List(List(0,0,0),List(0,0,0),List(0,0,
   (a*b*h*(fAw*fBw*gAw*gBw + (4*fAwxi*fBwxi*gAw*gBw*(d**2 + h**2/12.))/
         a**2 + (4*fAw*fBw*gAweta*gBweta*(d**2 + h**2/12.))/b**2)*mu)/4.))
