How to set non-linear Material

Altair Forum User

If today I want to set the material like Opitstruct MATS1.

 

#Problem 1

We can give table data to let it have material curve, so how can I set it in RADIOSS.

 

#Problem 2

If today I want to set the rigid body in RADIOSS, can I use the M13_Rigid?

 

#Problem 3

If my model want to let it to contact automatically like automatic_single_surface_contact in LS-DYNA.

(Just like I don't set any contact surface, just choose the parts then it will have the behavior of contact)

Altair Forum User

Hi,

We can give table data to let it have material curve, so how can I set it in RADIOSS.

For an elasto-plastic material you can use /MAT/LAW2 or /MAT/LAW36. If the user is having a stress-strain curve use /MAT/LAW36. Create the function usinig curve editor (XYPlots>>Curve editor) and in the material card recall this function as shown below. Please note that the stress-strain curve should have post yield values.  Also,the first point of yield stress functions (plastic strain vs stress) should have a plastic strain value of zero. As an example, If the yield value is 90, the curve starts with 

X      Y

0      90

 

 

 

f today I want to set the rigid body in RADIOSS, can I use the M13_Rigid?

 

For rigid bodies always use /MAT/LAW1. /MAT/LAW13 is an obsolete card now.

 

If my model want to let it to contact automatically like automatic_single_surface_contact in LS-DYNA.

 

As in Dyna you can create a self/global contact in RADIOSS using the Type 7 contact. Select the master and slave as the same and a self contact between them will be established.