Modeling of integrated Lamb waves generation systems using a coupled finite element-normal modes expansion method

Area of Science:

• Smart Materials and Structures
• Non-destructive Testing
• Wave Propagation

Background:

• Self-monitoring materials are crucial for structural integrity.
• Lamb waves offer long-range propagation and flaw sensitivity for plate structures.
• Integrated piezoelectric transducers are key for Lamb wave generation and detection.

Purpose of the Study:

• To develop and test a modeling technique for integrated piezoelectric transducers in plate-shaped structures.
• To enable control over generated Lamb wave modes for effective structural health monitoring.
• To investigate the performance of multi-element transducers in composite materials.

Main Methods:

• A coupled finite element-normal modes expansion approach was employed for modeling.
• The model accommodates both bonded and embedded piezoelectric transducer configurations.
• Simulations focused on multi-element transducers integrated with composite materials.

Main Results:

• The study validated a modeling technique for Lamb wave-based structural health monitoring.
• Analysis revealed the influence of transducer dimensions, positions, and excitation delays.
• The model successfully simulated Lamb wave interactions with composite structures.

Conclusions:

• The developed modeling technique effectively simulates Lamb wave propagation for self-monitoring materials.
• Optimizing transducer parameters is essential for enhancing damage detection capabilities.
• This research advances the application of smart materials in structural health monitoring.