What is the best nonlinear setup and control method for simulating a compression test on a part such as foam specimen?
What is the best nonlinear setup and control method for simulating a compression test on a part such as foam specimen?
Well I have a Polyurethane (PUR) foam material. The dimension is 15*15*2 in³. I have the experimental compression data. We are compressing the foam upto 80%. So I have this stress strain curve. At 50% of compression the stresses are 3700 Pa. The mass density of foam material is 35 Kg/m³.
I want to compare the experimental results with the simulation. For the same I am not able to figure out the right model to use for this kind of simulations. I started with Nonlinear Blatz-Ko model, but stuck with defining E modulus. I again try with Nonlinear Mooney Rivlin and Nonlinear Elastic, but I am not getting the relevant results.
Are you compressing it using a force or reference geometry?
By both way.
I am giving a load and check how much displacement I am getting with that load, or vice versa. So the one side is fixed and on other side I am apply either load or displacement.
It depends on how you measured your material data; can you give more details? I assume we're talking about the setup of a FEM for calibrating the constitutive model coefficients, correct?