Axial dynamic compression of tubular metallic crushers

Abstract

In studying the dynamic strength of structures and materials, the load is usually placed on test objects by rectangular or trapezoidal pressure pulses. In addition, their amplitude and duration vary over wide ranges. Such a loading pressure pulse can be obtained with impact loading through a special damper, for which the dependence of the force on the magnitude of compression has a region where the compression force is constant. Polystyrene foam is an example of a material used for such a damper [i, 3]. However, widespread use of polystyrene foam for these purposes is hampered by the instability of its strength characteristics, which decrease the reproducibility of rest results, and comparatively low strength, which limits the level of loads that are created. In this respect, tubular crushers under axial compression have more universal possibilities.