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Summary
Summary
Earthquakes are caused by the sudden release of energy during the fracture of stressed rock within the Earth's crust. This phenomenon is similar to that which occurs in materials under load, and although they take place on very different scales, these two phenomena - earthquakes in geophysics and damage in structural materials - have similarities. In both cases, there is a release of elastic energy from sources located inside a medium. These are selected papers from special sessions at the 11th International Conference on Fracture, held in Turin in 2005. They provide an outline of topics related to earthquakes and Acoustic Emission, and discuss the latest developments in this area. The papers have been divided into two categories: Seismic Mechanics & Earthquakes and Structural Failure & Acoustic Emission. Earthquakes and Acoustic Emission will serve as a useful supplementary textbook for postgraduates, while being of special interest to professionals in the field of earthquakes and acoustic emission.
Table of Contents
Preface | p. IX |
1 Seismic Mechanics and Earthquakes | |
1.1 Earthquake phenomenology and dynamics | |
The Scaling of Geological Faults | p. 3 |
Effects of Nonlinear Weakening on Earthquake Source Scalings | p. 9 |
Seismic Energy Radiation from Dynamic Faulting | p. 17 |
Damage Rheology Model and Decay Law of Aftershock Activity | p. 23 |
Spectral Element Simulation of Rupture Dynamics | p. 33 |
1.2 Mechanics of friction and faulting | |
Non-Linear Slip-Weakening in a Rotary Gouge Friction Experiment | p. 43 |
Does Elastic Rebound Theory Apply to Seismic Faults? | p. 51 |
Correlations of Stress Distributions Along the Fault: From Laboratory Fracture Roughness to Fault Asperity Squeeze | p. 57 |
Detachment Waves and the Onset of Frictional Slip | p. 65 |
Crack-Like and Pulse-Like Dynamic Frictional Sliding | p. 71 |
2 Structural Failure and Acoustic Emission | |
2.1 AE theoretical studies | |
Identification of Microcracking Process in Fracture Process Zone by AE | p. 79 |
Consequences of Acoustic Emission on Crack Speed and Roughness Exponent in Brittle Dynamic Fracture | p. 89 |
Failure Time, Critical Behaviour and Activation Processes in Crack Formation | p. 95 |
Response of Fracture Nucleation Site to Weak Mechanical Pulses | p. 103 |
Fracture in Two Dimensions (in Paper): Acoustic Emission Studies and Theoretical Lessons | p. 109 |
2.2 AE testing on concrete and concrete structures | |
Micromechanics of Corrosion Cracking in Reinforced Concrete by AE | p. 119 |
Damage Mechanics of Carbonated Concrete by AE Rate-Process Analysis | p. 129 |
Brazilian Test of Concrete Evaluated by AE | p. 139 |
2.3 AE testing on steel, composites and other materials | |
Evolution of Damage Accumulation in Low-Carbon Steel in Tension Condition | p. 149 |
Fatigue Performance of Sandwich Composites | p. 155 |
On-Process Monitoring of Ceramics and Ceramic Coatings by Laser AE | p. 163 |
Fracturing, Acoustic Emission, and Numerical Simulation of Granite Under Mode II Loading | p. 171 |
2.4 AE structural monitoring and damage assessment | |
Damage Quantification for Concrete Structures by Improved b-Value Analysis of AE | p. 181 |
Structural Monitoring and Life-Time Assessment of Medieval Towers | p. 191 |
Author index | p. 201 |