# Metafor

ULiege - Aerospace & Mechanical Engineering

team:gdeliege

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 team:gdeliege [2015/08/11 11:02]geoffrey team:gdeliege [2016/03/30 15:23] Line 1: Line 1: - {{ :team:geoffrey_deliege.jpg?cache=120|Geoffrey}} - - ====== Geoffrey DELIEGE ====== - - Research engineer - - ===== Contact ===== - - //E-mail// : [[geoffrey.deliege@ulg.ac.be]] \\ - //Phone// : +32 (0)4 366 95 91 \\ - //Address// : Université de Liège - Aerospace and Mechanics \\ - Quartier Polytech 1 - B52/3 (office +2/541) \\ - Allée de la Découverte 13 A \\ - B-4000 Liège, BELGIUM  \\ - - ===== Research activities ===== - - ==== Composite materials ==== - - Carbon-Fibre-Reinforced Polymers (CFRP) are now widely used in aerospace industry - thanks to their high strength-to-weight ratio. - However, the numerical simulation of CFRP laminates up to failure is not trivial: - laminates have anisotropic mechanical properties and - laminate damage results from a combination of microscopic mechanisms - (fibre brittle failure, fibre-matrix debonding, matrix ductile failure and delamination) - that are not easily described at a macroscopic level. - - My objective was to implement a material model for composite plies with woven fibre - reinforcement in Metafor. - This model is inspired by the meso-model - proposed by P. Ladevèze and O. Allix [1-2] for unidirectional - composites as well as the 2D model for woven composites proposed by C. Hochard [3]. - - The idea is to describe the laminate as a stack of 3D orthotropic plies separated by 2D interfaces. - In a direction parallel to the fibres, - the plies are elastic and subject to brittle fracture; - in shear, an elastoplastic behaviour is assumed and progressive damage is introduced. - The 2D interfaces between the plies are elastic with progressive damage. - Practical information on the - [[doc:user:elements:volumes:ortho_hypo_materials|orthotropic materials]] - and - [[doc:user:elements:volumes:ortho_continuousdamage|damage evolution laws]] - is available on the Metafor web page. - - One interesting feature of Ladevèze and Allix's work is that most parameters of the constitutive laws - can be linked to physical quantities. - Therefore, these parameters can be identified with suitable experimental tests. - - {{ :team:gdeliege:stiffener2d.png?direct |Finite element simulation (Metafor) of an impacted stiffener made of woven carbon fibre laminate}} - - == References == - - [1] P. Ladevèze, E. Le Dantec. //Damage modelling of the elementary ply for laminated composites.// Composites Science and Technology, Vol. 43, pp. 257-267, 1992 \\ - [2] O. Allix, P. Ladevèze. //Interlaminar interface modeling for the prediction of laminate delamination.// Composite Structures, Vol. 22, pp. 235-242, 1992 \\ - [3] C. Hochard, P.-A. Aubourg, J.-P. Charles. //Modelling of the mechanical behaviour of woven-fabric CFRP laminates up to failure//. Composites Science and Technology, Vol. 61, pp. 221–230, 2001 \\ - - ==== Shearography ==== - [[team:gdeliege:shearo]] - - - ===== Publications ===== - - -
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