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AUTHOR(S): Adnan I. O. Zaid
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KEYWORDS Stress waves, Compressive stress, Transmission, Reflection, Interaction, Fracture, Conical rod |
ABSTRACT Stresses caused from Intermediate rate and dynamic rate loading having strain rates in the range 10 to 10000 /s are transmitted in solids by elastic stress waves. Two types of these waves exist either longitudinal or torsional. The longitudinal stress waves transmit tensile and compressive stresses with speed Cl = (E/ ρ)1/2, which equals the acoustic speed, whereas the torsional waves transmit shear stresses with speed Ct =(G/ ρ)1/2, where E is the modulus of elasticity, ρ is the density, and G is the modulus of rigidity of the solid material. In this paper, stress wave propagation in solids using the well established Rayleigh acoustic equations are given and discussed. This includes the transmission, reflection and interaction of the stress waves. The useful applications of these waves are presented and discussed. A new theoretical model based on approximating the conical rod into semi-infinite number of steps is developed for investigating the history of a dynamic compressive stress pulse impinging at its large end. The amplification of the stress level during its transmission and reflection is given and discussed. |
Cite this paper Adnan I. O. Zaid. (2016) Stress Waves in Solids, Transmission, Reflection and Interaction and Fractures Caused by Them: State of the Art. International Journal of Theoretical and Applied Mechanics, 1, 155-164 |
