Publication: Simulación de ensayos tipo spalling en probetas de polímero cuasifrágil
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2011-06
Defense date
2011-07-21
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Abstract
Las propiedades de los materiales varían según las solicitaciones a las que se vean sometidos por lo que, a la hora de ensayarlos, las condiciones del laboratorio deben reproducir lo más fielmente posible las condiciones de servicio a las que estará sometido el material. Este trabajo aporta un estudio numérico sobre los ensayos “Spalling”, una nueva técnica que permite determinar las propiedades mecánicas de materiales cuasifrágiles en condiciones dinámicas mediante tracción indirecta. Se ha llevado a cabo un estudio de esta técnica mediante el programa de elementos finitos ABAQUS, empleando para ello probetas de PMMA (polimetil metacrilato) de sección rectangular y cilíndrica con el fin de determinar el comportamiento de dichas probetas durante el ensayo. En este proyecto se presenta un amplio estudio de la utilización de la técnica Spalling utilizada sobre probetas de material cuasifrágil para comprender qué fenómenos ocurren en ensayos de tracción a altas velocidades de deformación y por qué, recogiendo datos muy útiles que ahorrarán tiempo y dinero en ensayos de laboratorio. _______________________________________________________________________________________________________
The material properties changed according to the requirements which they are subjected so that, when tested, the laboratory conditions must reproduce as faithfully as possible the service conditions that the material will be subjected. This work provides a numerical study of the “Spalling” test, a new technique to determine the mechanical properties of quasi-brittle materials under dynamic conditions by indirect traction. It was carried out a study of this technique by the finite element program ABAQUS, using rectangular and cylindrical specimens of PMMA (polymethyl methacrylate) to determine the behavior of these specimens during the test. This project presents a wide study of Spalling technique used on quasi-brittle specimens to understand what phenomena occur in tensile tests at high strain rates and why, collecting useful data that will save time and money on laboratory test.
The material properties changed according to the requirements which they are subjected so that, when tested, the laboratory conditions must reproduce as faithfully as possible the service conditions that the material will be subjected. This work provides a numerical study of the “Spalling” test, a new technique to determine the mechanical properties of quasi-brittle materials under dynamic conditions by indirect traction. It was carried out a study of this technique by the finite element program ABAQUS, using rectangular and cylindrical specimens of PMMA (polymethyl methacrylate) to determine the behavior of these specimens during the test. This project presents a wide study of Spalling technique used on quasi-brittle specimens to understand what phenomena occur in tensile tests at high strain rates and why, collecting useful data that will save time and money on laboratory test.
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Ensayo de materiales, Materiales compuestos, Ensayos “Spalling”