
handle: 2183/46010
[Resumen] La presencia del olivino en meteoritos o en el manto superior de planetas rocosos hace que esté sometido a condiciones extremas de presión y temperatura. Reproducir estas condiciones en el laboratorio permite comprender mejor los procesos que afectan a este mineral. En este trabajo se estudian los efectos de la presión sobre la peridotita de olivino mediante un experimento de impacto con una barra de presión de Hopkinson dividida (Split Hopkinson Pressure Bar, SHPB). Se estudiaron tres muestras antes y después del impacto mediante microtomografía computarizada, observándose el desarrollo de una red de fracturas a lo largo de toda la muestra y con zonas de mayor densidad continuas en diagonal. A partir de los datos obtenidos se calcularon parámetros mecánicos como la tensión de falla (120 MPa), el módulo de Young (35 GPa) y la tasa de deformación (300 s⁻¹). Estos valores se compararon con la literatura, mostrando concordancia con estudios previos.
[Abstract] The presence of olivine in meteorites or in the upper mantle of rocky planets exposes it to extreme conditions of pressure and temperature. Reproducing these conditions in the laboratory provides valuable insights into the processes that affect this mineral. This study investigates the effects of pressure on olivine peridotite using through a controlled impact experiment using a Split Hopkinson Pressure Bar (SHPB). Three samples were analysed before and after impact using microcomputed tomography, revealing the formation of a fracture network along the entire sample, with continuous diagonal zones of higher density, was observed. Based on the data obtained, key mechanical parameters such as failure stress (120 MPa), Young's modulus (35 GPa), and strain rate (300 s⁻¹), were calculated. These values were compared with those reported in the literature and were found to be consistent with previous studies.
Traballo de fin de grao (UDC.CIE). Nanociencia e nanotecnoloxía. Curso 2024/2025
Microtomografía computarizada (μCT), Experimento de choque (Shocking experiment), Split Hopkinson Pressure Bar (SHPB), Olivino
Microtomografía computarizada (μCT), Experimento de choque (Shocking experiment), Split Hopkinson Pressure Bar (SHPB), Olivino
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