The present study is concerned with the propagation of Lamb waves in a homogeneous isotropic thermoelastic micropolar solid with two temperatures bordered with layers or half spaces of inviscid liquid subjected to stress free boundary conditions. The generalized theory of thermoelasticity developed by Lord and Shulman has been used to investigate the problem. The secular equations for symmetric...

A high-order continuum model is developed to study wave propagation in nanowires. By using the model, heterogeneous nanostructure effects can be captured especially for high wave frequency cases. Surface stress effects are also included by using the incremental deformation approach. The governing equations of motion in the nanowire are derived including both the strain-independent and strain-de...

In this study, wave propagation phenomena of phase states are observed at van der Pol oscillators coupled by inductors as a ladder. For the case of 17 oscillators, interesting wave propagation phenomena of phase states are found. By using the relationship between phase states and oscillation frequencies, the mechanisms of the propagation and the reflection of wave are explained. Circuit experim...

Auxetic cellular solids in the forms of honeycombs and foams have great potential in a diverse range of applications, including as core material in curved sandwich panel composite components, radome applications, directional pass band filters, adaptive and deployable structures, filters and sieves, seat cushion material, energy absorption components, viscoelastic damping materials and fastening...

A new model to analyse the wave propagation between moving vehicles is presented in this paper. The approach consists of tree major parts: the modelling of the road traffic, the modelling of the environment adjacent to the road lane and the actual modelling of the wave propagation. A realistic traffic model is used to generate time series of instantaneous positions and velocities of vehicles on...

A Lamb wave-based crack detection method for aluminum plates health monitoring is developed in this paper. Piezoelectric disks are employed to actuate and capture the Lamb wave signals. The position of crack is assumed to be aligned with the sensor and actuator.  Extraction of high quality experimental results of lamb wave propagation in a plate-like structure is considerably complicated due to...

In the 1980s, Prof. Novotný and Dr. Pechač put heads together at the Faculty of Electrical engineering at the Czech Technical University in Prague, and thought up first fundaments of easy and rapid method of ray propagation. After graduating, I started enthusiastically working on indoor propagation modelling based on semi-empirical models and on full ray tracing prediction within an anechoic sh...

The vibration analysis of cylindrical shells using wave propagation method is presented. Results obtained using the method have been evaluated against those available in the literature. Comparison of the results by the present method and numerical "nite element method is also carried out. It is possible to conclude through the comparisons that the present method is convenient, e!ective and accu...

Wave propagation problems on networks arise in many fields of technology. Let us give a brief list of possible applications: •Acoustics: for example the human vocal tract can be considered as a Y-shaped graph; •Mechanics: wave propagation in Timoshenko beam structures. For example, jointed beams and beams with parameter discontinuities can be regarded as network systems; •Electrodynamics: elect...