Although the subject of wave propagation in solids has a long history, the classical theory of elastic waves having been developed in the nine teenth century by STOKES, POISSON, RAYLEIGH and KELVIN, the last two decades have seen a remarkable revival of interest in this subject among both theoreticians and experimenters. There' are a number of reasons for this; first, experimental methods for the generation and detection of high frequency mechanical waves have become available only with the advent of electronic techniques and of high speed photo graphic recording apparatus. Secondly, the appearan

Inhalt
Some Dynamical Applications of Shock Wave Propagation in Solids.- Propagation of Plane Shock Waves in a Stress-Relaxing Medium.- Précurseurs élastoplastiques d'ondes de choc en milieu solide isotrope.- Propagation of Magnetoelastic Disturbances in Viscoelastic Bodies.- On the Numerical Solution of a Wave Propagation Problem in the Theory of Dislocation Motion.- Vibrations d'une structure lamellaire sous fluage localisé.- Dynamics of an Anelastic String of Variable Length.- Anelastic Waves in Thin Plates.- Some Experimental and Theoretical Studies on the Propagation of Longitudinal Plastic Waves in a Strain-Rate-Dependent Material.- Some Problems of the Mechanics of Extensible Strings.- Mechanical Waves and Strain-Rate Effects in Metals.- The Propagation of Small Amplitude Elastic-Plastic Waves in Pre-Stressed Cylindrical Bars.- The Initiation of Finite Amplitude Waves in Annealed Metals.- Visualisation of Wave Propagation in Impulse-Loaded Bars.- Transient Stress Wave Boundary Interactions.- Reflection of a Plastic Wave at an Obstacle.- A Simple Viscoelastic Analogy for Stress Waves.- An Example of the Influence of Yield on High Pressure Wave Propagation.- Pulse Propagation in a Viscoelastic Solid with Geometric Dispersion.- Some Dynamic Characteristics of Rocks.- On Some Simplifications in the Description of the Motion of a Soft Soil.- One-Dimensional Inelastic Wave Propagation in Soils: Experimental and Theoretical Investigations.- Propagation des surfaces de discontinuité dans un milieu élastoplastique.