To find out element orientation, you can plot element orientation vector from somewhere, I cannot remember from where, nor have access to femap to check. If I remember correctly, the orientation vector is directed from first node to the fourth, or second, node and shows the x-axis direction...
Hi,
Just of the top of my head, I would say the pressure created by a displacement deltaX in a fixed volume is:
p = B*deltaX*A / V = F / A = k*deltaX / A.
Solve for spring constant k. Hope this helps you at all.
