Ultrasonic Nondestructive Evaluation (NDE)
Guided Wave Propagation Modeling and Simulation
- Analytical formulations of wave-propagation solutions
- Finite element simulations of guided wave active sensing in elastic waveguides (e.g., plates, pipelines, rails, etc.)
Ultrasound Damage Imaging
- Baseline-free damage detection techniques, e.g., time reversal methods
- Transducer phased array design for metallic and composite structures
Nonlinear Ultrasonic Techniques
- High sensitivity to microscale damages
- Nonlinear resonance ultrasound spectroscopy for fatigue crack quantification
- Subharmonics, DC responses, second and higher harmonic generation, and wave mixing
Machine Learning Assisted Damage Characterization
- Simulation-trained neural network for automatic damage evaluation (e.g., location, size, orientation, etc.)
- Experimentally measured signals as test data for actual delamination prediction
Guided Wave Modeling and Simulation Phased Array Damage Imaging
Nonlinear Ultrasonics for Crack Quantification DL Assisted Automatic Damage Assessment
Junzhen Wang
Research Scientist II
Email: junzhenw@iastate.edu
Expertise
- Guided Waves
- Nonlinear Ultrasonics
- Phased Array UT
- Modeling and Simulation
- Piezoelectric Materials
Keywords
- Ultrasound NDE, Wave Propagation, Smart Materials and Structures, Structural Health Monitoring, Machine Learning (ML)/Deep Learning (DL)
Awards
- ICSHMIM Best Paper Award
- IMECE Second Place Student Paper Competition