On elastic waves in a medium with randomly distributed cylinders

Interference Estimation In Randomly Distributed Systems with Medium Access Control

In this paper we will discuss methods for interference estimation applicable to wireless, randomly distributed and uncoordinated networks. Primarily, the application range of such networks was mainly military [3], but nowadays there is also a growing interest on civil applications like environmental monitoring or short-range communication purposes. We assume randomly distributed network element...

Interaction of Gravitational Waves with an Elastic Solid Medium

Numerical prediction of guided waves interaction with non-axisymmetric cracks in elastic cylinders

The interaction of guided waves with non-axisymmetric damages in cylinders is studied. A three dimensional hybrid method involving the classical Finite Element Method (FEM) and the Semi-Analytical Finite Element (SAFE) technique is developed. The damage and its near field are analysed with the standard FEM. Then, eigenmode expansions of the solutions at both inlet and outlet cross-sections of t...

Disordering of a Dynamic Planar Crack Front in a Model Elastic Medium of Randomly Variable Toughness

RICE et ml. (1994, J. Mech. Ph_vs. Solids 42, 813-843) analyse the propagation of a planar crack with a nominally straight front in a model elastic solid with a single displacement component. Using the form of their results for a strictly linearized perturbation from a straight crack front which moves at uniform speed, we give the corresponding first-order expression for the deviation of a crac...

Study of Love Waves in a Clamped Viscoelastic Medium with Irregular Boundaries

A mathematical model is presented to investigate the effects of sandiness, irregular boundary interfaces, heterogeneity and viscoelasticity on the phase velocity of Love waves. Geometry of the problem is consisting of an initially stressed viscoelastic layer with corrugated irregular boundaries, which is sandwiched between heterogeneous orthotropic semi-infinite half-space with initial stress a...