Journal of AE, Volume 25, 2007 (ca. 26 MB) - AEWG

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25-316 DEMAND ON FLEXURAL TENSION STEEL REINFORCEMENT ANCHORAGE ZONES IN FULL-SCALE BRIDGE BENT CAPS QUANTIFIED BY MEANS OF ACOUSTIC EMISSION THOMAS SCHUMACHER, CHRISTOPHER HIGGINS, STEVEN GLASER and CHRISTIAN GROSSE 25-324 DAMAGE EVALUATION OF POST-TENSIONED CONCRETE VIADUCT BY AE DURING PROOF LOADING EDOARDO PROVERBIO, GIUSEPPE CAMPANELLA and VINCENZO VENTURI 25-331 EARLY FAULT DETECTION AT GEAR UNITS BY ACOUSTIC EMISSION AND WAVELET ANALYSIS CHRISTIAN SCHEER, WILFRIED REIMCHE and FRIEDRICH-WILHELM BACH 25-341 APPLICATION OF ACOUSTIC EMISSION IN MONITORING OF FAILURE IN SLIDE BEARINGS IRENEUSZ BARAN, MAREK NOWAK and WOJCIECH DARSKI 25-348 MAPPING OF WHEEL FLANGE RUBBING ON RAIL USING AE: LABORATORY TEST N. A. THAKKAR, R. L. REUBEN and J. A. STEEL 25-355 DAMAGE ASSESSMENT OF GEARBOX OPERATING IN HIGH NOISY ENVIRONMENT USING WAVEFORM STREAMING APPROACH DIDEM OZEVIN, JASON DONG, VALERY GODINEZ and MARK CARLOS 25-364 CLUSTERING ANALYSIS OF AE IN ROCK N. IVERSON, C-S. KAO and J.F. LABUZ 25-373 IMPACT IMAGING METHOD TO MAP DAMAGE IN CONCRETE BRIDGE DECK SLABS STEPHEN D. BUTT, VIDYADHAR LIMAYE and JOHN P. NEWHOOK Contents25 Contents of Volume 25 (2007) I-1 – I-4 AUindex25 Authors Index of Volume 25 /e-mail addresses of authors I-5 – I-7 AusNotes Policy/Author’s Notes/Meeting Calendar/Subscription Information I-8 – I-10 In Memoriam Professor Reginald Hardy, Jr. I-11 EWGAE27 Note on expanded contributions from Cardiff Conference. I-12 JAE Index Folder* Cumulative Indices of J. of Acoustic Emission, 1982 - 2007 * indicates the availability in CD-ROM only. Cover photograph is from 25-294 by TATYANA KATSAGA and R. PAUL YOUNG. I-4
Volume 25 (2007) AUTHORS INDEX DIMITRIOS G. AGGELIS, 25-069, 25-308 MORITO AKIYAMA, 25-107 A. ANASTASOPOULOS, 25-033 FRIEDRICH-WILHELM BACH, 25-331 IRENEUSZ BARAN, 25-341 MICHEL BARBEZAT, 25-042 MATTHEW BAXTER, 25-215 M. R. BHAT, 25-224 S. BOUSIAS, 25-033 ANDREAS J. BRUNNER, 25-042 STEPHEN D. BUTT, 25-373 GIUSEPPE CAMPANELLA, 25-324 CLAUDIO CANEVA, 25-080 MARK CARLOS, 25-355 HIDEO CHO, 25-107, 25-124, 25-157, 25-172, 25-267 WOJCIECH DARSKI, 25-341 IGOR MARIA DE ROSA, 25-080 SETH-ANDREW T. DION, 25-187 JASON DONG, 25-355 MARK EATON, 25-140, 25-215 MANABU ENOKI, 25-247 SAM EVANS, 25-215 CAROL FEATHERSTON, 25-140 JENS FORKER, 25-132 STEVEN GLASER, 25-316 VALERY GODINEZ, 25-355 DAVID W. GREVE, 25-115 CHRISTIAN GROSSE, 25-316 M. A. HAMSTAD, 25-092, 25-194 TOMOHARU HAYANO, 25-107 CHRISTOPHER HIGGINS, 25-316 ERIC v. K. HILL, 25-187 KAREN HOLFORD, 25-140, 25-215 N. IVERSON, 25-364 TOSHIRO ISODA, 25-021 KAITA ITO, 25-247 MAGNUS T. JONSSON, 25-252, 25-260 C-S. KAO, 25-364 JUSTIN O. KARL, 25-187 TATYANA KATSAGA, 25-294 KRZYSZTOF J. KURZYDLOWSKI 25-166 I-5
Page 3 and 4: JOURNAL OF ACOUSTIC EMISSION VOLUME
Page 5: 25-194 ACOUSTIC EMISSION SOURCE LOC
Page 9 and 10: YUICHI TOMODA, 25-021 T. TOUTOUNTZA
Page 11 and 12: Notes for Contributors 1. General T
Page 13 and 14: In Memoriam H. Reginald Hardy, Jr.
