Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Frank J. Margetan"'
Advances in model-based software for simulating ultrasonic immersion inspections of metal components
Publikováno v:
AIP Conference Proceedings.
Under the sponsorship of the National Science Foundation’s Industry/University Cooperative Research Center at ISU, an effort was initiated in 2015 to repackage existing research-grade software into user-friendly tools for the rapid estimation of si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6858fd8b6a1af80e1a6a23fc405dddb0
https://doi.org/10.1063/1.5031671
https://doi.org/10.1063/1.5031671
Publikováno v:
AIP Conference Proceedings.
Two new studies are summarized in this paper. In the first, we compare recent GPR measurements on the same bridge to those obtained in 2012. The newer measurements use both the 1.6 GHz antenna used in the earlier work and an alternative higher freque
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5741a676e432de208b69d1f7386dda07
https://doi.org/10.1063/1.5031532
https://doi.org/10.1063/1.5031532
Autor:
Matthew McKillip, Daniel J. Barnard, Chien-Ping Chiou, Brady J. Engle, Ronald A. Roberts, Frank J. Margetan, Jared L. Taylor
Publikováno v:
AIP Conference Proceedings.
Under the sponsorship of the National Science Foundation’s Industry/University Cooperative Research Center at Iowa State University, an effort was initiated in 2015 to repackage existing research-grade software into user friendly tools for the rapi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e352b37fae5187b452c47287693c31a1
https://doi.org/10.1063/1.4974732
https://doi.org/10.1063/1.4974732
Autor:
Shelby Ellis, Jern Yang Tan, Tongge Huang, Chien-Ping Chiou, Frank J. Margetan, David J. Eisenmann
Publikováno v:
AIP Conference Proceedings.
Past experimental work on a highway bridge in central Iowa suggested that ground penetrating radar (GPR) signals could possibly be used to differentiate intact rebar from those having substantial metal loss due to corrosion. That study made use of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edfe822a586853c8ffddf39ddf3e7792
https://doi.org/10.1063/1.4974630
https://doi.org/10.1063/1.4974630
Publikováno v:
AIP Conference Proceedings.
Backscattered ultrasonic microstructural noise can be used to estimate grain size in metals. However for normal-incidence immersion measurements the ring-down of the front-wall echo creates a ”dead zone” where backscattered grain noise cannot be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f12974ff44b0882ecc75a5a99f314d3
https://doi.org/10.1063/1.4940607
https://doi.org/10.1063/1.4940607
Publikováno v:
AIP Conference Proceedings.
At Iowa State University’s Center for Nondestructive Evaluation (ISU CNDE), the use of models to simulate ultrasonic inspections has played a key role in RD and (2) a Fortran-based engine for computing defect signal and backscattered grain noise ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cf50c587f292997832635018200844f
https://doi.org/10.1063/1.4940530
https://doi.org/10.1063/1.4940530
Publikováno v:
AIP Conference Proceedings.
Ground penetrating radar (GPR), also known as impulse response radar, was used to examine a thick concrete block containing reinforcing steel bars (rebar) and embedded defects. The block was located at the University of Minnesota, measured approximat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32ebbff144f46eff9fe045a806cd9de8
https://doi.org/10.1063/1.4940460
https://doi.org/10.1063/1.4940460
Autor:
Paul D. Panetta, Pranaam Haldipur, L. Yu, H. Wasan, Anxiang Li, Frank J. Margetan, R. Bruce Thompson
Publikováno v:
Wave Motion. 45:655-674
The propagation of elastic waves in polycrystals is a classical topic with a rich history of research, with primary focus on attenuation in single phase materials with randomly oriented, equiaxed grains. Over the last decade, the need to nondestructi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83bfdca9df066da2b10130bd2347b18e
https://doi.org/10.1016/j.wavemoti.2007.09.008
https://doi.org/10.1016/j.wavemoti.2007.09.008
Autor:
Brittney Pavel, Chien-Ping Chiou, Frank J. Margetan, Aaron Herman, Daniel J. Barnard, Sunil Kishore Chakrapani
Publikováno v:
AIP Conference Proceedings.
In this paper we discuss nondestructive testing of five varieties of transparent armor panels fabricated from layers of glass, polymer and adhesive. The emphasis is on characterizing fabrication anomalies, such as lack of uniform layer thickness, rat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c314d812d3f051a5d69b7d322415ffa7
https://doi.org/10.1063/1.4914737
https://doi.org/10.1063/1.4914737
Publikováno v:
AIP Conference Proceedings.
Ground-penetrating radar (GPR) signals from concrete structures are affected by several phenomenon, including: (1) transmission and reflection coefficients at interfaces; (2) the radiation patterns of the antenna(s) being used; and (3) the material p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4871675c649bd623771c5426cf2405d
https://doi.org/10.1063/1.4914600
https://doi.org/10.1063/1.4914600