Composite coupon test in Optistruct

Altair Forum User

Hey Guys!

 

I have experimental data for composite tension compression and bending (3-point and 4-point) due to my university and I want to make a material card that can describe all of the mentioned test (and behavior) with proper accuracy.

 

I would like to make tension, compression and bending (3-point and 4-point) test in Optistruct but I haven't make coupon test before. In the real tests the loads (movement of the clamping jaws) move at constant velocity. I have no experiment how to model such kind of load in Optistruct.

 

I think there should be some non-linearity in the test because of the large displacement. How should I properly model such kind of problem? Do you have any experiment in modeling with velocity load in Optistruct?

A further problem will be the bending tests where I think I should use contact surface to model the geometry of the bending machine tool's head. In Optistruct I used slide contact before, but it didn't work to well because of large displacement. Is it possible the handle open gap contact and make the 3-point/4-point bending in Optistruct? 

 

If you have any model for bending and tension and compression could you share with me? I would like to study the pre-process method to understand the nature of the coupon test in Optistruct.

 

Thank you for your help and advise in advance!

Best regards,

Tüki

Altair Forum User

Hi,

 

I will check and get back to you ASAP... But I don't think OptiStruct supports non-linearity for material for Ortho material types.

 

You can prefer RADIOSS for this. 

Altair Forum User

Altair Forum User said:

Hi,

 

I will check and get back to you ASAP... But I don't think OptiStruct supports non-linearity for material for Ortho material types.

 

You can prefer RADIOSS for this. 

Hi Prakash,

 

Thank you for your support and help. 

 

Is it possible to apply displacement for load in Optistruct?

In RADIOSS I saw a tutorial for 3-point bending so it would be perfect for me but later I want to use my material card to calculate some linear static problem on more complex composite structure. That's why I would like to use Optistruct in first place.
Is it recommended to use RADIOSS for material card validation/creation and use that material card in Optistruct? What do you think the overlap of these two solvers?

Thanks for your help in advance!

Best regards,

Tüki

Altair Forum User

HI,

 

I think you can do that. But again as I said RADIOSS has options for the nonlinear parameters