Both models distinguish between loading and unloading regimes in which a modulus function is used in the loading case, whereas in the unloading part, the modulus is constant and its value is that at which a switch from loading to unloading occurs.
All the constants and modulus functions can be obtained from the experimental data of the stepped creep and recovery tests (Fig.
Consider the kernel r associated with the modulus function M and let
mn], then any modulus function f and a non-negative RH-regular summability matrix method A, then [[chi].
If a modulus function f is eventually concave then [d.
As mentioned in the introduction, in this section we will generalize the results in , which can be retrieved by considering in our results the modulus function f(x) = x.
DETERMINATION OF MATERIAL CONSTANTS AND MODULUS FUNCTION
On some new generalized difference double sequence spaces defined by modulus functions
Misra, The semi normed space defined by a double gai sequence of modulus function
, Fasciculi Math.
If convexity of Orlicz function M is replaced by subadditivity of M, then this function is called modulus function
, defined by Nakano  and further discussed by Ruckle  and Maddox  and many others.
Tripathy, On some generalized new type difference sequence spaces defined by a modulus function
in a seminormed space, Fasciculi Mathematici, 40(2008), 15-24.
Once linearized, the modulus functions
of shear and elongation should agree with a factor of three, and it is indeed the case, except for rubbers that exhibit strain-induced crystallization and strain-induced association (refs.