Zobrazeno 1 - 10
of 44
pro vyhledávání: '"R E Challis"'
Publikováno v:
Universal Journal of Materials Science. 1:201-209
Ultrasonic NDE of case hardening of steel parts presents an attractive alternative to destructive assessment still used in industry. This experimental study showed that the ultrasonic assessment could be conducted by measuring two average times of fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d5e7ebab0a3d5d0194aed6ca9bc1c0d
https://doi.org/10.13189/ujms.2013.010403
https://doi.org/10.13189/ujms.2013.010403
Autor:
Panagiotis I. Karkanas, R. J. Freemantle, D.J. Dare, M. E. Unwin, R. E. Challis, D.L. Chadwick, Ivana K. Partridge
Publikováno v:
Journal of Applied Polymer Science. 88:1665-1675
This article presents a comparison of data obtained from a low-temperature cure of an epoxy/amine system by three independent cure monitoring techniques: ultrasonic wave propagation, dielectric permittivity, and nuclear magnetic resonance. The sizes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33fdbbad085040770235f82301129e1b
https://doi.org/10.1002/app.11822
https://doi.org/10.1002/app.11822
Publikováno v:
Journal of the European Ceramic Society. 22:1119-1127
The dependence of the elastic properties of a range of powder compact samples has been measured as a function of firing variables. It was found that both Young's modulus and Poisson's ratio are particularly sensitive to the peak temperature and the t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52e965ca4bedf757ad7c9edb9970ce00
https://doi.org/10.1016/s0955-2219(01)00416-2
https://doi.org/10.1016/s0955-2219(01)00416-2
Publikováno v:
Nondestructive Testing and Evaluation. 17:263-273
A range of disc shaped ceramic powder compact samples with controlled densities were produced using manufacturing conditions that mimic those used for industrial tile manufacture. Ultrasonic compression-wave velocity measurements were made, and a str
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb7c4ac29eeff2518a4e4b5f03d0d509
https://doi.org/10.1080/10589750108953114
https://doi.org/10.1080/10589750108953114
Autor:
D.J. Dare, R.P. Cocker, Watson Fuller, Arumugam Mahendrasingam, C. Martin, R. E. Challis, R. J. Freemantle, D.L. Chadwick
Publikováno v:
Plastics, Rubber and Composites. 29:109-118
The tracking of the cure of epoxy adhesives and the assessment of the cure state of adhesive bondlines joining engineering components are important for quality assurance during manufacture and for the safe functioning of manufactured assemblies in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b5ab9e332130fad95473e313907017b
https://doi.org/10.1179/146580100101540860
https://doi.org/10.1179/146580100101540860
Autor:
Andrew K. Holmes, R. E. Challis
Publikováno v:
Journal of Colloid and Interface Science. 216:50-58
Acoustic attenuation and phase velocity in the frequency range 2-50 MHz have been measured in a series of silica sols and gels with particle sizes in the range 12-30 nm, and concentrations in the range 5-40% (w/w). Results have been compared with bot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2050da0e77ff0b03acfd8b5fd5e44946
https://doi.org/10.1006/jcis.1999.6301
https://doi.org/10.1006/jcis.1999.6301
Publikováno v:
Langmuir. 15:3356-3364
Ultrasound is beginning to be used to characterize many types of industrial two-phase dispersions, both suspensions and emulsions. It also has great potential as a process-monitoring tool alongside the well-established techniques of conductivity, pH,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7010531511804ce39b7dd87bc749beb
https://doi.org/10.1021/la9815244
https://doi.org/10.1021/la9815244
Autor:
Andrew K. Holmes, R. E. Challis
Publikováno v:
Langmuir. 15:3045-3049
Acoustic attenuation and phase velocity in the frequency range 2−50 MHz have been measured in a series of silica sols and gels with different ionic strengths, to investigate the effect of interparticle forces on acoustic propagation. While sols and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce56af7ee83519f43b23959fab129371
https://doi.org/10.1021/la981391m
https://doi.org/10.1021/la981391m
Autor:
R. E. Challis, C.P.D. Todd
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 46:167-181
Adhesive bonding of metal assemblies is gaining acceptance for use with safety critical structures, and there is a need for effective inspection for both quality assurance (QA) and the assessment of condition in service. One aspect of QA is the need
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0759db6840cd3261735eec35a996efe
https://doi.org/10.1109/58.741528
https://doi.org/10.1109/58.741528
Autor:
R E Challis, R J Freemantle
Publikováno v:
Measurement Science and Technology. 9:1291-1302
This paper describes an ultrasonic technique to study the propagation of wide bandwidth compression and shear wave pulses in a curing adhesive. A temperature controlled water filled test cell with transducers placed at either end is used to couple ul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5197f28f352951c1f1091312b6c82d4b
https://doi.org/10.1088/0957-0233/9/8/023
https://doi.org/10.1088/0957-0233/9/8/023