Nonintrusive coupling of 3D and 2D laminated composite models based on finite element 3D recovery

In order to simulate the mechanical behavior of large structures assembled from thin composite panels, we propose a coupling technique which substitutes local 3D models for the global plate model in the critical zones where plate modeling is inadequate. The transition from 3D to 2D is based on stress and displacement distributions associated with Saint-Venant problems which are precalculated automatically for a simple 3D cell. The hybrid plate/3D model is obtained after convergence of a series of iterations between a global plate model of the structure and localized 3D models of the critical zones. This technique is nonintrusive because the global calculations can be carried out using commercial software. Evaluation tests show that convergence is fast and that the resulting hybrid model is very close to a full 3D model

Stratégie non-intrusive de couplage plaque/3D pour la simulation des assemblages de plaques composites stratifiées

This thesis is part of the nonintrusive coupling methods framework which allow to merge to kind of software : general commercial software and dedicated software.The aim is to apply such coupling for the analysis of assembly of laminated plates.In fact, the behavior in composite material around critical zones requires to take in account complex phenomena (in 3D), whereas the industrial way of work is to simplify the structure with plate or shell model in order to handle very large structures.The nonintrusive coupling method developed here allow to virtually apply a 3D patch to the plate model in order to enriched the global description without any modification of the global meshes, models, or solver.Various methods of coupling and improvement to the classical nonintrusive coupling are proposed.Cette thèse s'inscrit dans le cadre des méthodes de couplage non-intrusives qui permettent de concilier deux types de logiciels : logiciels commerciaux généralistes et logiciels dédiés. L'objectif est d'appliquer un tel couplage pour le traitement des assemblages de plaques stratifiées.En effet, le comportement aux environs des zones critiques de ces matériaux composites nécessite une prise en compte fine (3D) des phénomènes en jeu alors que la pratique industrielle consiste à représenter les structures par des modèles simplifiés de plaques ou de coques.La méthode non-intrusive développée ici permet ainsi de « patcher » virtuellement le modèle plaque par des modèles 3D locaux, de coupler fortement le modèle global avec les patchs, sans modifier les maillages ni les modèles.Diverses stratégies de raccords sont envisagées, ainsi que des améliorations à la technique de couplage

A nonintrusive plate/3D coupling strategy for the simulation of laminated plates assemblies

Cette thèse s'inscrit dans le cadre des méthodes de couplage non-intrusives qui permettent de concilier deux types de logiciels : logiciels commerciaux généralistes et logiciels dédiés. L'objectif est d'appliquer un tel couplage pour le traitement des assemblages de plaques stratifiées.En effet, le comportement aux environs des zones critiques de ces matériaux composites nécessite une prise en compte fine (3D) des phénomènes en jeu alors que la pratique industrielle consiste à représenter les structures par des modèles simplifiés de plaques ou de coques.La méthode non-intrusive développée ici permet ainsi de « patcher » virtuellement le modèle plaque par des modèles 3D locaux, de coupler fortement le modèle global avec les patchs, sans modifier les maillages ni les modèles.Diverses stratégies de raccords sont envisagées, ainsi que des améliorations à la technique de couplage.This thesis is part of the nonintrusive coupling methods framework which allow to merge to kind of software : general commercial software and dedicated software.The aim is to apply such coupling for the analysis of assembly of laminated plates.In fact, the behavior in composite material around critical zones requires to take in account complex phenomena (in 3D), whereas the industrial way of work is to simplify the structure with plate or shell model in order to handle very large structures.The nonintrusive coupling method developed here allow to virtually apply a 3D patch to the plate model in order to enriched the global description without any modification of the global meshes, models, or solver.Various methods of coupling and improvement to the classical nonintrusive coupling are proposed

Bringing a 3D enrichment model into simplified plate models through a nonintrusive coupling strategy

International audienceno abstrac

A ficticious-like domain approach for the non-intrusive coupling between 2D and 3D models

XFEM 2013 International Conference on Extended Finite Element MethodsInternational audienceno abstrac

Techniques de raccord 2D-3D pour l'analyse non-intrusive de structures composites stratifiées

International audienceno abstrac

Non-intrusive global-local coupling applied to the design of bolted assemblies

X-DMS 2015, extended discretization methodsInternational audienceno abstrac

Efficient non-intrusive coupling technique, with application to the analysis of the delamination of thin composite structures

COUPLED V - 5^th conference on computational methods for coupled problems, Ibiza (Spain)International audienceno abstrac

Non-intrusive coupling: an attempt to merge industrial and research software capabilities

In computational mechanics, it is often difficult to test research innovations on industrial problems because of software limitations: many of the commercial finite element packages commonly used in the industry lack flexibility and openness, whereas in-house research developments are usually very specific and may lack features required for ''real-life'' industrial simulations. Non-intrusive coupling is a tentative answer to this problem. It consists in introducing local enhancements and refinements into an existing industrial problem through a separate nonlinear local model that comes with its own solver; the two models are coupled by the means of an iterative exchange algorithm inspired from domain decomposition methods and multiphysics solution techniques, using both models and solvers without any modification. So far, the method has been implemented around the finite element package Abaqus and has been used to introduce local plasticity and geometric details into a linear elastic global problem. While current developments include the simulation of localized damage in slender composite structures, we think that the method could be adapted to a wide class of problems including hybrid experimental-simulation approaches

Non-intrusive local/global coupling as a Schwarz method: Krylov acceleration and handling of incompatible meshes

X-DMS 2015, extended discretization methodsInternational audienceno abstrac