Using Axisymmetric rigid surface contact element such as IRS21A or ISL21AT 1

[R.S]

Dear Friends,

I want to use IRS21A and ISL21AT contact elements in the contact punch, die, and blank holder with the sheet in an axisymmetric analysis of deep drawing in Abaqus. I am unsure how to utilize these elements in Abaqus CAE. Can I use them in CAE or should I add them directly to the .inp file? can these elements be used with the analytical rigid body?
I would greatly appreciate it if you could share your experience regarding this matter.

Thank you

 

[FEA way]

Why do you want to use those elements instead of regular surface-based contact ? Do you have axisymmetric elements with asymmetric deformation (CAXA/SAXA) in your model ?

 

[R.S]

I am using the CAX4T element for the deformable sheet.

 

[FEA way]

Those are regular axisymmetric solid elements, just with temperature DOF. According to the documentation, the aforementioned contact elements should be used only in 2 cases - when substructures are present and when CAXA or SAXA (asymmetric-axisymmetric) elements are used. Otherwise, regular surface-based contact should be used.

 

[R.S]

Dear friend,
Thank you for your response. Since I am using CAXA elements for the sheet in this analysis, I have to use contact elements such as IRS21A and ISL21AT. I would appreciate it if you could provide information on activating these elements in the contact of the tool and sheet.
Best wishes.

 

[FEA way]

If you are using the CAXA elements (not just the CAX4T ones) then ok. Unfortunately, due to the fact that the use of those contact elements is so uncommon, they can't be created in Abaqus/CAE so you need to use keywords. The syntax is explained in the documentation chapters "Rigid Surface Contact Elements" and "Slide Line Contact Elements" but you can also find simple examples in the chapter Verification --> Interactions --> Contact properties --> Modified contact pressure-overclosure relationship.