Physicomechanical properties and creep behavior of plywood composed of fully and partially heat-treated veneers

This study investigated the effect of heat-treated veneers on the physicomechanical properties and extended creep behavior of plywood using the stepped isostress method (SSM). The results revealed that the mechanical properties of plywood composed of fully and partially heat-treated veneers were not significantly different from those of the untreated plywood. In addition, the SSM was successfully applied to constructing the plywood creep master curves. The creep resistance of the heat-treated plywood surpassed that of the untreated plywood, especially the 5T200 plywood, which also exhibited the lowest compliance values of 0.13, 0.14, and 0.15 GPa−1 at 5, 10, and 20 years, respectively.