Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 7 of 7 for “"Acoustic emission testing"”.
-
Damage detection in composite materials using acoustic emission and self-sensing fibres
… this study was to investigate the abilities of acoustic emission testing and self-sensing fibres to detect damage in composite materials. This was achieved by performing acoustic emission testing on fibre samples and resin samples during tensile tests. In parallel to the acoustic emission …
-
A critical analysis of the acoustic emission technique for NDE of pressure vessels
As a nondestructive examination, the acoustic emission technique is used to detect the presence of discontinuities inside of pressurized components. However, doubts still exist concerning the loading procedure to accomplish the acoustic emission testing, especially, in a pressure vessel where a …
-
Measuring Acoustic Attenuation of Polymer Materials Using Drop Ball Test
… of sound waves traveling through it is called acoustic attenuation. In the past, attenuation has mostly been evaluated in the MHz frequency range, using a pulse generator and transmitting transducer as the wave source. However, most real acoustic activities occur at frequencies up to a few …
-
Effects of Extreme Low Temperature on Composite Materials
… in composites at cryogenic temperatures by acoustic emission technique. Microcracks increase the permeability of composites. So to study the permeability growth with microcracks, equipment is also designed to measure the permeability of composite to low temperature fluids. With short beam …
-
Optical fiber detection of ultrasonic vibration and acoustic emission
… the study is to develop a sensor for detecting acoustic emissions (AE) inside composite structures. The basics of wave propagation inside of materials has been presented along with an overview of typical acoustic emission testing. Surface acoustic waves (SAWs) were studied first and a novel, …
-
Nondestructive evaluation for hybrid-composite girder bridges
… (NDE) technologies of thermography, ultrasonic testing, and acoustic emission testing to assess the quality of placement within the arch section of the HCB. Tap testing, another NDE technique, was also used to test the quality of the FRP shell construction. The research shows that thermography …
-
Structural and residual strength analysis of metal-to-metal adhesively bonded joints.
… the failure behaviour of adhesive bonds. Acoustic emission (AE) was used to monitor the adhesive bond failure experimentally. AE-based pencil lead break (PLB) tests were used to detect the defects in adhesive joints manufactured with two different adhesive types (brittle, ductile) and …