Estimación de Error Basada en Esfuerzos Generalizados y Tracciones en los Límites

Abstract

The objecti ve of this paper is to present a new method of finite element error estimation. This method is based on the recovery of a continuous stress field. Its behaviour is similar to that of S.P.R., but it is more general and flexible. Nodal values are computed from generalized stresses conjugated to the deformation modes. In the elements situated close to the boundaries where surface traction are prescribed, by using the classical averaging techniques of generalized forces computation, exact boundary conditions on traction are imposed. This method can be used in 1, 2 or three dimensions with any type of displacement model. To show the behaviour of this estimator, two 3-D examples are presented. Effectivity indices and results are analyzed and compared to S.P.R. method results.