Can twist be removed from carved panels?

My wife has been carving 2 16x32" panels made from 7/8" cherry that was air dried to <5% residual moisture in my basement. After 2 years of work the panels have developed ~1/2" of twist along their length. These panels were originally to be floating panels in door frames for a large cabinet. Can they be fixed? I assured her that the panels were flat when they were glued up.(I did the gluing ;-}) Is there a way to avoid this in the future?
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Sometimes wood is harder on the surface that it is inside (case hardening) so that removing material from one face releases internal stresses warping the board.
So if the panel really was dried to stability and is still at the same moisture content now as then, maybe this was case- hardening.
It may be possible to straighten it by moistening the wood and clamping it flat, then letting it dry again while clamped. My parents did that to straight out exposed ceiling beams that warped from plastering between them.
It may also help to remove some wood from the back of the panels, especially where it is thickest or convex on the back.
It would be a good idea to talk with a few other carvers too.
--
FF


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Bill Judt has a very good article on gluing panels for just this purpose. Try woodcarver.com.....I think that is his web site. If not, then google his name.
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