Zobrazeno 1 - 10
of 31
pro vyhledávání: '"A. D. W. McKie"'
Publikováno v:
MRS Bulletin. 21:53-57
A noncontact inspection system that uses lasers to both generate and detect ultrasonic waves has been developed at the Rockwell Science Center for the purpose of nondestructively inspecting metallic and composite structures. The laser-based ultrasoun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e65904b18eb0fedad7f53467e94714c
https://doi.org/10.1557/s0883769400031651
https://doi.org/10.1557/s0883769400031651
Autor:
Robert C. Addison, Andrew D. W. McKie
Publikováno v:
Ultrasonics. 32:333-345
An automated laser-based ultrasound system is described that has sufficient sensitivity to detect typical flaws of interest in composite materials without causing surface damage to the part under test. An important step in achieving a rapid scanning
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fa822245a9bd9e84d8b17639ad37a54
https://doi.org/10.1016/0041-624x(94)90103-1
https://doi.org/10.1016/0041-624x(94)90103-1
Publikováno v:
Journal of Nondestructive Evaluation. 9:263-270
Patterned illuminating sources and appropriate time modulation may be used to enhance certain features of laser-generated acoustic waves in time or frequency as a function of direction. Steerable, narrowband, “toneburst” ultrasonic signals have b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87fcc486d789fb745b836a4e8fc8f7cf
https://doi.org/10.1007/bf00565644
https://doi.org/10.1007/bf00565644
Publikováno v:
IEEE Symposium on Ultrasonics.
The authors describe investigations directed at the use of spatial arrays and temporal beam modulation to generate ultrasonic signals which are both narrowband and may be directed ('steered') over some angle within the test piece. By directing a port
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a02340a3e8e28000dd28d7948e4932e7
https://doi.org/10.1109/ultsym.1990.171446
https://doi.org/10.1109/ultsym.1990.171446
Autor:
Robert C. Addison, Andrew D. W. McKie
Publikováno v:
Ultrasonics. 40(10)
State-of-the-art integrally stiffened composite materials, manufactured for use in the next generation of commercial and military aircraft, are increasingly being used for structural components such as wings and fuselages. However, the complexity of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::791bd516e5066e1080b94734430a756d
https://pubmed.ncbi.nlm.nih.gov/12441180
https://pubmed.ncbi.nlm.nih.gov/12441180
Publikováno v:
AIP Conference Proceedings.
Thickness measurements of glass plates and glass bottles using laser-based ultrasound (LBU) are described. Ultrasound in the glass specimens was generated thermoelastically with either a pulsed CO2 laser, or a Q-switched Nd:YAG laser in the case of c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb7990302713da0a7f8b24d279c1c742
https://doi.org/10.1063/1.1373771
https://doi.org/10.1063/1.1373771
Autor:
R. C. Addison, A. D. W. McKie
Publikováno v:
AIP Conference Proceedings.
The ability to quickly and directly manipulate flexible low mass optical fibers equipped with specialized endoscopic scanning optics make fiber systems an attractive method for the development of limited and remote access inspection systems. Previous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f73cb84d80b88d18ac883693fb93e7a
https://doi.org/10.1063/1.1306057
https://doi.org/10.1063/1.1306057
Publikováno v:
Applied Physics Letters. 57:1882-1884
Numerical inversion of the Hankel–Laplace transform has been performed for the case of ultrasonic displacements in an infinite, homogeneous, isotropic plate which is excited thermoelastically by a laser pulse. Values for the elastic moduli and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba93ce3233bd184e9bcd5b8cfe3a0dcb
https://doi.org/10.1063/1.103999
https://doi.org/10.1063/1.103999
Publikováno v:
Applied Physics Letters. 56:2390-2392
A passively mode‐locked, flashlamp‐pumped Nd:YAG laser with a cavity length of 11.19 m has been developed to study the noncontact generation of narrow‐band ultrasound. The individual mode‐locked pulses acted as separate sources of ultrasound,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d153831d55a77c77dd1f5af7370be075
https://doi.org/10.1063/1.102925
https://doi.org/10.1063/1.102925
Autor:
Robert C. Addison, Andrew D. W. McKie
Publikováno v:
SPIE Proceedings.
Previously, the applicability of laser-based ultrasonic techniques for the automated inspection of polymer-matrix airframe structures, having either flat or contoured geometries, has been demonstrated without restriction to large radii of curvature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79f949522108909a64acc7ffa86e84f2
https://doi.org/10.1117/12.305041
https://doi.org/10.1117/12.305041