Method for simulating the behavior of a bonded joint of two...

G - Physics – 06 – F

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G06F 17/50 (2006.01)

Patent

CA 2712434

The invention relates to a method for simulating the behavior of a bonded 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 all the relevant information for analyzing said structural joint; b) Providing a calculation model for calculating the deformations of the adhesive material layer (13) when it is subjected to tensile/peel and shear stresses, including a plastic behavior of the adhesive of a linear type under tension/peeling and of a non-linear type under shearing; c) Simulating the behavior of said bonded joint by applying said calculation model to obtain the failure indices of each failure mode. The invention also relates to a system which is useful as an aid in the design of said structural joint using a computer-implemented Finite Element Model of said structural joint.

L'invention porte sur un procédé pour simuler le comportement d'un joint collé de deux parties de matériaux composites (11, 15) avec une couche de matériau adhésif (13), le procédé comprenant les étapes suivantes : a) la fourniture à un modèle à éléments finis de toutes les informations pertinentes pour analyser ledit joint structurel ; b) la disposition d'un modèle de calcul pour calculer les déformations de la couche de matériau adhésif (13) lorsqu'elle est soumise à des contraintes de traction/décollement et de cisaillement, y compris un comportement plastique de l'adhésif d'un type linéaire sous tension/décollement et d'un type non linéaire sous cisaillement ; c) simuler le comportement dudit joint collé à l'aide dudit modèle de calcul pour obtenir les indices de défaillance de chaque mode de défaillance. L'invention porte également sur un système qui est utile en tant qu'assistant dans la conception dudit joint structurel à l'aide d'un modèle à éléments finis mis en uvre par ordinateur dudit joint structurel.

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