Non-linear material properties in Creo Simulate?

Hello,

I have been using Creo Simulate 2.0 for a few months for linear static structural analysis of plastic parts.

Now I want to move on to non-linear analysis.

I am facing difficulties in understanding how Creo Simulate sets the non-linear material properties.

The plastic I am using is brittle in nature.

Following are the engineering values available from the vendor's material data sheet:

Young's Modulus = 7GPa

Stress at break = 115MPa

Strain at break = 2.6%

Flexural strength = 176MPa (Where do I put this value?)

Yield Strength is not available. So assuming = 70MPa

Here is what I put in Creo Simulate:

I have some questions:

1. Whatever I have done, is that right?

2. How do I see the entire stress strain curve for the material?

3. Does Simulate maintain tangency between the linear and non-linear curves?

4. Is there any significant difference in computation time between the 3 types of curves?

5. Does Simulate use the Yield Strength value for any type of simulation? In the sense that if I take the Yield strength value much lower than it is but maintain the same stress-strain curve, will it affect the results anyhow?