Extracting Non-propagating Oscillatory Fields in Concrete to Detect Distributed Cracking
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Univ. of Illinois, Urbana-Champaign, IL (United States)
We introduce work to find and locate distributed subsurface cracks in concrete by extracting non-propagating oscillatory fields. The medium of interest is concrete, but the approach also applies to other types of inhomogeneous media. The theoretical basis of the work is first presented through a one-dimensional point-scatterer model that considers the wavefield set up by multiple distinct scatterers. More complex scattering scenarios are then investigated using numerical simulation. The numerical models consider two types of scatterers: elliptic large-scale particles distributed throughout a medium and small-sized cracks localized within a damage zone. The theoretical and numerical analyses show that forward propagating waves undergo distinct scattering behavior within the crack damaged zone: non-propagating resonance-like oscillatory fields are set up within the cracked zone that are distinct from the scatter caused by the large-scale particles. We employ frequency-wavenumber (f-k) domain analysis to extract the energy of non-propagating oscillatory fields and thus to detect and locate zones of distributed cracking. The proposed approach is evaluated using numerical simulation and experimental data collected from concrete specimens that contain simulated distributed cracks. The results reflect the location of distributed crack zones in discrete random media such as concrete can be successfully detected.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States); Pennsylvania State Univ., University Park, PA (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE); USDOE
- Grant/Contract Number:
- NE0008266
- OSTI ID:
- 1570391
- Alternate ID(s):
- OSTI ID: 1571690
- Journal Information:
- Journal of the Acoustical Society of America, Vol. 146, Issue 4; ISSN 0001-4966
- Publisher:
- Acoustical Society of AmericaCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Contactless Ultrasonic Wavefield Imaging to Visualize Near-Surface Damage in Concrete Elements
|
journal | July 2019 |
Similar Records
In situ detection and characterization of alkali-silica reaction damage in concrete using contactless ultrasonic wavefield imaging
Final Scientific/Technical Report, Multi-Sensor Inspection and Robotic Systems for Dry Storage Casks