The Influence of Temperature on Creep in Wood

Creep and creep recovery tests in bending were conducted on eastern white pine, western redcedar, and sugar maple. Six specimens from each species were all side-matched and machined to 1 by 2 by 30 centimeters with the 2-centimeter faces roughly tangent to the growth rings. When tested, the specimens were supported as simple beams over a span of 2-centimeters with the 2-centimeter dimension being the width of the beam. The mass of the constant load was 6,196 grams, which resulted in extreme fiber stresses on the order of one-half the stress at proportional limit or less for the species tested. Tests were made at different temperatures over the range of 20?C to 60?C. Small increases in the slopes of the recovery curves were noted at temperatures up to 50?C, with large change occurring between 50?C and 60?C. The non-recoverable component of strain was non-Newtonian.

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