Metodología para la obtención de la curva esfuerzo-deformación usando el método de elemento finito inverso IFEM con pruebas de Small Punch

Elias Daniel Valadez González, Luis Alejandro Alcaraz Caracheo, Israel Aguilera Navarrete, Juan Manuel Prado Lázaro

Resumen


: En este trabajo se presenta una metodología para modelar la curva esfuerzo-deformación a partir de los datos obtenidos mediante la prueba de Small Punch Test (SPT). La estrategia consiste en establecer una correlación entre la curva carga-desplazamiento característica de la SPT y los parámetros de la ecuación constitutiva de Johnson-Cook, ampliamente utilizada para modelar la curva esfuerzo-deformación. Esta correlación se construye empleando el método de Elemento Finito Inverso (Inverse Finite Element Method, IFEM), lo que permite estimar parámetros que no pueden ser determinados directamente a través de la prueba SPT. A través de esta metodología es posible identificar propiedades mecánicas fundamentales del material, tales como el efecto de endurecimiento por deformación, la sensibilidad a la velocidad de deformación y los efectos térmicos, factores que influyen significativamente en su respuesta estructural y que no pueden ser determinados de manera directa con la SPT convencional.

Palabras clave: Small Punch Test, ecuación constitutiva, IFEM, endurecimiento por deformación, ecuación de Johnson-Cook.

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Referencias


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