Table of Contents 99 Articles in Issue: 2012-02-01 | |
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Exhibitors (13) | |
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Title / Author(s) / Keywords
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 Multimedia Review of the ASNT Fall Conference and Quality Testing Show 2011 R. Diederichs 58 NDT.net 114, Bad Breisig, Germany NDT-wide, event, Exhibition, conference
NEWS
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|  Report on the NDT in Canada 2011 Conference L. Cote 6 c/o Mohawk College; Canadian Institute for NDE (CINDE) 27, Hamilton, ON, Canada NEWS
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|  New nuclear nozzle inspection robot passes the test Phoenix Inspection Systems Ltd 67, Warrington, United Kingdom NEWS
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|  SWIPE scanner makes inspection plane sailing Phoenix Inspection Systems Ltd 67, Warrington, United Kingdom NEWS
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|  New XL Go+ with XpertSuite? Increases Probability of Detection During Inspection GE Inspection Technologies GmbH 310, Hürth, Germany NEWS
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|  Fast, High Quality, Automated Castings Inspection with New Seifert x|blade from GE GE Inspection Technologies GmbH 310, Hürth, Germany NEWS
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|  VSG announces the release of Avizo? Fire 7, 3D visualization and analysis software for Industrial Inspection and Materials Research Thermo Fisher Scientific 13, Merignac, France NEWS
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|  Olympus Introduces The palm-sized IPLEX UltraLite videoscope Olympus Scientific Solutions Americas (OSSA) 230, Waltham, MA, USA NEWS
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|  CIVA Newsletter January 2012 EXTENDE 98, Massy, France NEWS
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|  Studienführer zur ZfP-Ausbildung an Universitäten, Hoch- und Fachhochschulen Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP) 160, Berlin, Germany NEWS
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|  Hamamatsu Photonics High Resolution Raman Mini-Spectrometer Hamamatsu Photonics 32, Hamamatsu-city, Japan NEWS
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|  Nondestructive Test Equipment - Global Strategic Business Report
NEWS
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|  IMCA Publishes Information Note on NDE Testing of Gas Cylinders The International Marine Contractors Association (IMCA), London, United Kingdom NEWS
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|  Breakthrough transmitter sets frequency record Technische Hochschule (TU) Darmstadt 20, Darmstadt, Germany NEWS
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|  FLIR Systems Launches Affordable, Compact High-Resolution InGaAs Camera FLIR Systems GmbH 3, Frankfurt am Main, Germany NEWS
| NDT.net Journal
|  CINDE's January to December 2012 Courses-at-a-Glance Canadian Institute for NDE (CINDE) 27, Hamilton, ON, Canada NEWS
| NDT.net Journal
| Detection, identification and sizing of plane defects with time-of- flight diffraction technique (TOFD) application in manual flaw detectors V. Radko 3 Ukrainian Scientific Research Institute on NDT (UkrRINDT) 11, Kiev, Ukraine Ultrasonic Testing (UT), railway
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The problem of detection, identification and sizing of planar defects, particularly cracks in various parts and items is one of the most relevant to non-destructive testing. This problem becomes even more complicated in case when testing is possible only with one surface of the part (e.g., during in-service inspection of various pipelines, vessels, equipment corps with limited access to the inner surface) to detect cracks, located in the opposite (inner) surface, both in the parent metal and in welds.
| NDT.net Journal
| Estimation Of Crustal Structure In Horonobe Area, Hokkaido, Japan, Using Multiplet-Clustering Analysis H. Moriya1 6, K. Asamori2, I. Kitamura3, H. Hotta3, H. Ohara4, T. Niizato5 1Graduate School of Environmental Studies; Tohoku University 47, Sendai, Japan 2Tono Geoscientific Research Unit.; Japan Atomic Energy Agency, Gifu, Japan 3Construction Project Consultants, Inc., Tokyo, Japan 4Kumagai Gumi Co. Ltd, Tokyo, Japan 5Horonobe Underground Research Unit; Japan Atomic Energy Agency 7, Hokkaido, Japan Subsurface measurement, Multiplet-clustering analysis, Repeating similar earthquakes
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Hypocenter locations of shallow earthquakes in Horonobe area, northern Hokkaido, Japan, which is near the convergent boundary between Okhotsk and Amuria plates, were determined to reveal the subsurface structure and the mechanisms of earthquake occurrence. The absolute source locations of 211 earthquakes, which occurred in the period from December 2002 to September 2005, were determined; then, those earthquakes with similar waveforms were identified, and the source locations of 26 multiplet groups were relocated by using cross-spectrum and clustering analyses. The relocated hypocenters allowed two seismically active areas to be identified, at 1020 km and 2530 km depth. The earthquake locations indicate structures trending nearly N-S direction, and the structures causing repeated stick-slips at asperities, thus generating similar earthquakes. The relationships between magnitude and the distance to the next event, and between magnitude and the time interval of event occurrences were investigated. The relationships between them suggest that earthquake swarms would be induced by continuous strain accumulation at asperities along faults and its subsequent release as a result of plate tectonic movements. A cutoff line could be also seen in the relationship between magnitude and the distance to the next event, suggesting that the distance between the source locations depends on the event magnitude. These results have given us the knowledge that the asperities on the delineated faults intermittently release strain energy as similar earthquakes with magnitudes of less than about 3.0.
