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Dynamic modulus measurement using the Dynamic Mechanical Analyzer
The Journal of the Acoustical Society of America, 2006The Navy has used the Dynamic Mechanical Thermal Analyzer (DMTA) as a tool to characterize material properties over the last 20 years. It is now evaluating the Dynamical Mechanical Analyzer (DMA) as a replacement for the DMTA, with the goal to insert it into operation in 2006 with minimal disruption to current acquisition programs.
Kin Ng, Richard Deigan, Samedi Koch
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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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Calibration of dynamic modulus predictive model
Construction and Building Materials, 2016Abstract The aim of the present study is the evaluation of the Witczak 1-37A, Bari & Witczak, NCHRP 1-40D and Hirsch models for the estimation of dynamic modulus ( E ∗ ) and the subsequent calibration of the model to best fit with laboratory reference data of the material under investigation.
Konstantina Georgouli +2 more
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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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On measurement of dynamic modulus for bituminous mixtures
International Journal of Pavement Engineering, 2017The AASHTO:TP-79 (2010), Standard method of test for determining the dynamic modulus and flow number for hot mix asphalt using the asphalt mixture performance tester (AMPT) stipulates the test proc...
S. Deepa +2 more
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Modulus reduction dynamic analysis
2010A 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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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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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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Dynamic Modulus for Reinforced Concrete Beams
Journal of Structural Engineering, 1984The modulus of elasticity of concrete given by ACI Code 318-83 is thought of as secant modulus under static loads. It is more appropriate to use modulus of elasticity of concrete measured by a dynamic system, where dynamic loads are involved. The transverse vibration and elastic wave propagation methods are used to get the dynamic elastic modulus.
Sukhvarsh Jerath, Milad M. Shibani
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