Shear waves and shocks in soft solids

2007 ◽  
Vol 75 (1) ◽  
Author(s):  
Hervé Tabuteau ◽  
Darek Sikorski ◽  
John R. de Bruyn
Keyword(s):  
Shear Waves ◽  
Soft Solids

Parametric excitation of shear waves in soft solids

2009 ◽  
Vol 55 (4-5) ◽  
pp. 567-574 ◽  
Author(s):  
M. A. Mironov ◽  
P. A. Pyatakov ◽  
I. I. Konopatskaya ◽  
G. T. Clement ◽  
N. I. Vykhodtseva
Keyword(s):  
Parametric Excitation ◽  
Shear Waves ◽  
Soft Solids

Modeling of nonlinear shear waves in soft solids

2004 ◽  
Vol 116 (5) ◽  
pp. 2807-2813 ◽  
Author(s):  
Evgenia A. Zabolotskaya ◽  
Mark F. Hamilton ◽  
Yurii A. Ilinskii ◽  
G. Douglas Meegan
Keyword(s):  
Shear Waves ◽  
Soft Solids ◽  
Nonlinear Shear

scholarly journals Numerical Simulation of Focused Shock Shear Waves in Soft Solids and a Two-Dimensional Nonlinear Homogeneous Model of the Brain

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
B. Giammarinaro ◽  
F. Coulouvrat ◽  
G. Pinton
Keyword(s):  
Shock Wave ◽  
Numerical Methods ◽  
Shock Waves ◽  
Scaling Laws ◽  
Soft Tissues ◽  
Shear Waves ◽  
Homogeneous Model ◽  
Nonlinear Propagation ◽  
Soft Solids ◽  
The Brain

Shear waves that propagate in soft solids, such as the brain, are strongly nonlinear and can develop into shock waves in less than one wavelength. We hypothesize that these shear shock waves could be responsible for certain types of traumatic brain injuries (TBI) and that the spherical geometry of the skull bone could focus shear waves deep in the brain, generating diffuse axonal injuries. Theoretical models and numerical methods that describe nonlinear polarized shear waves in soft solids such as the brain are presented. They include the cubic nonlinearities that are characteristic of soft solids and the specific types of nonclassical attenuation and dispersion observed in soft tissues and the brain. The numerical methods are validated with analytical solutions, where possible, and with self-similar scaling laws where no known solutions exist. Initial conditions based on a human head X-ray microtomography (CT) were used to simulate focused shear shock waves in the brain. Three regimes are investigated with shock wave formation distances of 2.54 m, 0.018 m, and 0.0064 m. We demonstrate that under realistic loading scenarios, with nonlinear properties consistent with measurements in the brain, and when the shock wave propagation distance and focal distance coincide, nonlinear propagation can easily overcome attenuation to generate shear shocks deep inside the brain. Due to these effects, the accelerations in the focal are larger by a factor of 15 compared to acceleration at the skull surface. These results suggest that shock wave focusing could be responsible for diffuse axonal injuries.

Parametric Excitation of Shear Waves in Soft Solids

2008 ◽  
Author(s):  
Mikhail Mironov ◽  
Irina Konopatskaya ◽  
Pavel Pyatakov ◽  
Gregory Clement ◽  
Natalia Vykhodtseva ◽  
...  
Keyword(s):  
Parametric Excitation ◽  
Shear Waves ◽  
Soft Solids

Imaging of shear waves induced by Lorentz force in soft solids

2013 ◽  
Author(s):  
Pol Grasland-Mongrain ◽  
Stefan Catheline ◽  
Remi Souchon ◽  
Florian Cartellier ◽  
Ali Zorgani ◽  
...  
Keyword(s):  
Lorentz Force ◽  
Shear Waves ◽  
Soft Solids

Micro-elastography: Toward ultrasonic shear waves in soft solids

2021 ◽  
Vol 118 (11) ◽  
pp. 113701
Author(s):  
G. Laloy-Borgna ◽  
A. Zorgani ◽  
S. Catheline
Keyword(s):  
Shear Waves ◽  
Soft Solids ◽  
Ultrasonic Shear
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