Creeping of wood and wood-based materials

Results of tests of beech and fir-wood, chip-board and plywood behavior under permanent static loading are presented in the report. The test was affected in conformity with the established plan of experiments in testtubes of standard sizes at bending stress by concentrated force of 500 N and 1000 N. For each of the tested materials approximate elongation (ɛ) is determined for the period of testing of about 150 hours. The results obtained have been represented numerically and graphically and approximated by function ɛ(t) =  ɛ0 + ɛk * tn. Determination index r² for the tested materials ranges within the limits from 0,979 to 0,999.