| 摘要 |
A method for determination of wood resistance to fatigue at twisting includes application to a sample that is rigidly fixed with one end in a fixed holder, with the other end placed in a movable holder that rotates, of multiple repetitive torsion loads due to vibrations of a piston rod fixed on it with the upper end. To the lower end of the piston rod one fixes a toothed sector that through a rod is kinematically connected to a link mechanism with possibility of bringing the piston rod to two-side vibrations with angle of inclination from equilibrium position equal to α, at that the value of angle α is controlled by value of travel of the rod. |
