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.

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; Doghri, Issam; Zenzri, Hatem. 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.

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

3. 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.

4. 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. doi:10.1061/9780784412992.206.

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

6. 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). doi:10.1063/1.3590697.

7. 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.

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.

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.

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. 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. 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. doi:10.1061/9780784412992.206.