundary Conditions for a Reduced Solution Domain Size and Effective Numerical Analysis of Heterogeneous Waveguides.- The Finite Cell Method - A Higher Order Fictitious Domain Approach for Wave Propagation Analysis in Heterogeneous Structures.- A Minimal Model for Fast Approximation of Lamb Wave Propagation in Complex Aircraft Parts.- Continuous Mode Conversion in Experimental Observations.- Material Modeling of Polymer Composites for Numerical Investigations of Continuous Mode Conversion.- Localization of Damaging Events and Damage in Anisotropic Plates by Migration Technique.- Time-of-Flight Calculation in Complex Structures.- The Determination of Dispersion Curves from Measurements by the Matrix Pencil Method.- Damage Identification by Dynamic Load Monitoring.- Mode Selective Actuator-Sensor-Systems.- Virtual Sensors for SHM.- Lamb Wave Generation, Propagation and Interactions in CFRP Plates.- Structural Health Monitoring on the SARISTU Full Scale Door Surround Structure.