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OPUS 4 | Volltext-PDF im Netzwerk der BAM verfügbar ...

The propagation of ultrasonic waves in concrete is affected by its micro- and macro-structure, geometry and properties as well as external influences as stress, temperature or moisture. In addition, age and degradation have a strong influence. Therefore, Ultrasound has been used to monitor concrete samples and structures since decades.

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Measuring Thickness by Manual Ultrasonic - eptis.bam.de

metal plates, pipes, metal blocks any material in which ultrasonic waves will propagate at a constant velocity throughout the part, and from which back reflections can be obtained and resolved. Measuring Thickness by Manual Ultrasonic: E797/E797M − 15 Standard Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method-

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Sanjeevareddy Kolkoori - Development Engineer - Rosen ...

Research Associate Federal Institute for Materials Research and Testing,BAM,Berlin,Germany September 2009 – August 2012 3 years. Berlin, Germany * Developing novel ultrasonic .

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Embedded Ultrasonic Transducers for Active and Passive ...

2.1. Transducer Design and Description. New ultrasonic transducers ("SO807") have been designed by Acoustic Control Systems, Ltd. (ACS, Moscow, Russia) in cooperation with and exclusively for BAM (Figure 1).The main part is a hollow piezoceramic cylinder of 20 mm diameter and 35 mm length.

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Elastic wave modes for the assessment of ... - SpringerLink

Oct 25, 2014 · Two very promising approaches based on the propagation and reflections of elastic waves are described. While the first approach uses ultrasonic echoes for the testing of wooden building elements, the second approach uses guided waves (GW) .

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BAM Testing in U.S. Tunnels - The National Academies Press

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF ...

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45thAnnualReviewofProgressinQuantitativeNondestructiveEval ...

U. S in Ultrasonic Guided Wave NDE/SHM. He is a full professor in the School of Mechanical Engineering, P(B)usan National University, South Korea. He also spent years at Penn State University and Northwestern University, U.S as research and visiting professors, respectively. His research includes ultrasonic wave modeling, guided wave

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BAM - Infrastructure - Research trainees on the trail of ...

Ph.D. student Xin Wang is involved in the development of innovative ultrasound networks for structural monitoring at BAM. Changes between damaged and intact structures shows that damage can sometimes not be detected when mapping the direct ultrasonic wave.

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Elastic wave modes for the assessment of structural timber ...

Elastic wave modes for the assessment of structural timber: Ultrasonic echo for building elements and guided waves for pole and pile structures Martin Krause1*, Ulrike Dackermann2, Jianchun Li2 1Federal Institute for Materials Research and Testing (BAM), Division .

  • Published in: Journal of Civil Structural Health Monitoring · 2015Authors: Martin Krause · U Dackermann · Jianchun LiAffiliation: Bundesanstalt Fur Materialforschung Und Prufung · University of Technology SydneyAbout: Impulse response · Guided wave testing[PDF]Get Price
TiO2 composite and study some acoustic properties by ...

In order to evaluate the mechanical properties of PVA/TiO2 composite the ultrasonic measurements were performed at the samples, these properties are ultrasonic velocity, compressibility, acoustic impedance, relaxation time, bulk modulus, shear viscosity and density were analyzed at different frequencies (25,30,35,40) KHz, another acoustic ...

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Ernst Niederleithinger | PD Dr. rer. nat. | Bundesanstalt ...

BAM Bundesanstalt für Materialforschung und -prüfung ... Coda Wave Interferometry (CWI) for ultrasonic data is one of the most promising methods to detect subtle changes in heterogeneous ...

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Skeletal muscle ultrasound - bio.unipd

the ability of high-frequency ultrasonic waves to visualize living tissues [42]. Since then, the technique of ultrasound has rapidly evolved, leading to its widespread use in almost all fields of medicine because of its non-invasive nature and real-time display. In 1980 it was first discovered that diseased muscles

  • Published in: European Journal of Translational Myology · 2010Authors: Sigrid PillenAffiliation: Radboud University Nijmegen Medical CentreAbout: Ultrasound · Skeletal muscleGet Price
Elastic wave modes for the assessment of structural timber ...

Elastic wave modes for the assessment of structural timber: Ultrasonic echo for building elements and guided waves for pole and pile structures Martin Krause1*, Ulrike Dackermann2, Jianchun Li2 1Federal Institute for Materials Research and Testing (BAM), Division .

  • Published in: Journal of Civil Structural Health Monitoring · 2015Authors: Martin Krause · U Dackermann · Jianchun LiAffiliation: Bundesanstalt Fur Materialforschung Und Prufung · University of Technology SydneyAbout: Impulse response · Guided wave testing[PDF]Get Price
Ultrasonics | physics | Britannica

Ultrasonics, vibrations of frequencies greater than the upper limit of the audible range for humans—that is, greater than about 20 kilohertz. The term sonic is applied to ultrasound waves of very high amplitudes. Hypersound, sometimes called praetersound or microsound, is sound waves of frequencies

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Advanced NDT methods for the assessment of concrete .

Advanced NDT methods for the assessment of concrete structures H. Wiggenhauser Federal Institute for Material Research and Testing (BAM), Berlin, Germany ABSTRACT: The development of methods for the Non-Destructive Evaluation (NDE) of concrete and masonry structures has made considerable progress in the past two decades.

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Are ultrasonic pest repellers effective? | Office for ...

Nov 27, 2017 · Unfortunately, the science behind ultrasonic pest repellers is ultra-shaky. Seems like an attractive idea though, right? Just plug a charger-sized device emitting undetectable sound into the wall, wait about 2 weeks, then BAM, your garage oasis is insect and rodent free without the use of chemical pesticides or inhumane traps. Sounds great! Too bad these devices have never

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Course Agenda - event.asme

These second harmonic techniques are acoustic wave based, so component interrogation can be performed in situ using either bulk, surface and guided waves. Since the underlying material physics is independent of the choice of ultrasonic wave, it is possible to interrogate a variety of different structural systems for microscale defects.

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Resources < Ultrasound < Acoustics, Ultrasound and Vibration

Blue Wave Ultrasonics, formerly Bendix Ultrasonics and Swen Sonic, is a leading manufacturer of ultrasonic cleaning equipment for industrial and medical parts and precision cleaning applications. ... G. Schenk BAM - Berlin Corresponding Author Contact: Email: [email protected] TABLE OF CONTENTS Introduction Probe related parameters ...

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Ultrasound: 7 Reasons Your Developing Baby Says It's NOT ...

Jul 24, 2015 · Ultrasound machines adapted for use as a medical test must generate waves only in pulses because one continuous ultrasound wave could produce too much heat potentially damaging the tissue being examined. Depending on the machine used, ultrasound during pregnancy can pulse to pick up a baby's heartbeat and create an image of the baby and placenta.

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