Wyb
Mechanical
- Oct 12, 2009
- 9
I'd like to model a viscoelastic material in Prony series terms in Abaqus 6.9-2.
I have DMA measurements (shear loss and shear storage moduli vs frequency) for various viscoelastic materials in terms of frequency Prony series, so g_i's and tau_i's.
In Abaqus, I create a material in terms of 'general' (density), 'mechanical\elasticity\elastic' (Young's modulus and Poisson's ratio) and 'mechical\elasticity\viscoelastic' (g_i and tau_i).
What do I need to fill in for the Young's modulus, the G_0 (capital G, loss modulus is defined as G_s(omega) = G_0*[1-sum etc)? Or is the Young's modulus G_0/3 or...? I assume Poisson's ratio is almost 0.5, but can I derive that from the DMA measurements?
Finally, I'm not sure what I need to fill in for the k_i's ('mechical\elasticity\viscoelastic')? Zeros?
Thank you in advance for your response!
I have DMA measurements (shear loss and shear storage moduli vs frequency) for various viscoelastic materials in terms of frequency Prony series, so g_i's and tau_i's.
In Abaqus, I create a material in terms of 'general' (density), 'mechanical\elasticity\elastic' (Young's modulus and Poisson's ratio) and 'mechical\elasticity\viscoelastic' (g_i and tau_i).
What do I need to fill in for the Young's modulus, the G_0 (capital G, loss modulus is defined as G_s(omega) = G_0*[1-sum etc)? Or is the Young's modulus G_0/3 or...? I assume Poisson's ratio is almost 0.5, but can I derive that from the DMA measurements?
Finally, I'm not sure what I need to fill in for the k_i's ('mechical\elasticity\viscoelastic')? Zeros?
Thank you in advance for your response!