Possibility of measuring shear waves in oblique‐impact experiments with in‐material piezoresistance gauges

1986 ◽  
Vol 59 (11) ◽  
pp. 3928-3930 ◽  
Author(s):  
Z. Rosenberg ◽  
S. J. Bless
Keyword(s):  
Shear Waves ◽  
Oblique Impact ◽  
Impact Experiments

Measurements of Combined Pressure-Shear Waves by the Oblique-Parallel Impact Experiment

2014 ◽  
Vol 566 ◽  
pp. 437-440
Author(s):  
Kenichi Ogata ◽  
X. Liu ◽  
Tsutomo Mashimo
Keyword(s):  
Shear Modulus ◽  
Single Crystal ◽  
Experimental Method ◽  
Shear Wave ◽  
Shock Compression ◽  
Shear Waves ◽  
Impact Experiment ◽  
Impact Experiments

Measurements of shear wave under shock compression give important information of the shear modulus and strength. We had started the measurements of the combined pressure-shear waves by the oblique parallel-impact experiments on sapphire (α-Al2O3single crystal) in several 10s of GPa region by the electromagnetic-gauge method and inclined-mirror method. The samples used ware c-cut sapphire plates. In this paper, the experimental method and configuration of the system are describes. The result will be presented at the conference.

An approach towards the projectile trajectory during the oblique Steinheim meteorite impact by the interpretation of structural crater features and the distribution of shatter cones

2017 ◽  
Vol 155 (1) ◽  
pp. 193-202 ◽  
Author(s):  
E. BUCHNER
Keyword(s):  
Structural Features ◽  
Oblique Impact ◽  
Meteorite Impact ◽  
Central European ◽  
Eastern Segment ◽  
The Asymmetry ◽  
Shatter Cones ◽  
The Impact ◽  
Impact Experiments ◽  
Good Agreement

AbstractThe distinct alignment of the Steinheim Basin and the Nördlinger Ries impact structures in SW Germany and the Central European tektite strewn field suggest ENE-directed trajectories of the Ries and Steinheim impacting bodies. From impact experiments, the asymmetry of the Steinheim crater and the arrangement of structural features therein are in good agreement with features produced during an oblique impact at 30° from the horizontal. The restriction of shatter cones to the eastern segment of the Steinheim Basin crater also suggests a west–east-directed trend of the impact direction, and supports previous models that favoured such impactor trajectory.

scholarly journals Evaluation of local damage to reinforced concrete panels subjected to oblique impact by soft missile

2019 ◽  
Vol 350 ◽  
pp. 116-127 ◽  
Author(s):  
Akemi Nishida ◽  
Zuoyi Kang ◽  
Minoru Nagai ◽  
Haruji Tsubota ◽  
Yinsheng Li
Keyword(s):  
Reinforced Concrete ◽  
Oblique Impact ◽  
Local Damage ◽  
Concrete Panels

scholarly journals Lorentz force induced shear waves for magnetic resonance elastography applications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Guillaume Flé ◽  
Guillaume Gilbert ◽  
Pol Grasland-Mongrain ◽  
Guy Cloutier
Keyword(s):  
Magnetic Resonance ◽  
Shear Wave ◽  
Lorentz Force ◽  
Wave Attenuation ◽  
Shear Waves ◽  
Estimation Method ◽  
Biological Tissues ◽  
Magnetic Resonance Elastography ◽  
Motion Generation ◽  
Wave Source

AbstractQuantitative mechanical properties of biological tissues can be mapped using the shear wave elastography technique. This technology has demonstrated a great potential in various organs but shows a limit due to wave attenuation in biological tissues. An option to overcome the inherent loss in shear wave magnitude along the propagation pathway may be to stimulate tissues closer to regions of interest using alternative motion generation techniques. The present study investigated the feasibility of generating shear waves by applying a Lorentz force directly to tissue mimicking samples for magnetic resonance elastography applications. This was done by combining an electrical current with the strong magnetic field of a clinical MRI scanner. The Local Frequency Estimation method was used to assess the real value of the shear modulus of tested phantoms from Lorentz force induced motion. Finite elements modeling of reported experiments showed a consistent behavior but featured wavelengths larger than measured ones. Results suggest the feasibility of a magnetic resonance elastography technique based on the Lorentz force to produce an shear wave source.

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