altairjonathan
Mechanical
- Oct 27, 2011
- 1
Hi!
I am trying to model heat generation in LDPE due to mechanical oscillations. I'm running Abaqus/Standard 6.11 and running the oscillations using a periodic curve.
The material is *Hyperelastic, *Viscoelastic and I'm using the *Inelastic heat fraction to generate the heat from the viscoelastic dissipation.
The *inelastic heat fraction card requires that you use time domain viscoelasticity and i have frequency domain data (i.e. Loss and Storage modulus).
I know there are ways of turning these into prony series parameters but I'm wondering if there are no better way of doing this?Since its very high frequency I'm also trying to scale the problem by running on a tenth of the energy .. (i.e. frequency/10 cond/10 density/10 and also I'm guessing relaxation time/10 if using prony).
I am very new to FEA and some pointers would be great. Is it a good approach? How would you handle the constitutive models? how would you scale the problem?
Thank you very much!
Jonathan
I am trying to model heat generation in LDPE due to mechanical oscillations. I'm running Abaqus/Standard 6.11 and running the oscillations using a periodic curve.
The material is *Hyperelastic, *Viscoelastic and I'm using the *Inelastic heat fraction to generate the heat from the viscoelastic dissipation.
The *inelastic heat fraction card requires that you use time domain viscoelasticity and i have frequency domain data (i.e. Loss and Storage modulus).
I know there are ways of turning these into prony series parameters but I'm wondering if there are no better way of doing this?Since its very high frequency I'm also trying to scale the problem by running on a tenth of the energy .. (i.e. frequency/10 cond/10 density/10 and also I'm guessing relaxation time/10 if using prony).
I am very new to FEA and some pointers would be great. Is it a good approach? How would you handle the constitutive models? how would you scale the problem?
Thank you very much!
Jonathan