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In the paper entitled “Comments on ‘Geomechanical and Geochemical Evidence of Piezonuclear Fission Reactions in the Earth's Crust’ by A. Carpinteri and Manuello” by U. Bardi and G. Comoretto, the authors criticise the hypothesis based on piezonuclear reactions for the interpretation of the compositional evolution of the Earth's crust. We report a detailed reply of how the traditional theories, used...
Abstract: Energy‐dispersive X‐ray spectroscopy (EDS) is performed on different samples of external or fracture surfaces belonging to specimens used in piezonuclear tests [Strain 45, 2009, 332; Strain (in press); Phys. Lett. A. 373, 2009, 4158]. For each sample, different measurements of the same crystalline phases (phengite or biotite) are performed to obtain averaged information of the chemical...
Abstract: In this work, we measured the electromagnetic field, given by the moving charges, during laboratory fracture experiments on specimens made of different heterogeneous materials. We investigated the mechanical behaviour of concrete and rocks samples loaded up to their failure by the analysis of acoustic emission (AE) and electromagnetic emission (EME). All specimens were tested in compression...
Abstract: A scaled model of a two‐span masonry arch bridge has been built to investigate the effect of the central pile settlement because of riverbank erosion. The bridge geometry and the structural details, included the masonry bricks and mortar joints, are realized in the scale 1 : 2. The model bridge has been equipped with different Non‐Destructive Testing (NDT) instruments, including accelerometers,...
Abstract: The damage process in a concrete specimen subjected to uniaxial compression test is investigated by detection of the propagating elastic waves because of micro‐ and macrocrack growth. Besides the high‐frequency acoustic emissions (AEs), the presence of low‐frequency elastic emissions (ELEs), from 1 to 10 kHz, is detected just before the specimen failure. A spectral analysis of the ELEs...
Abstract: Piezonuclear reactions, which occur in inert and non‐radioactive elements, are induced by high pressure and, in particular, by brittle fracture phenomena in solids under compression. These low‐energy reactions generally take place in nuclei with an atomic weight that is lower or equal to that of iron (Fe). The experimental evidence, obtained from repeatable measurements of neutron emissions...
Abstract: In this paper, an analytical model based on the concept of strain localisation is proposed for the analysis and prediction of the response of quasi‐brittle materials in uniaxial compression tests, such as mortar, plain concrete with different compression strengths, as well as fibre‐reinforced concrete. The proposed approach, referred to as Overlapping Crack Model, relies only on a pair...
Abstract: Some of the most significant architectural works are monumental masonry constructions. Among these, the Cathedral of Syracuse can be viewed as a fundamental element in the cultural heritage of Europe. For the preservation of these monuments, it is necessary to assess their durability by taking into account cumulative damage and cracking conditions in the structures. The paper describes...
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