Results 261 to 270 of about 174,304 (299)

Experimental Measurement of Dynamical Young's Modulus and Shear Modulus of Low-Impedance Materials

Key Engineering Materials, 2004
A new dynamical measurement technique that combines PVDF film piezoelectric gages with resistor strain gages in conventional SHPB is developed to study the dynamical mechanical behavior of low-impedance aluminum foam. The average value of the stresses measured by PVDF gages from the front face and the back face of the specimen at each time is taken as ...
Shao Chiu Shih, Yong Zhong Wang, Bing Yu, Li Li Wang   +3 more
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The Dynamic Shear Modulus of Bone in Dependence on the Form

1979
Torsional testing of fresh cortical bovine bone showed highly divergent shear moduli at various sites in the middle part of the diaphysis of the right metacarpus. Two hundred samples taken from twenty-five bones were investigated with a free oscillating torsional pendulum to determine the dynamic shear modulus.
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The Dynamic Shear Modulus of Paving Asphalts as a Function of Frequency

Transactions of the Society of Rheology, 1974
The deformation response of paving asphalts to small-amplitude sinusoidal loading in shear is linear and thermorheologically simple so that master curves relating the dynamic shear modulus to the (reduced) frequency can be constructed. A simple analytical expression which gives a good fit to these master curves is proposed.
E. J. Dickinson, H. P. Witt
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The dynamic shear modulus of bitumens as a function of frequency and temperature

Rheologica Acta, 1970
Thermorheological behaviour and dilatometric glass-transition temperatures have been studied on 14 samples representing the three main types of bitumen. The frequency dependence of the dynamic moduli can be described byGaussian distributions of log relaxation time. The width of the distribution depends on the type of bitumen.
R. Jongepier, B. Kuilman
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Model for Dynamic Shear Modulus of Semiflexible Polymer Solutions

MRS Proceedings, 1997
AbstractWe discuss a dynamical model for the frequency-dependent shear modulus of an entangled solution of semifexible polymers, based on longitudinal fluctuations in filaments between entanglement points or crosslinks. The goal is to explain non-Rouse, power-law scaling of the bulk shear modulus that is found via microscopic rheology of highly ...
F. Gittes, B. Schnurr, C. F. Schmidt, P. D. Olmsted, F. C. Mackintosh   +4 more
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Evaluation of Shear Modulus and Damping in Dynamic Centrifuge Tests

Journal of Geotechnical and Geoenvironmental Engineering, 2005
Correct evaluation of shear modulus and damping characteristics in soils under dynamic loading is key to both the fundamental understanding of soil behavior and the practical application of soil modeling programs. Dynamic centrifuge tests can contribute significant information about soil behavior, but great care must be taken over the signal processing
Brennan, A. J., Thusyanthan, N. I., Madabhushi, S. P. G.   +2 more
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Determination of the dynamic shear modulus and loss factor of rubber

The Journal of the Acoustical Society of America, 1980
We have recently developed a new resonance theory for the scattering of compressional waves by fluid-filled spherical cavities in viscoelastic materials, and have applied it to the study of the resonance frequencies and widths of peaks in the (monopole) f0pp scattering amplitude.
G. Gaunaurd, K. P. Scharnhorst, H. Überall   +2 more
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Model for Dynamic Shear Modulus and Damping for Granular Soils

Journal of Geotechnical and Geoenvironmental Engineering, 2000
This paper presents a simple four-parameter model that can represent the shear modulus factors and damping coefficients for a granular soil subjected to horizontal shear stresses imposed by vertically propagating shear waves. The input parameters are functions of the confining pressure and density and have been derived from a generalized effective ...
Assimaki, Dominic, Kausel, Eduardo, Whittle, Andrew   +2 more
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Determination of the Dynamic Shear Modulus of a Composite Solid Propellant

Review of Scientific Instruments, 1963
Structural analyses of large solid propellant motors subjected to an environment of transportation and handling must include the contribution of the solid propellant. More accurate propellant mechanical properties are needed for this purpose than are presently being obtained.
Lionel H. Layton, G. A. Sheppard, S. John Bennett   +2 more
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The dynamic longitudinal shear modulus and damping of carbon fibres

Journal of Physics D: Applied Physics, 1975
Results are presented of torsion pendulum measurements of the longitudinal shear modulus GLT and damping Psi LT of single carbon fibres in the frequency range 0.01-0.1 Hz. Cyclic surface shear strains up to 10-3 had no noticeable effect on either GLT or Psi LT. Both GLT and Psi LT increase in the presence of an axial tensile stress.
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