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Re: What causes cracksq

Author: Dee
Date: 2003-03-27 01:32

If you look up the coefficient of thermal expansion of wood and calculate the stresses due solely to thermal expansion and contraction, the force is far too small to crack the wood. The changes in the dimensions are nearly indetectable. However hidden flaws in the wood could lead to cracking even with insignificant forces. If it has these flaws, even bumping it lightly could cause it to crack even if completely protected from temperature changes.

Humidity is an entirely different story. The fluctuation can cause major contraction and swelling of the wood to the point where the rings are loose enough to fall off. This degree of change could generate rather large stresses in the wood.

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