List(List((a*kt*rAu*rBu*sAu*sBu)/2.,0,0),List(0,(a*kt*rAv*rBv*sAv*sBv)/2.,0),
  List(0,0,(a*kt*(rAw*rBw*sAw*sBw + (4*kr*rAw*rBw*sAweta*sBweta)/(bf**2*kt)))/
    2.))
