Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Marvin A. Hamstad"'
Publikováno v:
Sensors, Vol 15, Iss 5, Pp 11805-11822 (2015)
Acoustic emission (AE) testing is a widely used nondestructive testing (NDT) method to investigate material failure. When environmental conditions are harmful for the operation of the sensors, waveguides are typically mounted in between the inspected
Externí odkaz:
https://doaj.org/article/b712aeb9fd7f4467967a93915aba361e
Publikováno v:
Frontiers in Plant Science, Vol 6 (2015)
When drought occurs in plants, acoustic emission signals can be detected, but the actual causes of these signals are still unknown. By analyzing the waveforms of the measured signals, it should however be possible to trace the characteristics of the
Externí odkaz:
https://doaj.org/article/4cd4bdd06b1c4f97aba1617cb78891ae
Autor:
Markus G. R. Sause, Marvin A. Hamstad
This chapter introduces the use of acoustic emission (AE) methods to detect the occurrence of damage in composite materials during loading. The description and modeling of typical source mechanisms, such as cracks of various types and friction are pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09c6240a05a85b0be632df889cbb623f
https://doi.org/10.1016/b978-0-12-803581-8.10036-0
https://doi.org/10.1016/b978-0-12-803581-8.10036-0
Publikováno v:
Sensors
Volume 15
Issue 5
Pages 11805-11822
Sensors (Basel, Switzerland)
Sensors, Vol 15, Iss 5, Pp 11805-11822 (2015)
Volume 15
Issue 5
Pages 11805-11822
Sensors (Basel, Switzerland)
Sensors, Vol 15, Iss 5, Pp 11805-11822 (2015)
Acoustic emission (AE) testing is a widely used nondestructive testing (NDT) method to investigate material failure. When environmental conditions are harmful for the operation of the sensors, waveguides are typically mounted in between the inspected
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1fb6d5dafc190a7c622f313652ea898
Autor:
Marvin A. Hamstad
Publikováno v:
Advanced Materials Research. :61-68
Acoustic emission (AE) practitioners routinely use surface pencil lead breaks (monopoles) to observe expected AE signal characteristics. In contrast, stress-generated AE sources are almost universally composed of dipoles. Thus, understanding the prim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d85205b4ed3a48756098ccda7e535c9a
https://doi.org/10.4028/www.scientific.net/amr.13-14.61
https://doi.org/10.4028/www.scientific.net/amr.13-14.61
Publikováno v:
Journal of Nondestructive Evaluation. 18:83-90
A comparison was made between two approaches to predict acoustic emission waveforms in thin plates. A normal mode solution method for Mindlin plate theory was used to predict the response of the flexural plate mode to a point source, step-function lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c16909cbe78806087900e35af47964a9
https://doi.org/10.1023/a:1021888009896
https://doi.org/10.1023/a:1021888009896
Autor:
Marvin A. Hamstad, K. S. Downs
Publikováno v:
Journal of Composite Materials. 32:258-307
Six aerospace-type, filament-wound graphite/epoxy pressure vessels were studied. Four of these cylindrical vessels had each received a single, controlled impact; four had received thermal exposures including moderate heat and/or cryogenic cold. Acous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92dc462051571ee54c4550b47c632ad5
https://doi.org/10.1177/002199839803200304
https://doi.org/10.1177/002199839803200304
Publikováno v:
Key Engineering Materials. :65-92
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e34c1cf193b9f1e9b668f1ca59fc449
https://doi.org/10.4028/www.scientific.net/kem.141-143.65
https://doi.org/10.4028/www.scientific.net/kem.141-143.65
A finite element approach for modeling of acoustic emission sources and signal propagation in hybrid multi-layered plates is presented. Modeling results are validated by Laser vibrometer measurements and comparison to calculated dispersion curves. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::724db599774ac034c9b24da79035332a
Mass-backed piezoelectric conical sensor elements are investigated by modeling and corresponding experiments for their response to pencil lead breaks on an aluminum plate. For the experiment and modeling investigation, the plate is chosen large enoug
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15ef075dc38b68e14d6a12b37f5caa22
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/59454
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/59454