11-07-2013 дата публикации
Номер: US20130179093A1
A method of characterizing viscoelastic properties of a sample of a substance, includes the application () to the sample of an oscillatory mechanical excitation, the measurement () of a response of the sample to the mechanical excitation and the determination () of characteristic parameters of the viscoelastic properties of the sample, is characterized in that the determination () of characteristic parameters includes the steps of expressing the response in the form of a nonlinear periodic response signal, of general form x(t)=x+xcos(φ(t)−ρ), where φ(t) is the phase of the signal, and of determining viscoelasticity parameters, characterizing the nonlinearity of the response signal. 110521054105658105658. A method for characterizing the viscoelastic properties of a sample () of a substance , comprising the application () to said sample () of an oscillatory mechanical excitation (ε(t); σ(t)) , the measurement () of a response (F; D) of said sample () to said mechanical excitation (ε(t); σ(t)) , and the determination ( , ) of characteristic parameters (σ , p , r , t , a , b) of said viscoelastic properties of said sample () , characterized in that the determination ( , ) of said characteristic parameters (σ , p , r , t , a , b) comprises the following steps:{'sub': 0', '1', '0', '0, 'expressing said response in the form of a nonlinear periodic response signal (σ(t);ε(t)), of general form x(t)=x+xcos(φ(t)−p), where φ(t) is the phase of said signal and pa phase origin, and'}{'sub': 1', 'k', '0', 'k', 'k', 'k, 'determining viscoelasticity parameters (σ, r, p, t, a, b), characterizing the nonlinearity of said response signal (σ(t);ε(t)).'}81011101510331033. A system for characterizing viscoelastic properties of a sample () of a substance , comprising means () for the application to said sample () of an oscillatory mechanical excitation , means () for the measurement of a response of said sample () to said mechanical excitation , and means () for the determination of ...
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