Sheldon Imaoka
Ansys Employee

Hi oumaimalahmar.ol,

How are nodes I and J for your COMBIN39 defined?  Please note that positive displacement of node J relative to node I puts the element in tension, so maybe your definition of nodes I and J are flipped?  This can be sometimes tricky since nodes I and J are usually coincident, so please check which one you have as grounded (constrained) and which one is tied to the shells.