Publication: Análisis del factor de intensidad de tensiones en un eje con una fisura de frente recto
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2012-06
Defense date
2012-06-26
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Abstract
Uno de los parámetros que estudia la Mecánica de Fractura Lineal Elástica (LEFM) es el Factor de Intensidad de Tensiones K (FIT) en el frente de fisura, y de cómo éste se puede aplicar como parámetro de fractura ya tiene una relación directa con la vida útil de elementos trabajando a fatiga. En este proyecto, basándonos en los conocimientos adquiridos, se va a proceder a analizar numéricamente la evolución del FIT en un eje fisurado de frente recto dependiendo de uno de los parámetros característicos de las fisuras, la profundidad "a", así como comparar de qué modo afecta el tipo de contacto que se define en las superficies de contacto cuando la fisura se encuentra cerrada. Debido a la tipología del problema, el Factor de Intensidad de Tensiones que se va a analizar es KI (Factor de Intensidad de Tensiones de modo I, fractura a tracción). El desarrollo del proyecto se realiza con el código comercial de Método de Elementos Finitos, utilizando el programa ABAQUS, que nos permite calcular el FIT de una manera rápida y observar una correlación con los resultados que se esperan obtener. _______________________________________________________________________________________________________________
One of the parameters that studies the linear elastic fracture Mechanics (LEFM) is the stress intensity factor K (FIT) in the crack front, and how it can be applied as parameters of fracture and has a direct relationship with the lifetime of working elements fatigue. In this project, basing on the knowledge acquired, it will proceed to analyze numerically the evolution of the FIT in a cleft of straight front axle depending on one of the characteristic parameters of the fissures, the depth "a", so as to compare way affects the type of contact as defined in the contact surfaces when the crack is closed. Due to the typology of the problem, the stress intensity factor to be analyzed is KI (Stress Intensity Factor of mode I, tensile fracture). The project development is performed with the commercial code Finite Element Method, using the ABAQUS program, which allows us to calculate the FIT of a fast and observe a correlation with the results to be obtained.
One of the parameters that studies the linear elastic fracture Mechanics (LEFM) is the stress intensity factor K (FIT) in the crack front, and how it can be applied as parameters of fracture and has a direct relationship with the lifetime of working elements fatigue. In this project, basing on the knowledge acquired, it will proceed to analyze numerically the evolution of the FIT in a cleft of straight front axle depending on one of the characteristic parameters of the fissures, the depth "a", so as to compare way affects the type of contact as defined in the contact surfaces when the crack is closed. Due to the typology of the problem, the stress intensity factor to be analyzed is KI (Stress Intensity Factor of mode I, tensile fracture). The project development is performed with the commercial code Finite Element Method, using the ABAQUS program, which allows us to calculate the FIT of a fast and observe a correlation with the results to be obtained.
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Mecánica de sólidos, Eje fisurado, Mecánica de fractura lineal elástica