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team:gdeliege [2015/08/11 11:02]
geoffrey
team:gdeliege [2016/03/30 15:23]
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-{{ :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 ===== 
- 
-<html> 
-<div align="center"> 
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team/gdeliege.txt · Last modified: 2016/03/30 15:23 (external edit)