Effects of diffraction on stress pulse propagation

1978 ◽  
Vol 64 (1) ◽  
pp. 250-256 ◽  
Author(s):  
M. R. Layton ◽  
E. F. Carome ◽  
H. D. Hardy ◽  
J. A. Bucaro
Keyword(s):  
Pulse Propagation ◽  
Stress Pulse

Stress‐pulse propagation in solids: a closer look at dispersion

1972 ◽  
Vol 21 (11) ◽  
pp. 532-534 ◽  
Author(s):  
M.P. Felix ◽  
A.T. Ellis
Keyword(s):  
Pulse Propagation ◽  
Stress Pulse

Computer Simulation of Axial Stress Wave System in Finite-Length Specimens

1992 ◽  
Author(s):  
Jacky C. Prucz
Keyword(s):  
Pulse Propagation ◽  
Axial Stress ◽  
Pulse Method ◽  
Rectangular Pulse ◽  
Wave System ◽  
Impact Pulse ◽  
Inertia Effects ◽  
Stress Pulse ◽  
Shaped Pulse ◽  
Propagation Technique

Abstract A complete damping-stiffness characterization of a given medium can be derived from the development of a propagating stress pulse between two fixed locations. The extensional stiffness is determined by the phase velocity, whereas the damping is measured by the pulse attenuation [1]. Thus far this approach has been limited to axial impact of long, slender rods. The multiple frequency content of a rectangular-pulse restricts the test specimens to slender rods or fibers in order to avoid pulse dispersion as a result of lateral inertia effects [2]. An improved stress pulse method for more realistic damping measurements in a broader range of test specimens has been developed recently [3]. It is referred to as the “Sine-Pulse Propagation” technique since the commonly used impact pulse is replaced by a sine-shaped pulse, which usually contains one full cycle. Its main advantage as compared to traditional methods for damping characterization, such as the “Hysteresis Loop” approach, is that it minimizes the loss of vibratory energy in the testing apparatus, which is the main contaminating form of conventional damping data [4].

Erratum: ’’Effect of diffraction on stress pulse propagation’’ [ J. Acoust. Soc. Am. 64, 1692−1699 (1978)]

1979 ◽  
Vol 65 (5) ◽  
pp. 1342-1342
Author(s):  
M. R. Layton ◽  
E. F. Carome ◽  
H. D. Dardy ◽  
J. A. Bucaro
Keyword(s):  
Pulse Propagation ◽  
Stress Pulse

Pulse Propagation in a Poroelastic Solid

1969 ◽  
Vol 36 (4) ◽  
pp. 878-880 ◽  
Author(s):  
John Paul Jones
Keyword(s):  
Pulse Propagation ◽  
Substantial Reduction ◽  
Saturated Soil ◽  
Poroelastic Medium ◽  
Stress Pulse ◽  
Infinite Region ◽  
Sharp Front

The problem of a stress pulse applied to a semi-infinite region of a poroelastic medium is examined to determine the effect of a stress pulse on equipment located underground. If dissipation is neglected, an applied step pulse splits into two pulses that propagate unchanged in shape, each moving at one of the dilatational speeds of the medium. If dissipation is included, the step pulse splits into a “smeared-out” component and a component that retains the sharp front. The latter component travels at a speed that would occur if the fluid and solid were locked together. It is concluded that linear poroelastic dissipative mechanisms are insufficient in themselves to yield a substantial reduction in accelerations for equipment buried in a saturated soil.

Nonlinear Pulse Propagation and Modulation Instability in Periodic Media with and without Defects

PIERS Online ◽  
2006 ◽  
Vol 2 (2) ◽  
pp. 177-181
Author(s):  
V. Grimalsky ◽  
Svetlana Koshevaya ◽  
Javier Sanchez-Mondragon ◽  
Margarita Tecpoyotl Torres ◽  
J. Escobedo Alatorre
Keyword(s):  
Pulse Propagation ◽  
Modulation Instability ◽  
Periodic Media ◽  
Nonlinear Pulse Propagation
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