Patent ID: 8229717
Filing Date: 2012-07-24
Classification: G06F

Abstract:
1. A computer-aided method aiding in a design of a structural joint of two composite material parts ( 11 , 15 ) with an adhesive material layer ( 13 ), comprising the following steps: a) providing a Finite Element Model with information for analyzing said structural joint; b) providing a calculation model for calculating deformations of the adhesive material layer ( c) simulating a behavior of said structural joint as bonded by applying the calculation model to obtain failure indices of each failure mode, wherein plastification criteria taking into account hydrostatic stress simulate in an approximate manner the effect that the tensile stresses have in the plastification process based on generation and coalescence of microcavities when large volumetric deformations occur in the adhesive material layer, and wherein said method includes calculating rigidity matrices of each element, and once the rigidity matrix of each element has been calculated in local axes, it is changed to global axes, after which the rigidity matrices of all the elements are assembled in order to obtain a global rigidity matrix of the structure.