Acoustic emission : methodology and application
This monograph analyses in detail the physical aspects of the elastic waves radiation during deformation or fracture of materials. I presents the methodological bases for the practical use of acoustic emission device, and describes the results of theoretical and experimental researches of evaluation...
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| Main Authors | , , |
|---|---|
| Format | Electronic eBook |
| Language | English |
| Published |
Cham, Switzerland :
Springer,
[2017]
|
| Series | Foundations of engineering mechanics.
|
| Subjects | |
| Online Access | Full text |
| ISBN | 9783319493503 9783319493480 |
| ISSN | 1612-1384 |
| Physical Description | 1 online resource |
Cover
Table of Contents:
- Preface; Contents; Abbreviations; Nomenclature; 1 The Generation of Elastic Acoustic Emission Waves Due to the Fracture of Solids; 1.1 Some Fracture Mechanics Criteria Under Quasi-Static Loading of Materials; 1.1.1 Energy Criteria; 1.1.2 Force Criteria; 1.1.3 Deformation Criteria; 1.2 Micro-Cracking of Solids; 1.3 Physical Grounds of AE Generation; 1.4 Basic Parameters of the AE Signals; 1.4.1 Cumulative Count [60]; 1.4.2 AE Count Rate [60]; 1.4.3 Amplitude Distribution of AES; 1.4.4 Spectral and Energy Distribution of AES; 1.4.5 Identification of AES by the Waveform Type.
- 1.5 Basic Analytical Dependences Between the Fracture Parameters and the AE SignalsReferences; 2 Propagation of Elastic Waves in Solids; 2.1 Types of Elastic Waves; 2.1.1 Some General Ideas on Elastic Strain; 2.1.2 A Wave Equation for a Solid; 2.1.3 Main Ideas of the Wave Process; 2.1.4 Spatial Elastic Waves; 2.1.5 Rayleigh Surface Wave; 2.1.6 Head (Creeping) Wave; 2.1.7 Waves at an Interface of Two Media; 2.1.8 Waves in Layers and Plates; 2.1.9 Waves in Bars; 2.1.10 Other Types of Waves; 2.2 Some Basic Acoustic Properties of Media; 2.2.1 Impedance and Wave Resistance of a Medium.
- 2.2.2 Decay of Elastic Waves2.2.3 Diffraction of Elastic Waves; 2.2.4 Refraction of Elastic Waves; 2.3 AE Sources; References; 3 Analysis of Acoustic Emission Caused by Internal Cracks; 3.1 Nucleation and Sub-critical CRACK Growth; 3.1.1 Nucleation of a Mode I Penny-Shaped Crack; 3.1.2 Nucleation of a Mode III Penny-Shaped Crack; 3.2 Modelling the Sub-critical Crack Growth at Local Areas of Its Contour as a Source of Acoustic Emission Signals; 3.3 The Effect of Body Boundaries on AE Signals Caused by the Growth of an Internal Defect.
- 3.4 The Waveguide Effect on the Change of the Parameters of AE Signals3.5 The Assessment of Surface Displacements Caused by an Internal AE Source; References; 4 Some Methodological Foundations for Selecting and Processing AE Signals; 4.1 Some General Methodical Guidelines on the Use of the AE Method in the Mechanical Testing of Materials with Cracks; 4.2 Technical Aspects of Preparation for AE Tests; 4.3 Selection of Informative Parameters of AE Signals; 4.4 Simulation of AE Sources; 4.5 Simulation of AE Events at the AET Output; 4.6 Spectrum of the AE Signals During Macro-crack Growth.
- 4.7 Directional Diagram of AE Radiation During Macro-crack Growth4.8 Estimation of AE Signals Caused by Propagation of Internal Crack-like Defects; 4.9 Methods of the AET Mounting at IO; 4.10 Selection of Useful AES During AE Tests; 4.10.1 Selection of a Working Frequency Band of AE Facilities; 4.10.2 Filtration of AES by Instrumental Facilities; 4.10.3 Application of the "Dead Time" Mode; 4.10.4 The Kaiser Effect Application; 4.10.5 A Method of Spatial Selection of AES; 4.10.6 Other Methodical Approaches; References.