antn85
Mechanical
- Jul 6, 2016
- 2
Hi guys,
I'm new here, this is my first post.
I've measured the material characteristics of an hydrogel with a rheometric sweep frequency analysis. Afterwards I fitted an hyperelastic material with a Prony series to my G' and G'' measurements over frequency. Now I'd like to simulate my set up in Abaqus applying the rotational strain and measuring the resultant torque/stress and compare it with the measured torque (from the experiment) in order to show that the material properties and fitting are valid.
if I were to simulate with Abaqus a sweep frequency oscillatory test at the rheometer (flat plate to plate configuration):
1) I would input my material characteristic, measured by the Rheometric test
2)I'd apply a rotational strain (UR3) with different time periods (for different frequencies) using the static visco step.
3) Calculate the resultant torque (this then has to match the torque measured by the rig)
Is there something wrong with my approach? The rheometer only outputs a single value of torque per frequency. I know the measured values take into account both the in-phase and out-of-phase response of the material but I'm not sure that an hyper-viscoelastic model coupled with a static visco-step would actually be enough to simulate that?
It'd be great if someone could give me some advices on this, thanks!
A
I'm new here, this is my first post.
I've measured the material characteristics of an hydrogel with a rheometric sweep frequency analysis. Afterwards I fitted an hyperelastic material with a Prony series to my G' and G'' measurements over frequency. Now I'd like to simulate my set up in Abaqus applying the rotational strain and measuring the resultant torque/stress and compare it with the measured torque (from the experiment) in order to show that the material properties and fitting are valid.
if I were to simulate with Abaqus a sweep frequency oscillatory test at the rheometer (flat plate to plate configuration):
1) I would input my material characteristic, measured by the Rheometric test
2)I'd apply a rotational strain (UR3) with different time periods (for different frequencies) using the static visco step.
3) Calculate the resultant torque (this then has to match the torque measured by the rig)
Is there something wrong with my approach? The rheometer only outputs a single value of torque per frequency. I know the measured values take into account both the in-phase and out-of-phase response of the material but I'm not sure that an hyper-viscoelastic model coupled with a static visco-step would actually be enough to simulate that?
It'd be great if someone could give me some advices on this, thanks!
A
