Patent ID: 6519536
Filing Date: 2003-02-11
Classification: G01N

Abstract:
A method for determining behavior of a viscoelastic material at a first temperature, comprising:performing five or more measurements of a dynamic parameter as a function of deformation at each of at least a second, third, and fourth temperature; choosing from the measurements eleven or more data points, wherein each data point comprises a value of the dynamic parameter, an associated deformation, and an associated temperature; determining values of parameters a, b, c, q1, q2, d1, e1, f1, d2, e2, and f2 by inserting at least eleven of the data points into a first equation P&it;(q,T)=a*T2+b*T+c+â€ƒ&it;(d1*T2+e1*T+f1)*e-â€ƒ&it;qq1+â€ƒ&it;(d2*T2+e2*T+f2)*e-â€ƒ&it;qq2in which P represents the value of a respective dynamic parameter, q represents the associated deformation, and T represents the associated temperature; inserting the first temperature and the values of the parameters a, b, c, q1, q2, d1, e1, f1, d2, e2, and f2 into the first equation; and approximating the dynamic parameter as a function of the deformation at the first temperature using the first equation.