Utilización del factor de densidad de energía de deformación en el modelo de crecimiento de la grieta en árboles de molinos de caña de azúcar. // Use of the density deformation energy factor in the crack growth pattern of sugar cane mills axles.
Abstract
En el trabajo se aplica el criterio de densidad de energía de deformación en el modelo de crecimiento de la grieta para los
árboles de los molinos de caña de azúcar. La utilización de este criterio permite predecir no solamente la razón de
crecimiento de las grietas sino también la inclinación que las mismas van experimentando durante su propagación, con
respecto al plano inicial donde surgen. Son modelados los dos tipos de grietas que usualmente ocurren en estos elementos,
la grieta semielíptica superficial y la circunferencial. Se demuestra que la grieta circunferencial siempre crece en un plano
normal al eje del árbol, mientras que las semielípticas lo harán en un plano algo inclinado en dependencia del predominio
de las tensiones tangenciales. La grieta circunferencial resultó ser más crítica que la semielíptica superficial.
Palabras claves: Energía de deformación, molinos de caña, propagación de grietas.
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Abstract.
In this paper the approach of the density deformation energy factor in the crack growth pattern of sugar cane mills axles is
applied. The use of this approach allows predicting not only the rate of cracks growth but also the inclination that the same
ones experienced during its propagation, with regard to the initial plane where they arise. The two types of cracks that
usually happens in these elements are modelled, the semielliptical superficial crack and the circumferential. It is
demonstrated that the circumferential crack always grows in a normal plane to the axis of the axle, while the semielliptical
will make it in a plane something bowed in dependence of the prevalence of the tangential tensions. The circumferential
crack turned out to be more critical than the semielliptical superficial.
Keywords: Energy of deformation, cane mills, crack propagation.
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