Page 15 and 16: STRUCTURAL INTEGRITY EVALUATION USI
Page 17 and 18: The power-law AE behavior was recen
Page 19 and 20: sorting out the original signals, e
Page 21 and 22: Wood [36] in Australia has been usi
Page 23 and 24: One needs to appreciate the difficu
Page 25 and 26: In geotechnical applications, the p
Page 27 and 28: methods include the use of combined
Page 29 and 30: should take. Past attempts for stru
Page 31 and 32: 11. Suzuki, T., Ohtsu, M., Aoki, M.
Page 33 and 34: 40. http://en.wikipedia.org/wiki/Ma
Page 35 and 36: Abstract ACOUSTIC EMISSION TECHNIQU
Page 37 and 38: Fig. 1 Damage qualification by the
Page 39 and 40: After adding the data of a tested s
Page 41 and 42: Fig. 8 Sketch of a reinforced concr
Page 43 and 44: (3) Corrosion Process of Reinforced
Page 45 and 46: analysis. Corrosion cracking was si
Page 47 and 48: ACOUSTIC EMISSION MONITORING OF REI
Page 49 and 50: which - contrary to current beliefs
Page 51 and 52: Fig. 4. Applied load (actuator 1) a
Page 53 and 54: concrete and the jacket. Visual ins
Page 55 and 56: Based on conventional analysis, AE
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2. Experimental The model pipe syst
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pressure, respectively. This is ana
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Fig. 6: Power spectra from fast Fou
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small leaks (below 0.1 mm diameter)
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ACOUSTIC EMISSION TECHNIQUE APPLIED
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parameters in time domain and (c) m
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above the threshold level of 40 dB
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energy, i.e., high amplitude and lo
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An optical microscopy observation o
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Continuous WT (CWT) is defined as a
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Fig. 8. Typical AE waveforms, their
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followed by abrupt jumps in the det
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E. Landis (1999), “Micro-macro fr
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EVALUATION OF REPAIR EFFECT FOR DET
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Fig. 2 Sensor array for tomography
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2 [ ] 2 k 3 9 2 2 1 f () 0 f ()
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At these depths, a complicated and
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The number of AE hits after repair
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damage indices of Calm and Load rat
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PVDF is a semicrystalline polymer,
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After these preliminary tests, the
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of PVDF sensors does not seem to ha
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Fig. 10. Evolution of a typical PAD
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Fig. 17. Evolution of a typical dur
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I-G. Kim, H-Y. Lee and J-W. Kim (20
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Pencil-lead breaks are monopoles an
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Fig. 1 Displacement vs. time, sourc
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Fig. 5 Displacement vs. time, sourc
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Fig. 8 Displacement versus time for
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Fig. 10 Displacement vs. time. Sour
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Fig. 14 Signal amplitude versus tim
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To better relate these PLB and FEM
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HIGH-TEMPERATURE ACOUSTIC EMISSION
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thickness of 9 μm. The AlN element
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Fig. 5 Experimental setup for AE mo
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scales (and possibly salt cracks at
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DAMPING, NOISE, AND IN-PLANE RESPON
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The sharper resonance in Fig. 1c is
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i 2 RMS VDCC0 k BT = , g m 2 i
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ecause in-plane motion mostly produ
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4. B. Bahreyni, C. Shafai, Fabricat
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We first introduce our new quadridi
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Fig. 4 Amplitude profile as a funct
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Fig. 6 Change of room temperature (
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3) There are slight time lags in th
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Function Generator (FG) The functio
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Table 1 Results for continuous sens
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Fig. 7 pulse response XXX, filter :
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Fig. 11: Noise spectrum VS30-SIC-46
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waves propagate in a plate like str
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0.15 0 100kHz Driving pulse 10 100k
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0.45 0 100kHz Driving pulse 30 100k
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the sensor response to different fr
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CHARACTERISTICS OFACOUSTIC EMISSION
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Results and Discussion Shrinkage pr
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sapwood. Norway spruce wood consist
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most of the cells reached the fiber
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CHARACTERIZATION OF TITANIUM HYDRID
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Growth behavior of hydrides We stud
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were determined by the tensile test
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Figure 9 shows the Mode-I cracks in
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Results obtained are summarized as
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process of hydrogen destruction of
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Amplitude [dB] 60 55 50 45 40 35 30
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(Fig. 7) relative to the material a
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is shown in Table 1. Test specimens
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Fig. 4 Two types of AE signals dete
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the charging solution at 25 o C, by
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ANALYSIS OF ACOUSTIC EMISSION FROM
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nearly same waveforms for the first
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values). Most (11 of 14) of the rec
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Type-D (at 3.45 ms). In this sample
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NEURAL NETWORK BURST PRESSURE PREDI
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temperature, while the remaining se
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not properly set). This results in
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Conclusions Table 3 Summary of trai
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accurate source locations could be
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Fig. 1 Group velocities versus freq
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plane source orientation. But the l
