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Geometric Effects on Stress Wave Propagation
Journal of Biomechanical Engineering, 2014The present study, through finite element simulations, shows the geometric effects of a bioinspired solid on pressure and impulse mitigation for an elastic, plastic, and viscoelastic material. Because of the bioinspired geometries, stress wave mitigation became apparent in a nonintuitive manner such that potential real-world applications in human ...
K L, Johnson +7 more
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1994
It is a guiding principle of-brittle fracture that a crack always propagates essentially perpendicularly to the direction of the maximum principal tensile stress. This implies that a crack will change its direction of propagation if the direction of the actual maximum principal tensile stress changes.
H. G. Richter, F. Kerkhof
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It is a guiding principle of-brittle fracture that a crack always propagates essentially perpendicularly to the direction of the maximum principal tensile stress. This implies that a crack will change its direction of propagation if the direction of the actual maximum principal tensile stress changes.
H. G. Richter, F. Kerkhof
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Laser Generation of Stress Waves in Metal
Surface and Coatings Technology, 1995Laser-shock surface treatment can create plastic strains and induce compressive residual stresses in metals. This process consists in irradiating a metallic sample with a short but intense laser pulse. As a consequence, a high temperature and pressure plasma is created at the sample surface.
Jean-Eric Masse, Gérard Barreau
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Shock Waves in the Treatment of Stress Fractures
Ultrasound in Medicine & Biology, 2009In soccer players, lower extremity stress fractures are common injuries and are the result of repetitive use damage that exceeds the intrinsic ability of the bone to repair itself. They may be treated conservatively but this may cause long-term complications, such as delayed union, muscle atrophy and chronic pain.
MORETTI, Biagio +6 more
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2012
Abstract Gravity waves that account for most of the vertical transport of energy and momentum in the atmosphere are on horizontal scales smaller than the horizontal grid sizes of numerical prediction models. Thus, these waves and their important contributions to the general circulation cannot be resolved.
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Abstract Gravity waves that account for most of the vertical transport of energy and momentum in the atmosphere are on horizontal scales smaller than the horizontal grid sizes of numerical prediction models. Thus, these waves and their important contributions to the general circulation cannot be resolved.
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Asymmetric wave-stress tensors and wave spin
Journal of Fluid Mechanics, 1973Linearized wave-stress tensors derived from Hamilton's variational principle may be asymmetric. If interpreted as momentum fluxes, they would lead to lack of conservation of orbital angular momentum. It is shown that changes in internal angular momentum or spin of waves and torque coupling to external fields can adequately provide conservation of total
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Stress Wave Propagation in Rods and Beams
1958Publisher Summary The problem of the response of structures to dynamic loading is of great importance in a wide variety of technical applications. The loading of a structure can be classified broadly from the viewpoint of time variations. The dynamic loads themselves may be of widely differing kinds depending on the total duration of the pulse, the ...
Abramson, H. N. +2 more
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Speed of stress wave propagation in lung
Journal of Applied Physiology, 1986The speed of stress waves in the lung parenchyma was investigated to understand why, among all internal organs, the lung is the most easily injured when an animal is subjected to an impact loading. The speed of the sound is much less in the lung than that in other organs.
R T, Yen +4 more
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Thermal Attenuation of Nonlinear Stress Waves
Journal of Applied Physics, 1960The work of Knopoff and MacDonald (1958) on the attenuation of nonlinear stress waves in solids has been extended to include thermal losses. The damping of a nonlinear stress wave is completely describable in terms of two attenuation coefficients, a ``mechanical'' coefficient α1, and a ``thermal'' coefficient α2.
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On stress wave interactions in liquid impact
Wear, 2005There are many situations in which the impact of a liquid jet is of importance. Such an event induces stress fields that interact to apply localized compressive or tensile loading to the targets impacted. Initially, the surface sees compression, but, after a short time, tensile forces are also experienced.
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