Progress Towards a Forward Model of the Complete Acoustic Emission Process

2006 ◽  
pp. 69-76
Author(s):  
Paul D. Wilcox ◽  
C.K. Lee ◽  
Jonathan J. Scholey ◽  
M. I. Friswell ◽  
M.R. Wisnom ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Forward Model ◽  
Emission Process

scholarly journals Infrared-assisted acoustic emission process monitoring for additive manufacturing

2019 ◽  
Author(s):  
Yuri Plotnikov ◽  
Dan Henkel ◽  
Jeffrey Burdick ◽  
Arthur French ◽  
John Sions ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Additive Manufacturing ◽  
Process Monitoring ◽  
Emission Process

Structural Health Monitoring of Bridges

2011 ◽  
pp. 244-254
Author(s):  
Manindra Kaphle ◽  
Andy Tan ◽  
David Thambiratnam ◽  
Tommy Chan
Keyword(s):  
Acoustic Emission ◽  
Structural Health Monitoring ◽  
Source Localization ◽  
Health Monitoring ◽  
Urban Infrastructure ◽  
Acoustic Emission Technique ◽  
Emission Process ◽  
Structural Health ◽  
Civil Infrastructures ◽  
Current State

Managing the sustainability of urban infrastructure requires regular health monitoring of key infrastructure such as bridges. The process of structural health monitoring involves monitoring a structure over a period of time using appropriate sensors, extracting damage sensitive features from the measurements made by the sensors, and analysing these features to determine the current state of the structure. Various techniques are available for structural health monitoring of structures, and acoustic emission is one technique that is finding an increasing use in the monitoring of civil infrastructures such as bridges. Acoustic emission technique is based on the recording of stress waves generated by rapid release of energy inside a material, followed by analysis of recorded signals to locate and identify the source of emission and assess its severity. This chapter first provides a brief background of the acoustic emission technique and the process of source localization. Results from laboratory experiments conducted to explore several aspects of the source localization process are also presented. The findings from the study can be expected to enhance knowledge of the acoustic emission process, and to aid the development of effective bridge structure diagnostics systems.

scholarly journals An investigation of Drilling characteristics of Carbon-Carbon composites by Acoustic emission process

2017 ◽  
Vol 13 (8) ◽  
pp. 6432-6437
Author(s):  
P. Saravana Kumar ◽  
P. Hariharan
Keyword(s):  
Acoustic Emission ◽  
Feed Rate ◽  
Test Specimen ◽  
Thrust Force ◽  
Carbon Composites ◽  
Drill Bit ◽  
Sem Images ◽  
Emission Process ◽  
Drill Holes ◽  
Scanning Electron

Titanium coated tungsten carbide (Ti-WC) drill bit was used for drilling on the carbon-carbon composites laminates. The drilling speed was varied between 1000 to 3000 rpm with different feed rate of the drill. With respect to the time, the thrust force exerted on the laminates and the torque induced were assessed through acoustic emission process. The delamination factor (Fd) has been determined from the top surface of the drill holes through scanning electron microscope (SEM) images. The results obtained from the test specimen depending on the variation of the feed rate and the speed of the drill were discussed in detail. 

scholarly journals Monitoring of underdeck corrosion by using acoustic emission method

2013 ◽  
Vol 21 (1) ◽  
pp. 54-61
Author(s):  
Krzysztof Emilianowicz
Keyword(s):  
Acoustic Emission ◽  
Corrosion Process ◽  
Corrosion Testing ◽  
Testing Device ◽  
Acoustic Emission Method ◽  
Quality Systems ◽  
Emission Method ◽  
Emission Process ◽  
University Of Technology ◽  
Measuring Instrumentation

ABSTRACT This paper presents first short characteristics of underdeck corrosion process as well as a problem of its monitoring. Next is described an acoustic emission (AE) method elaborated by Department of Ship Technology, Quality Systems and Material Engineering, Gdańsk University of Technology in cooperation with partners of CORFAT project realized within 7th EU Frame Program. Further are presented short characteristics of the emission process, used measuring instrumentation of Vallen Systeme GmbH, as well as TESTER, corrosion testing device, and a corrosion solution used in the tests. Finally, results of the tests performed on selected marine units, are presented.

Propagation of acoustic emission signals in metallic fuselage structure

2001 ◽  
Vol 148 (4) ◽  
pp. 169-177 ◽  
Author(s):  
R.P. Dalton ◽  
P. Cawley ◽  
M.J. Lowe
Keyword(s):  
Acoustic Emission

Comparison of random field strengths in (1-x)SrTiO3-xBiFeO3 and (1-x)SrTiO3-xBaTiO3 relaxor ferroelectrics by means of acoustic emission

2020 ◽  
Vol 92 (2) ◽  
pp. 20401
Author(s):  
Evgeniy Dul'kin ◽  
Michael Roth
Keyword(s):  
Acoustic Emission ◽  
Random Field ◽  
Electric Fields ◽  
Bias Field ◽  
Relaxor Ferroelectrics ◽  
External Bias ◽  
Field Strengths

In relaxor (1-x)SrTiO3-xBiFeO3 ferroelectrics ceramics (x = 0.2, 0.3 and 0.4) both intermediate temperatures and Burns temperatures were successfully detected and their behavior were investigated in dependence on an external bias field using an acoustic emission. All these temperatures exhibit a non-trivial behavior, i.e. attain the minima at some threshold fields as a bias field enhances. It is established that the threshold fields decrease as x increases in (1-x)SrTiO3-xBiFeO3, as it previously observed in (1-x)SrTiO3-xBaTiO3 (E. Dul'kin, J. Zhai, M. Roth, Phys. Status Solidi B 252, 2079 (2015)). Based on the data of the threshold fields the mechanisms of arising of random electric fields are discussed and their strengths are compared in both these relaxor ferroelectrics.

Sign in / Sign up

Export Citation Format

Share Document