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Title: Extracting Non-propagating Oscillatory Fields in Concrete to Detect Distributed Cracking

Journal Article · · Journal of the Acoustical Society of America
DOI: https://doi.org/10.1121/1.5130568 · OSTI ID:1570391
 [1];  [2]
  1. Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Univ. of Illinois, Urbana-Champaign, IL (United States)
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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

Cited By (1)

Contactless Ultrasonic Wavefield Imaging to Visualize Near-Surface Damage in Concrete Elements journal July 2019

Figures / Tables (15)

FIG. 1(p. 7)figure FIG. 1
FIG. 2(p. 10)figure FIG. 2
FIG. 3(p. 12)figure FIG. 3
FIG. 4(p. 13)figure FIG. 4
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Table 1(p. 18)table Table 1
FIG. 6(p. 20)figure FIG. 6
FIG. 7(p. 21)figure FIG. 7
FIG. 8(p. 23)figure FIG. 8
FIG. 9(p. 24)figure FIG. 9
FIG. 10(p. 25)figure FIG. 10
FIG. 11(p. 28)figure FIG. 11
FIG. 12(p. 29)figure FIG. 12
FIG. 13(p. 30)figure FIG. 13
FIG. 14(p. 31)figure FIG. 14

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