What is the dilation angle for EPS Foam

[___obviously]

Hello everyone hope you're all fine during these tough times. I wanted to know what dilation angle of EPS foam will be. I had searched on internet and referred books but I could not find any information related to dilation angle of EPS foam. What value of dilation angle can I select for EPS foam?
Thankyou!

 

[BridgeSmith]

I've specified some elasticized EPS foam on a couple of occasions, but I don't know what the "dilation angle" is or what it's used for in the design.

Rod Smith, P.E., The artist formerly known as HotRod10

 

[EireChch]

Dilation angle is generally related to soil. A soil that is tightly packed such as a dense sand or over consolidated clay will dilate (increase in volume) when it is sheared.

The opposite is contraction which is applicable to loose sand and NC Clay. When sheared it will decrease in volume.

I dont know if EPS will contract or dilate when sheared however it, or what friction angle I would assign (if any). I imagine it does have some sort of friction angle but not sure of the practical use.

This sounds like you are trying to model EPS in software? Whats you end goal?

 

[dik]

didn't know that... thanks...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[EireChch]

Dik, yes its interesting. The dilation also causes a negative pore pressure in OC clays. This can be evident when undertaking CPTs and dissipation tests. The test will start negative and then eventually rise to a positive value then drop with dissipation.