Eddy currents in thick laminations

[Douglas@xxxxxxxxxxxxx]

Problem:

How does one approach determining the eddy-current losses in 
a "laminated material" with a thickness of several millimeters and 
where the frequency under consideration is greatly above the more 
usual 50-60Hz range. Surely the skin depth must now become an issue, 
as the lamination is no longer a "thin" conductor with uniform 
current density. The simpler (freshman textbook type) formulas no 
longer apply? Any pearls of wisdom would be most appreciated.

Douglas Stevenson