Volume 7
Issue 1
Wood Technology
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume7/issue1/wood/abs-02.html
BENDING CREEP BEHAVIOUR OF OSB LOADED IN THE PLANE OF THE PANEL
Bartosz Pałubicki, Ryszard Plenzler
ABSTRACT
The flexural creep behaviour of oriented strandboards OSB/3 10 mm thick was investigated for a period of 72 days. The samples divided into two series were loaded in the plane of the panel in 4-point bending under four stress levels: 30, 40, 50 and 60% of MOR (modulus of rupture). Values of rheological constants were calculated using the 3-element rheological model. Deflections increased about linearly with respect to stress level up to 50% of MOR. The creep process of samples tested at stress level of 60% of MOR was rather nonlinear. Many samples tested at this stress level failed before the experiment was completed.
Key words: oriented strandboard, creep, creep compliance, bending, rheological constants, isochronous lines, linearity..