Acoustic, Electromagnetic, Neutron Emissions from Fracture by Alberto Carpinteri, Giuseppe Lacidogna, Amedeo Manuello

By Alberto Carpinteri, Giuseppe Lacidogna, Amedeo Manuello

This booklet offers the suitable effects of lately came upon and interdisciplinary phenomena, caused by means of neighborhood mechanical instabilities. particularly, it seems at emissions from nano-scale mechanical instabilities similar to fracture, turbulence, buckling and cavitation, focussing on vibrations on the TeraHertz frequency and Piezonuclear reactions. destiny purposes for this paintings might comprise earthquake precursors, weather swap, strength creation and mobile biology.

A sequence of fracture experiments on usual rocks demonstrates that the TeraHertz vibrations may be able to result in fission reactions on medium weight parts observed by means of neutron emissions. an analogous phenomenon looks to have happened in numerous varied events, rather within the chemical evolution of the Earth and sunlight approach, via seismicity (rocky planets) and storms (gaseous planets). As the authors discover, those phenomena may also clarify puzzles related to the heritage of our planet, just like the ocean formation or the primordial carbon pollutants, in addition to medical mysteries, just like the so-called “cold nuclear fusion” or the proper radio-carbon relationship of natural fabrics, equivalent to the Turin Shroud. In biology, Piezonuclear reactions may well clarify the mechanism that governs the so-called "sodium-potassium pump" and extra usually, the metabolic processes.

Scientists engaged in seismology, geophysics, geochemistry, climatology, planetology, condensed subject physics and b

iology, in addition to these excited about theoretical and utilized mechanics, will all enjoy the leading edge paintings awarded the following in a holistic way.

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Extra resources for Acoustic, Electromagnetic, Neutron Emissions from Fracture and Earthquakes

Example text

25) and internal friction angle ϳ40° (Eq. 37 and Fig. , 1997a). 3 and is used for the following up numerical simulations. The parameter Cd is the damage rate constant for positive damage evolution (degradation), which defines the time needed to achieve failure after the onset of damage at ξ ϭ ξ0. , 1997a). , 2004) also shows that with the onset of acoustic emission and damage evolution, there is non-reversible deformation before the final macroscopic failure. This can be accounted for using a damage-related viscosity η, which for positive rate of damage is: ηϭ η0 .

J. Mech. Phys. Solids, 8, 100–104. , Ben-Zion, Y. , 2004 (in press). A visco-elastic damage model with application to stable and unstable fracturing. Geophys. J. Int. , 1995. Dyke propagation and arrest in Proterozoic tholeitic dyke swarms, Vestfold Hills, East Antarctica, in The Physics and Chemistry of Dykes, eds. Baer & Heimann, Balkema, Rotterdam, 79–95. , Kunin, B. , 1991. Kinematics of damage zone accompanying curved crack. Int. J. Fracture. 50, 143–152. , 1972. Cohesive force across the tip of longitudinal shear crack and Griffith’s specific surface energy, J.

The growth of slip surfaces in the progressive failure of over-consolidated clay. Proc. Roy. Soc. London, Ser. A, 332, 527–548. J. , 1996. An acoustic emission study of damage development and stress – memory effects in sandstone”. Int. J. Rock Mech. Min. , 33, 585–593. , Podladchikov, Yu. , 1993. An explicit inertial method for the simulation of viscoelastic flow: An evaluation of elastic effects on diapiric flow in two and three layer models. Proceeding of NATO Advanced Study Institute on Dynamic Modeling and Flow in the Earth and Planets.

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