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

By Alberto Carpinteri, Giuseppe Lacidogna, Amedeo Manuello

This e-book provides the suitable results of lately chanced on and interdisciplinary phenomena, brought on via neighborhood mechanical instabilities. specifically, it seems at emissions from nano-scale mechanical instabilities comparable to fracture, turbulence, buckling and cavitation, focussing on vibrations on the TeraHertz frequency and Piezonuclear reactions. destiny functions for this paintings may comprise earthquake precursors, weather swap, power creation and mobile biology.

A sequence of fracture experiments on usual rocks demonstrates that the TeraHertz vibrations may be able to set off fission reactions on medium weight components followed through neutron emissions. an identical phenomenon appears to be like to have happened in different varied occasions, relatively within the chemical evolution of the Earth and sun method, via seismicity (rocky planets) and storms (gaseous planets). because the authors discover, those phenomena may also clarify puzzles on the topic of the background of our planet, just like the ocean formation or the primordial carbon toxins, in addition to medical mysteries, just like the so-called “cold nuclear fusion” or the right kind radio-carbon courting of natural fabrics, equivalent to the Turin Shroud. In biology, Piezonuclear reactions may possibly clarify the mechanism that governs the so-called "sodium-potassium pump" and extra normally, the metabolic processes.

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

iology, in addition to these serious about theoretical and utilized mechanics, will all savour the cutting edge paintings awarded right here in a holistic way.

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

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The neutron measurements obtained on the two Luserna stone specimens exceed the background level by approximately one order of magnitude, when catastrophic failure occurred. 1 MPa. 8)Â10À4 nthermal cmÀ2 sÀ1 (see Fig. 2). 4 MPa. 5)Â10À4 nthermal cmÀ2 sÀ1. Fig. 1 Granitic orthogneiss (Luserna stone) specimens before (a) and after the fracture tests (b) 26 A. Manuello et al. Fig. 2 Load vs. time and cps curve for test specimen of granitic orthogneiss In more recent experiments, cylindrical specimens with different size and slenderness were selected, instead of prismatic specimens as in the preliminary tests.

Manuello et al. Introduction It is possible to demonstrate experimentally that brittle fracture in solid materials can be accompanied by the release of different forms of energy [1–3]. In recent studies, it has been observed that quasi-brittle materials such as granitic orthogneiss (Luserna stone) subjected to compression tests under monotonic displacement control, by cyclic loading, or by ultrasonic vibration, are characterized by neutron emissions up to one order of magnitude greater than the background level [1–11].

2 Number of specimens 2 D (mm) 50 H (mm) 100 λ ¼ H/D 2 Compressive strength (MPa) 162 (MPa) Elastic modulus 50 (MPa) 2 2 50 50 100 100 2 2 170 (MPa) 250 (MPa) 60 (MPa) 220 (GPa) Testing Procedure and Devices For the lower frequency (2 Hz), six specimens, two for each kind of rock (D ¼ 50 mm, H ¼ 100 mm, λ ¼ 2) were used. The tests were carried out by means of MTS servo-controlled hydraulic testing machine with a maximum capacity of 1000 kN, working by a digital type electronic control unit (see Fig.

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