, Volume 19, Issue 2, pp 179-182

Measurements of compression creep of wood at humidity changes

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Uniaxial compression creep tests of tubular spruce specimens loaded in uniaxial compression are reported. The relative humidity in the interior of the tube is varied in a controlled manner. The results indicate that creep is greatly increased in magnitude by simultaneous humidity changes of either sign.

Thanks are due to Dr. John Zahn of Forest Products Laboratory, Madison, Wisconsin, for various helpful advice, as well as for arranging the manufacture of test specimens in his laboratory. Thanks are also due to Forest Products Laboratory of the U.S. Department of Agriculture, Madison, Wisconsin, for funding a large part of this work under subcontract FP-81-0389.