Computerized deformation analyzer

G - Physics – 06 – F

Patent

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Details

G06F 17/50 (2006.01) G06T 17/20 (2006.01)

Patent

CA 2493867

According to one embodiment of the invention, a method for determining deformation of a surface of a material is provided. The method includes receiving, at a computer, an elastic deformation range and a plastic deformation range of the material. The method also includes modeling a region of the material with a mesh. The mesh includes a plurality of elements. The method also includes determining, by performing a finite element analysis on the mesh by the computer, a displacement for at least one point on each of the elements. The displacement results from a set of modeled boundary conditions. The finite element analysis includes recurrently approximating the modulus of elasticity for each element according to the elastic deformation range and the plastic deformation range. The act of approximating is based on a value of strain calculated from a previously calculated element displacement.

Il est question, dans un mode de réalisation de cette invention, d'un procédé permettant d'évaluer les déformations subies par la surface d'un matériau. Ce procédé consiste à entrer dans un ordinateur une plage de déformation élastique et plastique du matériau. Il consiste également à modéliser une zone de ce matériau avec une grille comportant plusieurs éléments. Il consiste, en outre, à déterminer, au moyen d'une analyse informatique d'un élément fini sur la grille, un déplacement d'au moins un point sur chaque élément. Le déplacement est dérivé d'un ensemble de conditions limites modélisées. L'analyse de cet élément fini comporte un une approximation récurrente du module d'élasticité de chaque élément en fonction des déformations, élastique et plastique, du matériau. L'approximation est fondée sur une valeur de contrainte calculée d'après un déplacement d'élément précédemment calculé.

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