Leger / Deschamps Ultrasonic Wave Propagation in Non Homogeneous Media

1. Auflage 2009
ISBN: 978-3-540-89105-5
Verlag: Springer-Verlag
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 435 Seiten

Non Destructive Testing and Non Destructive Evaluation using Ultrasounds covers an important field of applications and requires a wide range of fundamental theoretical, numerical and experimental investigations. In the present volume, the reader will find some relevant research results on wave propagation in complex materials and structures which are concerned with today's problems on composites, bonding, guided waves, contact or damage, imaging and structural noise. The fifth meeting of the Anglo-French Research Group on 'Wave propagation in non homogeneous media with a view to Non Destructive testing' was held in Anglet, France, June 2-6, 2008.

Autoren/Hrsg.

Leger, Alain

Deschamps, MarC

Deschamps, Marc

Inhaltsverzeichnis

1;Preface;6
2;Contents;8
3;The WKB method applied to the reflection transmission by a depth varying random distribution of cylinders in a fluid slab like region;12
4;Advances in ultrasonic testing of autenitic stainless steel welds. Towards a 3-d description af the material including attenuation and optimisation by inversion;25
5;Imaging of defects within austenitic steel welds using an ultrasonic array;35
6;Materials and mechanical aspects of bonded joints;49
7;The causal differential scattering approach tocal culating the effective properties of random composite materials with a particle size distribution;58
8;Modeling of scattering of ultrasounds by flaws for NDT;69
9;Finite element computation of leaky modes in stratified waveguides;80
10;Ultrasonic bulk wave propagation in concentrated heterogeneous slurries.;94
11;Dynamics of elastic bodies connected by a thin adhesive layer;106
12;Acoustic wave attenuation in a rough-walled waveguide filled with a dissipative fluid;118
13;Some advances towards a better understanding of wave propagation in civil engineering multi-wire strands;130
14;A numerical method for the simulation of NDT experiments in an elastic waveguide;143
15;Finite elements for a beam system with nonlinear contact under periodic excitation;154
16;Nonlinear acoustic fast and slow dynamics of damaged composite materials : correlation with acoustic emission;165
17;Asymptotic expansions of vibrationswith small unilateral contact;176
18;Propagation of compressional elastic waves through a 1-D medium with contact nonlinearities;186
19;3D Finite Element simulations of an air-coupled ultrasonic NDT system;198
20;The reverse time migration technique coupled with finite element methods;210
21;Modelling of corner echo ultrasonic inspection with bulk and creeping waves;220
22;Attenuation of Lamb waves in the vicinity of a forbidden band in a phononic crystal;230
23;3D orthogonality relations for the surface waves and the far field evaluation in viscoelas tic layered solids with or without fluid loading;239
24;Damage detection in foam core sandwich structures using guided waves;252
25;Sensitivity of the guided waves to the adhesion of lap joints: Finite Element modeling and experimental investigations;262
26;Guided waves in empty and filled pipes with optimized magnetostrictive transduction;272
27;Piezoelectric material characterization by acoustic methods;283
28;Ultrasound characterization of aggregated red blood cells: towards in vivo application;293
29;A 3-d semi-analytical model to predict the behavior of ultrasonic bounded beam traveling in cylindrical solid bar embedded in a solid matrix;303
30;Comparison between a multiple scattering method and direct numerical simulations for elastic wave propagation in concrete;316
31;Investigation of a novel polymer foam material for air coupled ultrasonic transducer applications;327
32;Dual signal processing approach for Lamb wave analysis;339
33;Structural health monitoring of bonded composite patches using Lamb waves;352
34;Simulation of structural noise and attenuation occuring in ultrasonic NDT of polycrystalline materials;361
35;Ultrasonic array reconstruction methods for the localization and the characterization of defects in complex NDT configurations;372
36;Ultrasonic nonlinear parameter measurement: critical investigation of the instrumentation;381
37;Investigation of damage mechanisms of composite materials: Multivariable analysis based on temporal and wavelet features extracted from acoustic emission signals;392
38;Propagation of elastic waves in a fluid-loaded anisotropic functionally graded waveguide: Application to ultrasound characterization of cortical bone;403
39;Coherent wave propagation in solids containing spatially varying distributions of finite-size cracks;415