Results 61 to 70 of about 11,967 (233)

Ionization versus displacement damage effects in proton irradiated CMOS sensors manufactured in deep submicron process [PDF]

, 2009
Proton irradiation effects have been studied on CMOS image sensors manufactured in a 0.18 μm technology dedicated to imaging. The ionizing dose and displacement damage effects were discriminated and localized thanks to 60Co irradiations and large ...
Bernard, Frédéric, Goiffon, Vincent, Magnan, Pierre, Rolland, Guy, Saint-Pé, Olivier   +4 more
core   +2 more sources

A preliminary investigation of the dynamic viscoelastic relaxation of bovine cortical bone

EPJ Web of Conferences, 2015
A new experimental approach is proposed to characterize the dynamic viscoelastic relaxation behaviour of cortical bone. Theoretical models are presented to show that a linear viscoelastic material, when allowed to relax between two long elastic bars ...
Loete T.J.C., Paul G., Ismail E.B.
doaj   +1 more source

Dynamic Compression Tests – Current Achievements and Future Development

Engineering Transactions, 2014
In this paper a modified arrangement of the DICT technique was introduced. Miniatur- ization of bar and use of shadow principle to make a measurement of displacement allow to obtain strain rate up to 2.2×105 s−1.
W. MOĆKO, Z. L. KOWALEWSKI
doaj   +1 more source

Experiments with the Hopkinson pressure bar [PDF]

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1923
In November, 1913, the late Professor Bertram Hopkinson read a paper before the Royal Society entitled “ A method of measuring the Pressure produced in the Detonation of High Explosives or by the Impact of Bullets.” (‘ Phil. Trans.,’ Royal Society of London. Series A, vol. 213 ; and Collected Papers, p.
openaire   +1 more source

Stress equilibrium effects within Hopkinson bar specimens [PDF]

Le Journal de Physique IV, 1994
In the compression testing version of the split Hopkinson pressure bar technique a small disc-shaped specimen, sandwiched between two high-strength steel bars, is compressed by a stress pulse. The stress/strain properties of the specimen can be derived from the amount of the stress pulse reflected and transmitted by the specimen, assuming that stress ...
Parry, D., Dixon, P., Hodson, S., Al-Maliky, N.   +3 more
openaire   +2 more sources

Dynamic tensile strength and fracture evolution of characteristic shale with bedding and hole using linear regression theory

Deep Underground Science and Engineering, EarlyView.
The spiral conical perforations generated during methane in situ explosion fracturing operations lead to tensile fracture propagation in shale reservoirs being governed by the combined effects of impact pressure, bedding, and aperture under explosive loading. Using multiple regression analysis and digital image correlation technology, the mechanisms of
Yabo Chai, Ning Luo, Jianan Zhou, Haohao Zhang, Penglong Li, Yu Wang, Cheng Zhai, Tianran Ma   +7 more
wiley   +1 more source

Development of a Hopkinson bar apparatus for testing soft materials: application to a closed-cell aluminum foam [PDF]

, 2016
An increasing interest in lightweight metallic foams for automotive, aerospace and other applications has been observed in recent years. This is mainly due to the weight reduction that can be achieved using foams and for their mechanical energy ...
BABCSAN Norbert, PERONI MARCO, SOLOMOS George   +2 more
core   +1 more source

Characterisation and modelling of structural bonding at high strain rate

EPJ Web of Conferences, 2012
These paper deals with the development of new bonded joint modelling for crash application. A new testing device has been set up on Split Hopkinson bars in order to identify adhesive’s properties in assemblies for high strain rate and for different ...
Lesueur D., Bennani B., Lauro F., Bourel B., Haugou G., Morin D.   +5 more
doaj   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

Size matters: the value of small populations for wintering waterbirds [PDF]

, 2004
Protecting systematically selected areas of land is a major step towards biodiversity conservation worldwide. Indeed, the identification and designation of protected areas more often than not forms a core component of both national and international ...
Atkinson-Willes G. L., Boyd H., Cranswick P. A., Freitag S., Fuller R. J., Hocklings M., IUCN, Jackson S. F., JNCC, JNCC, JNCC, Kevin J. Gaston, Mayr E., Melanie Kershaw, Pollitt M. S., Pollitt M. S., Ramsar Convention Bureau, Ramsar Convention Bureau, Ramsar Convention Bureau, Ramsar Convention Bureau, Ramsar Convention Bureau, Rose P., Rose P. M., Sarah F. Jackson, Scott D. A., Stroud D. A., Stroud D. A.   +26 more
core   +1 more source