Effect of a transverse interlayer on stresses in a bar under transient loads

Abstract

1. Equations of the linear elasticity theory can be used for determining stresses in a bar with a transverse interlayer with sufficient accuracy up to stresses equal to the dynamic elastic limit. In the case of large stresses the calculation gives a considerable overestimate of the stresses relative to the actual. 2. In the case of plastic deformation of interlayers whose length is less than some critical value (2.5 mm under our experimental conditions) there occurs an equalization of the maximum stresses at the boundaries and their sharp increase with a decrease of the length of the interlayer due to the predominant effect of interference of plastic waves. For interlayers whose length is greater than the critical a major role is played by damping of the waves and decrease of phase velocity due to plastic deformation. 3. Plastic deformation of the interlayer does not change the duration of the wave propagating in the composite bar.