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Fig. 9 Out-of-plane displacement vs
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Fig. 11 WTs of Fig. 8 with superimp
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Fig. 13 WTs of Fig. 10 with superim
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Table 3 At 102 kHz, WT peak arrival
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Fig. 17 Frequency of maximum WT int
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Fig. 18 Arrangement of sensors (#1,
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location calculation result that yi
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NOVEL ACOUSTIC EMISSION SOURCE LOCA
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tion resolution. It should be noted
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The specimen with numerous holes wa
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Fig. 5. Comparison of location meth
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Conclusions Delta-T source location
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Our approach This conceptual view c
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Voronoi Construction: Taking a case
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Fig. 6: Source location on a clamp
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PROBABILITY OF DETECTION FOR ACOUST
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POD is determined at the convergenc
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Fig. 2: Setup for illustrative runs
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Fig. 7: Probability of location (PO
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AE signals were filtered by high-pa
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Fig. 3 Accuracy and variations of a
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Fig. 7 Accuracy and variations of a
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eference data. The absolute values
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REAL-TIME DENOISING OF AE SIGNALS B
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600 500 400 300 200 kHz700 Frequenc
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the STFT result (Fig. 4(b)). Theref
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MONITORING THE EVOLUTION OF INDIVID
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the type of filtering, number of su
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was observed for either actuator. F
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Conclusions An experimental methodo
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the onset of pulses, consequently,
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zeros. The locations where a patter
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The reliability of the additional p
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AE MONITORING OF SOIL CORROSION OF
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Fig. 2 Cumulative AE counts with ap
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cumulative event counts and amplitu
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AE was monitored using three types
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Our conclusion from these tests is
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measurements with an Exxon Nuclear
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equipment manufacturer), CISE (AE t
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Automatic testing of receptacles du
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The finalized standards are: • EN
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14. Tscheliesnig P., Lackner G., He
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Fig. 1. Typical high-temperature cr
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• Emission rates are much higher
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Fig. 4. Results of AE monitoring of
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examination at 2000-5000X was able
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samples extracted from the beam aft
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The relative comparison of the size
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Fig. 3. Schema of VB Application fo
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Fig. 5. Microstructural observation
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Fig. 7 AE source locations for diff
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Fig. 9 CT images and corresponding
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A.M. Brandt, G. Prokopski, J. Mater
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conducted with AE technique. The AE
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After location of the events, inter
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The transit times of the individual
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6) B. Schechinger, T. Vogel, Acoust
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greater than the available anchorag
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location uncertainty and is the roo
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Figures 4 and 5 illustrate all loca
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ig cracks form, localization of AE
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ased on magnetic induction, while i
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Fig. 3. AE sensors positioning on b
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As a further evaluation of the degr
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EARLY FAULT DETECTION AT GEAR UNITS
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Acoustic Emission Analysis at Rotat
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The fixed bearing at the beginning
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The time-frequency components of a
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Additionally, the gear test bench h
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APPLICATION OF ACOUSTIC EMISSION IN
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Measurements of the acoustic backgr
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Fig. 6. RMS for different ranges of
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which indicate the transition from
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surface condition. It has already b
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( 2 1) 2) ! kx1 ! k c ! x + c ! k (
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Fig. 6: Signal above normal and def
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DAMAGE ASSESSMENT OF GEARBOX OPERAT
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The waveform streaming can be trigg
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Extracting features using different
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The classifier was used to identify
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ASL spectral energy is further calc
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2 #_ of _ Sensors 2 2 2 ( x ) (
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Simulated Failure Plane One hundred
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It has been documented that the ini
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(a) (b) (c) (d) 95% _ 98% 98% _ 100
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IMPACT IMAGING METHOD TO MAP DAMAGE
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e) Step d) was repeated until the a
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Panel A Panel B Panel C Panel D Fig
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Journal of AE, Volume 25, 2007 (ca. 26 MB) - AEWG

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