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Article
Open AccessEffect of local stiffeners and war** constraints on the buckling of symmetric open thin-walled beams with high war** stiffness
Local stiffeners affect the behaviour of thin-walled beams (TWBs). An in-house code based on a one-dimensional model proved effective in several instances of compressive buckling of TWBs but gave counterintuit...
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Article
A Novel Heaving Ocean Wave Energy Harvester with a Frequency Tuning Capability
This study introduces a novel wave energy harvester (WEH) with frequency conversion capability to convert the ocean wave energy to usable electricity based on the piezoelectric effect. The presented WEH is wit...
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Chapter and Conference Paper
Energy Balance During Elettrolysis and Cavitation Experiments
Literature presents several cases of nuclear anomalies occurring in condensed matter, during fracture of solids, cavitation of liquids, and electrolysis. Previous papers by the authors have recently shown that...
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Chapter and Conference Paper
Nanomechanics Instabilities and TeraHertz Vibrations: From Geochemical Evolution to Fracto-Emission Seismic Precursors
Three different forms of energy might be used as earthquake precursors for environmental protection against seismicity. At the tectonic scale, Acoustic Emission (AE) prevails, as well as Electro-Magnetic Emiss...
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Chapter and Conference Paper
On the Use of Piezoelectric Sensors for Experimental Modal Analysis
Piezoelectric disk buzzers are commonly used on stringed musical instruments to acquire the sound in the form of a voltage signal. Aim of the present investigation is to assess the possibility of using these t...
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Chapter and Conference Paper
Neutron Emissions from Hydrodynamic Cavitation
During the last few years, some investigators reported interesting results regarding neutron emissions from ultra-sonic cavitation in liquids and solids. In the present paper, the described experiments were co...
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Chapter and Conference Paper
Compositional Variations in Palladium Electrodes Exposed to Electrolysis
Literature presents several cases of nuclear anomalies occurring in condensed matter, during fracture of solids, cavitation of liquids, and electrolysis experiments.
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Chapter and Conference Paper
PZT Experimental Detection of Natural Frequencies for Compressed Thin-Walled Beams
By means of PZT pickups, we experimentally measured the natural frequencies of an aluminum thin-walled open profile under centered compression, and investigated the effects of end war** constraints on free v...
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Chapter and Conference Paper
Analysis of High-Frequency Vibrational Modes Through Laser Pulses
The authors are currently doing fatigue tests, by using sonotrodes working at 20 kHz, and compression tests on solid samples of rock materials. The specimens are monitored by laser sources focused on spots of ...
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Chapter and Conference Paper
Environmental Protection by the Opto-acoustic and Neutron Emission Seismic Precursors
The acoustic (AE) and electromagnetic (EM) emission signals detected during the failure of brittle materials are analogous to the anomalous mechanical and geoelectromagnetic waves observed before major earthqu...
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Chapter and Conference Paper
Experimental and Numerical Elastodynamic Analysis of Compressed Open Thin-Walled Beams
Compressed thin-walled beams with open section are prone to torsional, or flexural-torsional, buckling. Here we present the results of several studies where, by piezoelectric pickups and a universal testing ma...
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Article
Critical Plane Orientation Influence on Multiaxial High-Cycle Fatigue Assessment
In the present paper, the multiaxial fatigue lifetime of structural components failing in the high-cycle fatigue regime is evaluated by employing the modified Carpinteri-Spagnoli (C-S) multiaxial fatigue crite...
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Article
RETRACTED ARTICLE: Is the Shroud of Turin in relation to the Old Jerusalem historical earthquake?
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Article
RETRACTED ARTICLE: Correlated fracture precursors in rocks and cement based materials under stress
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Article
RETRACTED ARTICLE: Cold Nuclear Fusion explained by hydrogen embrittlement and piezonuclear fissions in the metallic electrodes—Part I: Ni–Fe and Co–Cr electrodes
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Article
RETRACTED ARTICLE: Ultrasonic piezonuclear reactions in steel and sintered Ferrite bars
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Chapter and Conference Paper
Wireless Acoustic Emission Monitoring of Structural Behavior
The few non-visual methodologies make use of wired devices. Systems based on wireless transmission should be cost efficient and adaptive to different structures. The Acoustic Emission (AE) technique is an inno...
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Chapter and Conference Paper
High-Frequency Resonance Phenomena in Materials Subjected to Mechanical Stress
The elastic energy released by micro-cracking yields to macroscopic fracture whose mechanical vibrations are converted into electromagnetic (EM) oscillations over a wide range of frequencies, from few Hz to MH...
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Chapter and Conference Paper
Hydrogen Embrittlement and “Cold Fusion” Effects in Palladium During Electrolysis Experiments
Recent experiments provided evidence of piezonuclear reactions occurring in condensed matter during fracture of solids, cavitation of liquids, and electrolysis. These experiments were characterized by signific...
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Chapter and Conference Paper
Acoustic Emission Monitoring of Rock Specimens During Fatigue Tests
Some of the most significant civil and historical structures, such as bridges, viaducts, dams and ancient monumental buildings, may collapse below the critical loading conditions due to fatigue effects. In the...
