Earthquakes and Acoustic Emission: Selected

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.

Preface	p. IX
Seismic Mechanics and Earthquakes
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
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
Structural Failure and Acoustic Emission
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
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
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
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
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Earthquakes and Acoustic Emission: Selected Papers from the 11th International Conference on Fracture, Turin, Italy, March 20-25, 2005

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