| Abstract: | Tests regarding fatigue behavior of particle boards bonded with different glue types, the characteristics of which are given, have been carried out with a loading period of 588 days. The periodically measured deflections were compared with the initial deflection and the deflection ratiof t/f0 was determined. After a loading period of one year the best of the tested boards had doubled their initial deflection showing no essential increase of deflection until determination of tests. The worst boards reached, already after 150 days, a deflection 5 times higher than the initial one and increased it up to more than 7 times until determination of tests. The course of the deflection ratio and the respective moisture content of the boards in dependence on the surrounding climate is demonstrated. |
