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Acoustic Emission Testing
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Acoustic Emission Testing
von: Christian U. Grosse, Masayasu Ohtsu
Springer-Verlag, 2008
ISBN: 9783540699729
406 Seiten, Download: 19349 KB
 
Format: PDF
geeignet für: PC, MAC, Laptop Online-Lesen Apple iPad, Android Tablet PC's

Typ: B (paralleler Zugriff)

 

 
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Inhaltsverzeichnis

  Preface 5  
  Authors 7  
  Table of Contents 9  
  Part A Basics 11  
     1 Introduction 12  
        1.1 AET in the Context of Other Techniques 12  
        1.2 Advantages and Disadvantages of AET 14  
        1.3 Acoustic Emission in Context to Seismology 15  
        References 18  
     2 History and Fundamentals 20  
        2.1 Introduction 20  
        2.2 Discovery of AE 20  
        2.3 Founders and Terminology 22  
        2.4 AE in Concrete Engineering 22  
        2.5 Development of AE Techniques 24  
        2.6 Fundamentals of AE Measurement 25  
        2.7 Concluding Remarks 26  
        References 26  
     3 Sensor and Instrument 28  
        3.1 Introduction 28  
        3.2 Sensor and System Response 29  
        3.3 Response of PZT Sensor 32  
        3.4 Calibration and Detection 38  
        3.5 Other Types of Sensors 44  
        3.6 Instrument 45  
        3.7 Data Acquisition and Wave Parameters 47  
        3.8 Concluding Remarks 48  
        References 48  
     4 Parameter Analysis 50  
        4.1 Introduction 50  
        4.2 Identification of AE Signal 50  
        4.3 AE Signal Parameters 51  
        4.4 Parametric Analysis 54  
        4.5 Concluding Remarks 58  
        References 58  
     5 Signal-Based AE Analysis 61  
        5.1 Differences Between Parameter- and Signal-based AET 61  
        5.2 The Influence of Sensing Techniques to Signal- based AET 68  
        5.3 The Influence of Amplifiers and Data Acquisition Techniques to Signal- based AET 73  
        5.4 Localization Techniques 74  
        5.5 Signal-based Acoustic Emission Techniques 81  
        5.6 Inversion Techniques 85  
        References 102  
     6 Source Localization 108  
        6.1 Introduction 108  
        6.2 Principal of Localization Procedures 110  
        6.3 High Order Localization Algorithms 118  
        6.4 Application and Practical Considerations of the Iterative Localization Method 135  
        6.5 Further Methods 143  
        References 150  
     7 Source Mechanisms of AE 155  
        7.1 Introduction 155  
        7.2 Integral Representation 156  
        7.3 Green’s Functions 158  
        7.4 AE Waves Due to a Point Force 159  
        7.5 Theoretical AE Waveforms 166  
        7.6 Deconvolution Analysis 169  
        7.7 Moment Tensor 171  
        7.8 Spatial Derivative of Green’s Functions 173  
        7.9 Dislocation Model 175  
        7.10 Radiation Pattern 177  
        References 179  
     8 Moment Tensor Analysis 181  
        8.1 Introduction 181  
        8.2 Theoretical Background 181  
        8.3 Far-Field Approximation 182  
        8.4 Sensor Calibration 186  
        8.5 SiGMA Procedure 188  
        8.6 Unified Decomposition of Eigenvalue 189  
        8.7 Crack Orientation 193  
        8.8 Two-Dimensional Treatment 195  
        8.9 Damage Mechanics 199  
        8.10 Error Estimation 199  
        8.11 Visualization by VRML 202  
        8.12 Concluding Remarks 205  
        References 205  
  Part B Applications 207  
     9 General Remarks on Applications 208  
        9.1 Introduction 208  
        9.2 Basics of Measurement 208  
        9.3 Elimination of Noise 210  
        9.4 Setup of AE System and Measurement 212  
        9.5 Concluding Remarks 213  
        References 214  
     10 Concrete 215  
        10.1 Introduction 215  
        10.2 Concrete of Early Age 216  
        10.3 Hardened Concrete 221  
        10.4 Damage Assessment of Reinforced Concrete 224  
        10.5 Corrosion Monitoring in Reinforced Concrete 227  
        10.6 Quantitative Damage Evaluation of Concrete 231  
        10.7 Application to Fracture Mechanics 236  
        10.8 Concluding Remarks 239  
        References 239  
     11 Acoustic Emission in Study of Rock Stability 242  
        11.1 Introduction 242  
        11.2 AE Monitoring in Mines Fundamentals 246  
        11.3 AE monitoring in Granite 251  
        11.4 AE Monitoring in Rock Salt 256  
        11.5 AE Measurement During Hydraulic Fracturing Tests 273  
        11.6 AE Measurements in Laboratory Studies on Rock Specimens 280  
        References 306  
        Acknowledgement 306  
     12 Acoustic Emissions in Wood 314  
        12.1 Introduction 314  
        12.2 Wood Structure 314  
        12.3 Ultrasonic Properties 316  
        12.4 Example Acoustic Emission Applications to Wood 316  
        12.5 Application: AE Energy and Fracture 319  
        12.6 Summary 324  
        References 324  
     13 Superstructures 326  
        13.1 Introduction 326  
        13.2 Building 327  
        13.3 Concrete Bridge 329  
        13.4 Steel Bridge 336  
        13.5 Steel-Concrete Composite Slab 339  
        13.6 Concluding Remarks 341  
        References 341  
     14 Substructures 343  
        14.1 Introduction 343  
        14.2 Concrete Pile 343  
        14.3 Railway Substructure 352  
        References 366  
     15 Wireless Sensing and Acoustic Emission Array Techniques 368  
        15.1 Wired and Wireless AE Equipment 368  
        15.2 Necessity for a Continuous AE Sensing of Structures 368  
        15.3 Basics of Monitoring Performance-based Structures 369  
        15.4 Sensors, MEMS and Motes 370  
        15.5 Sensor Networks and Protocols 371  
        15.6 Hardware Developments 373  
        15.7 Monitoring Bridges Using Wireless Sensing Techniques 375  
        15.8 Signal Detection 375  
        15.9 Outlook 379  
        References 381  
     16 Opportunities, Limitations, Accuracy and Skill 383  
        16.1 Introduction 383  
        16.2 Opportunities and Limitations 383  
        16.3 Accuracy 389  
        16.4 Skills 393  
        References 396  
        Index 398  


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