| Journal-AE Session: Volume 28, 2010 | Acoustic Emission Testing - Defining a New Standard Of Acoustic Emission Testing For Pressure Vessels. Part 02:00 Performance Analysis Of Different Configurations Of Real Case Testing And Recommendations For Developing a New Guide For The Application Of A J. Catty 12 French Industrial and Mechanical Technical Centre (CETIM) 92, Senlis, France standard crimped contact, IDC (Insulation Displacement Connection), crimped connector, macroscopic analysis, CT inspection
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Several regulatory rules, such as the Best Practices Guideline (GBP) [1], exist for acoustic emission (AE) testing of pressure vessels in France and the rest of the world and allow AE testing based on two techniques (zonal location and planar source location methods). However, the analysis criteria of data recorded during the testing lack adequate basis. This work highlights inconsistencies in analysis methods defined in these guides or codes based on modelling calculations in Part 1 of this study [2], while this paper shows, from a real case (AE testing of a 2000 m3 spherical storage tank), that the results of an AE test cannot be reproducible due to a lack of strictness in the application rules of AE. Thus, depending on the testing configuration used, some emissive defects can be detected or missed. This study may also be used as a basis for defining a new AE testing standard specifically and quantitatively defining a methodology of analysis based on a different approach from those used currently. Today, the CETIM may apply this new testing methodology based on significant feedback enabling a greater reproducibility and sensitivity of AE testing.
| Journal-AE Session: Volume 28, 2010 | Acoustic Emission Monitoring Of Steel-Fiber Reinforced Concrete Beams Under Bending D. Aggelis1 27, D. Soulioti1, N. Barkoula1, A. Paipetis1, T. Matikas1 4, T. Shiotani2 29 1aDepartment of Materials Science and Technology bDepartment of Materials Science and Technology Department; University of Ioannina 9, Ioannina, Greece 2Graduate School of Engineering; Kyoto University 31, Kyoto, Japan Acoustic Emission (AE), concrete, average frequency, Bending, fracture mode, steel fibers, RA
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Bending, concrete, fracture mode, steel fibers. Introduction The application of fiber reinforcement in cementitious materials continues to expand. Fibers restrain the breakage of the brittle matrix and enhance its weak tensile properties (Stahli and van Mier, 2007). As the content of the fibers increases, the possibility that the crack growth will be hindered through an arrest mechanism also increases. As a result, the material toughness is also increased (Mobasher et al., 1990, Sivakuram and Sathanam, 2007). An unreinforced concrete member fails catastrophically at the maximum load. Fibers mainly improve its post-peak behavior, while in many cases the maximum load is also significantly increased (Fischer and Li, 2007, Washer et al. 2004). To clarify the mechanisms for this behavior, acoustic emission (AE) monitoring has been carried out during fracture tests. There are numerous applications of the AE technique for damage characterization of concrete structures (Shiotani and Aggelis, 2007, Shiotani et al. 2007, 2001, Aggelis et al. 2007, Triantafyllou and Papanikolaou, 2006, Golaski et al., 2006, Shah and Weiss 2006). Study of the AE behavior can lead to the characterization and quantification of the damage level via the use of AE descriptors and thus provides an early warning prior to the macroscopically observed fracture. Further study of the transient waveforms provides information about the fracture process. The source of the AE activity is closely connected to the mode of fracture (Shigeishi and Ohtsu, 1999). Nucleation of shear cracks follows tensile crack nucleation. Therefore, the determination of the dominant mode provides an early warning prior catastrophic failure. However, the application of AE to such materials entails certain difficulties. These mainly concern the accurate interpretation of the results due to the different individual processes that contribute to the fracture of concrete. Fracture occurs between different interfaces; cement paste and sand, mortar and aggregates, concrete and fibers. Additionally, failure includes aggregate crushing a
| Journal-AE Session: Volume 28, 2010 |
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