Results 211 to 220 of about 27,965 (266)

The Dielectric Modulus: Relaxation versus Retardation

Solid State Ionics, 1998
Abstract Experiments which access the quantity e*(ω) are usually termed dielectric relaxation methods, although e*(ω) and e(t) actually refer to dielectric retardation. The true dielectric relaxation, the modulus M(t), corresponds to the decay of the electric field under the conditions of a constant dielectric displacement.
Richert, R., Wagner, H.
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Stress Relaxation Modulus of a Commercial Glass

Journal of the American Ceramic Society, 1973
The stress relaxation modulus in compression of a container glass was investigated over a wide range of strain, time, modulus, and temperature. The glass is a linear viscoelastic liquid up to 2% strain, and the modulus is a smooth function of time, with no pseudorubbery plateau apparent down to a modulus of 10° dynes/cm
J. J. MILLS, J. L. SIEVERT
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Measurement of Young’s relaxation modulus using nanoindentation

Mechanics of Time-Dependent Materials, 2006
In a previous paper (Lu et al., Mechanics of Time-Dependent Materials, 7, 2003, 189–207), we described methods to measure the creep compliance of polymers using Berkovich and spherical indenters by nanoindentation. However, the relaxation modulus is often needed in stress and deformation analysis. It has been well known that the interconversion between
Gang Huang, Hongbing Lu
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Relaxation Modulus for Corn Endosperm in Bending

Transactions of the ASAE, 1978
ABSTRACT THE stress relaxation modulus of a viscoelastic body may be predicted by a generalized Maxwell model which, if the substance is linearly viscoelastic, may include the effects of moisture content and tem-perature. In this study, samples cut from corn horny endosperm were subjected to loading as simple beams and stress relaxation characteristics
null L. A. Balastreire, null Floyd L. Herum   +1 more
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Relaxation Modulus Model of Aged Asphalt Mixture

Journal of Highway and Transportation Research and Development (English Edition), 2015
AbstractThe asphalt mixture, AC - 13 C, is aged in an oven for five different periods, and then, stress relaxation tests are conducted at −5°C on the aged samples to study the effect of aging on the relaxation of the asphalt mixtures and to build the relaxation modulus of the asphalt mixture coupled with the aging factor.
Xiao-ge Tian, Liang-jun Liu, Fa-mei Yu, Lin He   +3 more
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Relaxation Modulus and Complex Modulus

2017
The main purpose of this chapter is to relate the relaxation modulus of bitumen through its stiffness modulus with the penetration index and the softening point of asphalt. In this chapter, the equations are derived for numerical and analytical evaluation of relaxation modulus and complex modulus of asphalt based on its stiffness modulus.
Boris Radovskiy, Bagdat Teltayev
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Measuring the Young’s Relaxation Modulus of PDMS Using Stress Relaxation Nanoindentation

MRS Proceedings, 2009
AbstractThe Young’s relaxation modulus of Polydimethylsiloxane (PDMS) film specimens was measured by the nanoindenter with a flat punch indenter. In the stress relaxation test, the initial ramp part was carefully considered to develop an accurate viscoelastic contact model. This model was used to fit the load-time data from the experimental tests.
Ping Du, Hongbing Lu, Xin Zhang
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Simultaneously obtaining the Young's relaxation modulus and shear relaxation modulus of an epoxy molding compound by using DMA

2014 IEEE 16th Electronics Packaging Technology Conference (EPTC), 2014
In this work, a methodology is developed for obtaining the Young's relaxation modulus and shear relaxation modulus simultaneously by using a single dynamic mechanical analysis (DMA) experiment. The bulk modulus is assumed as a constant and calculated by Poisson's ratio.
Dao-Long Chen, Tz-Cheng Chiu, Tei-Chen Chen, Ping-Feng Yang, Chih-Pin Hung, Jen-Kuang Fang   +5 more
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