Roberts, Ron

Ultrasound Nondestructive Evaluation

Ron Roberts

Senior Scientist
Adjunct Associate Professor
rroberts@iastate.edu
(515) 294-9743

Computational Simulation of Ultrasound Measurements

Analytical methods for elastic wave field propagation and scattering
- Short-wavelength asymptotic analysis
Boundary integral formulation: computational Boundary Element Method (BEM)
Volume integral formulation: computational Volume Element Method (VEM)

Ultrasound Interaction with Complex Microstructure

Volume integral formulation and VEM for propagation and scattering in:
- Single-phase crystalline metal microstructures
- Multi-constituent microstructures (multi-phase metals, CMCs)

Ultrasound Propagation and Scattering in Composite Materials

Ultrasound transmission in curved anisotropic laminates
Ultrasound scatter and attenuation in laminate microstructures

Multi-Mode Dispersion Compensated Guided Wave Inspection

High-frequency guided wave inspection of structures
Data collection and processing for the removal of multi-mode dispersion effects

Keywords

Ultrasound NDE, Ultrasound simulation, Microstructure, Composites, Guided Waves

Recognitions, Awards & Patents

Patent No. 4987412 – “Method and Apparatus for the Simultaneous Display and Correlation of Independently Generated Images”
Patent No. 6138512 – “Method and Apparatus for Determining Source Location of Energy Carried in Form of Propagation Waves through a Conduction Medium”
Patent No. 6601451 – “System and Method to Provide Material Property Measurement Using Re-Entrant Ultrasound”
Patent No. 7739899 – “Leak Detection Using Structure-Born Noise”

Funded Research Sponsors

AFRL, NASA
Pratt and Whitney, Honeywell, Rolls-Royce, Boeing

Ron Roberts research