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Dynamic Shear Modulus of Isotropic Elastomers
Macromolecules, 2004We have investigated the dynamic mechanical behavior of two cross-linked polymer networks with very different topologies: one made of backbones randomly linked along their length; the other with fixed-length strands uniformly cross-linked at their ends. The samples were analyzed using oscillatory shear, at very small strains corresponding to the linear
A. M. Squires +2 more
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Modulus reduction dynamic analysis
1985A semi-analytical method of dynamic analysis, capable of predicting both the magnitude and pattern of earthquake induced deformations, is presented. The analysis is based on a modulus reduction approach which uses a reduced modulus to simulate the softening induced in soils during cyclic loading.
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1986
In that the elastic constants, Cij, which may be used to calculate the bulk, shear, and Young’s moduli, as well as the Debye temperatures of polycrystalline materials, are related to the electronic properties and in some cases have first been calculated from principles, they form a bridge between the mechanical properties of materials and their ...
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In that the elastic constants, Cij, which may be used to calculate the bulk, shear, and Young’s moduli, as well as the Debye temperatures of polycrystalline materials, are related to the electronic properties and in some cases have first been calculated from principles, they form a bridge between the mechanical properties of materials and their ...
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Note on Biot's Dynamic Modulus
The Journal of the Royal Aeronautical Society, 1941In reference 1 Biot has given a simple and valuable formula for what he calls the “ dynamic modulus “ of a flywheel system or airscrew in terms of resonance and anti-resonance frequencies. The resonance frequencies are the natural frequencies when the systems are free, and the anti-resonance frequencies are the natural frequencies when the end of the ...
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A Practical Dynamic Modulus Testing Protocol
Journal of Testing and Evaluation, 2012Abstract The dynamic modulus test is widely accepted by pavement agencies as the critical parameter for the recently proposed mechanistic empirical design procedure and the candidate of the simple performance test to accompany the Superpave volumetric mix design process.
Xinjun Li, R. Christopher Williams
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Dynamic bulk modulus of various elastomers
Journal of Polymer Science Part B: Polymer Physics, 1990AbstractThe dynamic bulk modulus of elasticity has been measured for 14 different rubbery elastomers: three natural rubbers, five neoprenes, three polyurethanes, and one each of butyl, nitrile, and butadiene types. The measurements ranged in temperature from −10 to +40°C, at frequencies from 5 to 3000 Hz, but mostly in the range 100–1000 Hz, at 2.5 MPa
J. Burns, P. S. Dubbelday, R. Y. Ting
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Dynamic shear modulus for two-dimensional bond percolation
Physical Review B, 1988We report dynamic measurements of the shear modulus \ensuremath{\mu} of a two-dimensional bond percolation lattice model made by exciting torsional oscillations of cylindrical screens of (3--5)\ifmmode\times\else\texttimes\fi{}${10}^{3}$ bonds. Critical variables such as the correlation length and the susceptibility, calculated from cluster statistics,
, Allen, , Golding, , Haemmerle
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Dynamic on-line sensing of sheet modulus of elasticity
Conference Record of 2008 54th Annual Pulp and Paper Industry Technical Conference, 2008This paper proposes and evaluates a methodology for robust, on-line estimation of the modulus of elasticity of an elastic strip transported through a multi-span system. The estimation algorithm is based on a previously developed robust sensorless sheet tension estimation, and the computation of speed draws using 1024-pulse encoders operating in 4x mode.
M.A. Valenzuela +2 more
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Dynamic modulus and damping in graphite composites
Polymer Engineering & Science, 1973AbstractBars made from graphite reinforced resin were impact loaded and foil strain gages were used to determine the characteristics of the stress wave as it propagated along the length of the specimen. Assuming one dimensional wave theory to be valid, values for the dynamic moduli were determined and these were compared to static values obtained from ...
W. L. Fourney, J. G. Poesch
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The dynamic shear modulus of marine sediments
The Journal of the Acoustical Society of America, 1988The dynamic shear modulus of marine sediments (μ) as a function of overburden pressure (p) and voids ratio (e) can be represented approximately by the expression μ=μ0(p/p0)n ×exp(−Γe), where μ0, n, and Γ are constants. Available laboratory results for sands, silts, and clays over a pressure range of 24 to 700 kPa and a voids ratio range of 0.35 to 1.5 ...
G. M. Bryan, R. D. Stoll
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