Dear all,

Thank you for your support and help.

I am modelling Rc slab strengthened from the bottom by CFRP laminates in the two directions.

My question is that i want to edit all the contacts between the concrete slab and the CFRP laminates by changing them from perfect connection to contact gap

Is there any option or technique to select all the contacts and modify their properties by one order only, or i had to modify each single contact. The number of contacts are 1240 contacts very large number