Publication: Análisis numérico de impacto mediante técnicas de conversión SPH
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2015-06
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2015-07-08
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Abstract
En la actualidad, muchos son los campos que utilizan las simulaciones numéricas para la creación de un modelo que estime el comportamiento o respuesta frente a cargas extremas externas. Específicamente, en ingeniería, han sido estudiados y utilizados, durante mucho tiempo, los elementos finitos continuos como medio para discretizar el modelo en cuestión y poder realizar la simulación. Lo que interesa en el campo de la investigación es, una vez ya se tiene controlado un método, explorar si otros métodos son capaces de adaptarse. Ese es el principal motivo por el que se ha desarrollado este proyecto, intentar desarrollar un modelo numérico utilizando el método “Smoothed Particle Hydrodynamics” para realizar simulaciones de impacto sobre placas de aluminio.
Para el estudio, se han escogido tres aleaciones de aluminio como son: 2024-T351, 5754-H111 y 6082-T6, cuyas propiedades van a generar resultados diferentes, por ejemplo, en la velocidad del proyectil después del impacto. Por otro lado, como proyectiles, se ha optado por variar la geometría de la cabeza para analizar la diferencia en modo de fallo que produce cada uno en la placa.
Como base de comparación para comprobar si el modelo desarrollado se ajusta a lo esperado, se ha utilizado un conjunto de ensayos experimentales sobre placas construidas a partir de los aluminios mencionados y con proyectiles con una geometría igual a los escogidos para las simulaciones.
Nowadays, there are many fields that use numerical simulations to create a model to estimate the behaviour or response to extreme external loads. Specially, in engineering, have been studied and used, for a long time, the continuous finite elements as a means to discretize the model and to perform the simulation. What is of interest in the field of investigation is, once you have controlled a method, explore if other methods are able to adapt to the problem. This is the main reason of this proyect, develop a numerical method using the method “Smoothing Particle Hydrodynamics” to perform impact simulations on aluminum plates. For this study three aluminum alloys have been choosen, they are: 2024-T351, 5754-H111 y 6082-T6, whose properties are going to produce different results, for example, the projectile´s speed after impact. On the other hand, like bullets, different head´s geometry have been choosen to analyze the difference in failure mode of the plate. As a base of comparison to check if the developed model fits to expectations, a set of experimental tests constructed with mentioned aluminums and the same projectile geometry have been used.
Nowadays, there are many fields that use numerical simulations to create a model to estimate the behaviour or response to extreme external loads. Specially, in engineering, have been studied and used, for a long time, the continuous finite elements as a means to discretize the model and to perform the simulation. What is of interest in the field of investigation is, once you have controlled a method, explore if other methods are able to adapt to the problem. This is the main reason of this proyect, develop a numerical method using the method “Smoothing Particle Hydrodynamics” to perform impact simulations on aluminum plates. For this study three aluminum alloys have been choosen, they are: 2024-T351, 5754-H111 y 6082-T6, whose properties are going to produce different results, for example, the projectile´s speed after impact. On the other hand, like bullets, different head´s geometry have been choosen to analyze the difference in failure mode of the plate. As a base of comparison to check if the developed model fits to expectations, a set of experimental tests constructed with mentioned aluminums and the same projectile geometry have been used.
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Mecánica de sólidos, Modelo matemático, Hidrodinámica de partículas suavizadas, Smoothed Particle Hydrodynamics