Results 221 to 230 of about 29,601 (260)

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 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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Analysis of the Relaxation Modulus of Spun Yarns

Textile Research Journal, 2009
In this paper, the relaxation modulus of a single spun yarn is modeled in terms of the relaxation modulus of the constituent fibers of the yarn. A generalized Maxwell model is employed to describe the viscoelastic characteristic function of individual fibers subject to a given step function of tensile strain.
H. Liu, X.M. Tao, K.F. Choi, B.G. Xu
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stress generation modulus as a counterpart of the stress relaxation modulus

1995
In order to measure the time dependence of the stress relaxation modulus, E, a stress-strain deformation has to precede which induces a stress within the viscoelastic sample from which the sample relaxes. The generation of stress is characterized by a strain rate-dependent and relaxation rate-dependent portion which exhibits a maximum value, E_max ...
Brückner, Rolf, Hessenkemper, Heiko, Habeck, Andreas, Yue, Yuanzheng   +3 more
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Evaluation of the stress-relaxation modulus for materials with rapid relaxation rates

Journal of Applied Physics, 1980
The stress-relaxation modulus E(t) is defined in terms of an experiment involving an instantaneously applied strain; such experiments are, in practice, impossible. We have critically investigated several methods which have been suggested in the literature to extract E(t) from experimental stress values used to bring about a constant-strain rate ...
K. S. C. Lin, J. J. Aklonis
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Relaxation of young modulus by thermal treatment in metglas ribbons

Il Nuovo Cimento D, 1985
The Young modulus dependence on thermal treatment and magnetization state was analysed on various metallic glasses. Propagation of standing magnetoelastic waves was used as an investigation technique. A simple model was elaborated to predict the magnetoelastic coupling.
LANOTTE, LUCIANO, C. LUPONIO, F. PORRECA
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Determination of the relaxation modulus of a linearly viscoelastic material

Mechanics of Time-Dependent Materials, 2006
In this paper, a numerical method for computing the relaxation modulus of a linearly viscoelastic material is presented. The method is valid for relaxation tests where a constant strain rate is followed by a constant strain. The method is similar to the procedure suggested by Zapas and Phillips.
Joonas Sorvari
exaly   +2 more sources

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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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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Creep and stress-relaxation in ultra-high modulus linear polyethylene

Journal of Materials Science, 1984
It has been shown that the creep and stress-relaxation behaviour of oriented linear polyethylene can be satisfactorily described by a model where two thermally activated processes are acting in parallel. The creep behaviour of an oriented sample which does not reach a constant strain-rate can be described by the addition of a further plastic flow term ...
Wilding, M. A., Ward, I. M.
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