2017 Volume 17 Issue 3 Pages 237-244
The present paper deals with an experimental study of reflection and transmission of longitudinal elastic stress pulses at a discontinuity of two dissimilar cylindrical bars. Longitudinal wave propagation experiments in bars made of two dissimilar materials and different diameters were conducted using a split Hopkinson pressure bar set-up. The effects of cross section and impedance ratios on both stress and energy reflection and transmission coefficients were examined over a limited range of both ratios. The experimental results for the stress and energy reflection and transmission coefficients were in excellent agreement with the theoretical ones from one-dimensional elastic wave theory. The limitations of the one-dimensional elastic wave theory were discussed in terms of wave dispersion.
