Hello all; I am looking for material properties for some viscoelastic materials, specifically ones that I need to input into ANSYS for analysis.(adsbygoogle = window.adsbygoogle || []).push({});

More specifically these are the quantities that I'm looking for:

Shear Relaxation Kernel Function

[tex] G(\xi) = G_{\infty} + \sum^{n_G}_{i=1} G_i e^{(-\xi / \lambda^G_i)} [/tex]

Bulk Relaxation Kernel Function

[tex] K(\xi) = K_{\infty} + \sum^{n_K}_{i=1} G_i e^{(-\xi / \lambda^K_i)} [/tex]

[tex]G_i = C_i (G_0 - G_{\infty}) [/tex]

[tex]K_i = D_i (K_0 - G_{\infty}) [/tex]

Where [tex]\xi[/tex] is the reduced or pseudo time

n_G = number of Maxwell elements used to approximate the shear relaxation kernel

n_K = number of Maxwell elements used to approximate the bulk relaxation kernel

C_i = constants associated with the instantaneous response for shear behavior

D_i = constants associated with the instantaneous response for bulk behavior

G_0 = initial shear modulus

G_infinity = final shear modulus

K_0 = initial bulk modulus

K_infinity = final bulk modulus

[tex]\lambda^G_i[/tex] constants associated with a discrete relaxation spectrum in shear

[tex]\lambda^K_i[/tex] constants associated with a discrete relaxation spectrum in bulk

I've read up a little on the Maxwell model, and I really only need one element; but I'm way over my head. I really have no idea where to start.

I could really use some help, thanks.

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# Viscoelastic Material Properties

Can you offer guidance or do you also need help?

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