Issam Doghri
Recent publications

Research group(s): MEMA

PhD and Post-doc researchers under my supervision:

Finite strain modelling of polymers and continuous fiber reinforced composites
Muralidhar Reddy Gudimetla

The main thesis goal is to efficiently integrate the constitutive models of resin, fiber and fiber/matrix interface into a mulit-scale approach to predict the behavior of an uni-directional carbon-epoxy composite ply. This would require an efficient constitutive model for the resin/polymer which would address the experimentally observed features like strain-rate, temperature and pressure-dependency. So, an isotropic thermodynamically based fully coupled viscoelastic-viscoplastic model formulated under finite strain transformations was developed considering isothermal conditions, which is further extended to an anisotropic version suitable for structural composites. This model would be implemented in a multi-scale approach, with corresponding models for fiber and fiber/matrix interface, to predict softening/degradation in an uni-directional composite ply.

Mechanical fatigue in 3D printed meta-materials
Darith Hun

is a Civil and Mechanical Engineering PhD graduated in 2020 at Paris-Est University, working on crack propagation in clay material with french (MSME & Navier) and US(CEE, Duke university) labs. Now, he started a new european postdoc on the characterization of the geometry and nonlinear mechanical behavior of metamaterials(SLS technology), his research focuses on the mechanical fatigue aspect based on numerical simulation and experimental comparison

Recent publications

See complete list of publications

Journal Articles

1. El Ghezal, Marieme Imene; Doghri, Issam; Kondo, Djimédo. Static Limit Analysis and strength of porous solids with Hill orthotropic matrix. In: International Journal of Solids and Structures, Vol. 109, no.0, p. 63-71 (2017). doi:10.1016/j.ijsolstr.2017.01.007.

2. Krairi, A.; Doghri, Issam; Robert, G. Multiscale high cycle fatigue models for neat and short fiber reinforced thermoplastic polymers. In: International Journal of Fatigue, Vol. 92, p. 179-192 (2016). doi:10.1016/j.ijfatigue.2016.06.029.

3. Doghri, Issam; El Ghezal, Marieme Imene; Adam, Laurent. Finite strain mean-field homogenization of composite materials with hyperelastic-plastic constituents. In: International Journal of Plasticity, Vol. 81, p. 40-62 (june 2016). doi:10.1016/j.ijplas.2016.01.009.

4. Wu, L.; Doghri, Issam; Noels, L. An incremental-secant mean-field homogenization method with second statistical moments for elasto-plastic composite materials. In: Philosophical Magazine, Vol. 95, no. 28-30, p. 3348-3384 (2015). doi:10.1080/14786435.2015.1087653.

5. Wu, L.; Sket, F.; Molina-Aldareguia, J.M.; Makradi, A.; Adam, L.; Doghri, Issam; Noels, L. A study of composite laminates failure using an anisotropic gradient-enhanced damage mean-field homogenization model. In: Composite Structures, Vol. 126, p. 246-264 (2015). doi:10.1016/j.compstruct.2015.02.070.

6. Haouala, Sarra; Doghri, Issam. Modeling and algorithms for two-scale time homogenization of viscoelastic-viscoplastic solids under large numbers of cycles. In: International Journal of Plasticity, Vol. 70, no.1, p. 98-125 (July 2015). doi:10.1016/j.ijplas.2015.03.005.

7. Kammoun, Slim; Doghri, Issam; Brassart, Laurence; Delannay, Laurent. Micromechanical modeling of the progressive failure in short glass–fiber reinforced thermoplastics – First Pseudo-Grain Damage model. In: Composites Part A: Applied Science and Manufacturing, Vol. 73, p. 166-175 (2015). doi:10.1016/j.compositesa.2015.02.017.

8. Krairi, Anouar; Doghri, Issam. A thermodynamically-based constitutive model for thermoplastic polymers coupling viscoelasticity, viscoplasticity and ductile damage. In: International Journal of Plasticity, Vol. 60, p. 163-181 (2014). doi:10.1016/j.ijplas.2014.04.010.

9. Selmi, Abdellatif; Hassis, Hedi; Zenzri, Hatem; Doghri, Issam. A Cosserat-type plate theory and its application to carbon nanotube microstructure. In: American Journal of Applied Sciences, Vol. 11, no. 8, p. 1255-1273 (2014). doi:10.3844/ajassp.2014.1255.1273.

