FIELD: test technique. SUBSTANCE: housing accommodates drive that has electric motor, reduction gear, and slider-crank mechanism designed to set platform in reciprocal motion and to compress spring placed in blind hole of platform. Hole walls have longitudinal slits. Slider with projections placed in hole engages slits. Fixed to platform is shell with inertia weight used for engagement with lever whose other arm is in contact with specimen mounted in stop grip. In its movement, slider accelerates platform which creates impact compression as it meets specimen; then inertia weight creates impact bending in specimen through lever. In its further motion, slider compresses spring which imparts compression load to specimen via platform. In its reverse movement, slider releases specimen and platform returns to initial position by its projections. EFFECT: improved reliability of test results. 1 dwg
