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Mechanic-Electric-Thermal Directly Coupling Simulation Method of Lamb Wave under Temperature Effect.
Xiaofei Yang1, Zhaopeng Xue1, Hui Zheng1
1Research Center of Structural Health Monitoring and Prognosis, State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
This study simulates Lamb Wave (LW) propagation using piezoelectric transducers (PZTs) under varying temperatures. The simulation accurately predicts LW behavior, crucial for structural health monitoring in diverse environmental conditions.
Area of Science:
- Multiphysics simulation
- Structural Health Monitoring
- Acoustic Wave Propagation
Background:
- Lamb Wave (LW) based structural health monitoring (SHM) faces challenges in variable environments.
- Simulating LW propagation with piezoelectric transducers (PZTs) offers an efficient method for damage assessment.
Purpose of the Study:
- To propose and validate a multiphysics simulation method for LW propagation considering temperature effects.
- To investigate the influence of temperature on LW characteristics and PZT performance.
Main Methods:
- Developed a coupled mechanic-electric-thermal model in COMSOL Multiphysics.
- Simulated LW propagation under temperatures ranging from -20 °C to 60 °C.
- Validated simulation results against experimental measurements.
Main Results:
- The simulation accurately predicted the A0 and S0 Lamb Wave modes.
- Temperature significantly influences LW propagation: amplitude increases and phase velocity decreases with rising temperature.
- Simulation results showed good agreement with experimental data.
Conclusions:
- The proposed multiphysics simulation method effectively captures temperature effects on LW propagation.
- This approach enhances the reliability of LW-based SHM in varying environmental conditions.
- Accurate simulation is vital for robust damage assessment in real-world applications.
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