10. Wu, L.; Noels, L.; Adam, L.; Doghri, Issam. An implicit-gradient-enhanced incremental-secant mean-field homogenization scheme for elasto-plastic composites with damage. In: International Journal of Solids and Structures, Vol. 50, no. 24, p. 3843-3860 (2013). doi:10.1016/j.ijsolstr.2013.07.022.

Conference Papers

1. El Ghezal, Marieme Imene; Doghri, Issam. Large Deformation Mean-Field Homogenization of Inclusion-Reinforced Elasto-Viscoplastic Composites. 2015 xxx.

2. El Ghezal, Marieme Imene; Doghri, Issam; Kondo, Djimedo. Approximate lower bound yield criterion for anisotropic porous solids. 2014 xxx.

3. El Ghezal, Marieme Imene; Doghri, Issam. Micromechanical Modeling of Porous Solids. In: Poromechanics V: Proceedings of the Fifth Biot Conference on Poromechanics, American Society of Civil Engineers, 2013, 978-0-7844-1299-2 xxx. doi:10.1061/9780784412992.206.

4. Haouala, Sarra; Doghri, Issam. Two-scale Time Homogenization for Isotropic Viscoelastic- Viscoplastic Homogeneous Solids Under Large Numbers of Cycles. 2013 xxx. doi:10.1016/j.proeng.2013.12.111.

5. Melchior, Maxime; Lani, Frédéric; Morelle, Xavier; Brassart, Laurence; Doghri, Issam; Pardoen, Thomas. Non-linear micromechanics based analysis of a satin5 representative single ply volume element. 2013 xxx.

6. André, Simon; Melchior, Maxime; Morelle, Xavier; Dumont, D.; Destoop, Vincent; Doneux, Catherine; Delannay, Laurent; Doghri, Issam; Daoust, Daniel; Bailly, Christian; Pardoen, Thomas. Local approach of fracture of HexFlow®RTM6 structural epoxy with thermoplastic and nanofillers additions. In: CD-Rom, Elesevier, 2011, p. réf. 123 xxx.

7. Kammoun, Slim; Brassart, Laurence; Robert, G.; Doghri, Issam; Delannay, Laurent. Micromechanical modeling of short glass-fiber reinforced thermoplastics-Isotropic damage of pseudograins. In: AIP Conference Proceedings. Vol. 1353, p. 972-977 (2011). 2011 xxx. doi:10.1063/1.3590697.

8. Adam, L.; Delaere, K.; Kaszacs, M.; Ge rard, J.-S.; Assaker, R.; Doghri, Issam. Multi-scale modeling of polymer nanocomposites. In: Nanotechnology 2009: Life Sciences, Medicine, Diagnostics, Bio Materials and Composites 2009. NSTI Nanotechnology Conference and Expo, Nano science and technology institute, 2009, 978-1-4398-1783-4, p. 515-518 xxx.

9. Brassart, Laurence; Doghri, Issam; Delannay, Laurent. Self-consistent modeling of DP steel incorporating short range interactions. In: International Journal of Material Forming. Vol. 2, no. 0, p. 447-450. 2009 xxx.

10. Ouaar, Amine; Doghri, Issam; Delannay, Laurent; Thimus, Jean-François. Micromechanics of the deformation and damage of steel fiber-reinforced concrete. In: International Journal of Damage Mechanics. Vol. 16, no. 2, p. 227-260 (2007). Sage Publications Ltd: London, 2007 xxx. doi:10.1177/1056789506064946.

Book Chapters

1. Maalej, Yamen; El Ghezal, Marieme Imene; Doghri, Issam. Elasticity and Viscoelasticity of Open Cellular Material: Micromechanical Approach. In: Design and Modeling of Mechanical Systems , Springer Berlin Heidelberg, 2013. 978-3-642-37143-1. xxx xxx. doi:10.1007/978-3-642-37143-1.

2. El Ghezal, Marieme Imene; Doghri, Issam. Micromechanical Modeling of Porous Solids. In: Poromechanics V , xxx, 2013, 1736-1745. 978-0-7844-1299-2. xxx xxx. doi:10.1061/9780784412992.206.