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IMMC

Jérémy Chevalier
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Funding: FRIA
Supervisor(s): Thomas Pardoen

Carbon fiber reinforced polymers (CFRP) are widely used in structural applications where weight is a critical factor. However, the lack of generic tools to accurately predict their failure must be compensated by heavy experimental campaigns to ensure the safety of the structures, increasing their cost. Hence, the goal of this thesis is to provide a precise understanding of the deformation and failure mechanisms of CFRP constituents in order to serve as a basis of a bottom-up approach.
Regarding the matrix, a detailed analysis of both the fracture and viscoplastic behavior is peformed to understand the underlying mechanisms responsible for its apparent mechanical behavior. In particular, a fracture criterion has been identified and validated under a large range of stress triaxialities, providing a unique failure mechanism for highly cross-linked epoxy resins. Regarding viscoplasticity, the so-called shear transformation zone (STZ) framework is used as a modelling approach to account for the nanoscale heterogeneity controlled mechanical response of glassy polymers. In parallel, macroscopic and insitu tests in a scanning electron microscope on a unidirectional composite are used to unveil the influence of the fibers on epoxy resins behavior when used as a matrix in CFRP. Lastly, nanoindentation is used both to characterize the microscale mechanical behavior of RTM6 and to perform push-out tests on single carbon fibers embedded in a polymer matrix to obtain direct a measurement of the interfaces properties.

IMMC main research direction(s):
Processing and characterisation of materials
Solid mechanics

Keywords:
composite
micromechanics
plasticity
polymer

Research group(s): IMAP

    

Recent publications

See complete list of publications

Journal Articles


1. Chevalier, Jérémy; Camanho, P.P.; Lani, Frédéric; Pardoen, Thomas. Multi-scale characterization and modelling of the transverse compression response of unidirectional carbon fiber reinforced epoxy. In: Composite Structures, Vol. 209, p. 160-176 (2019). doi:10.1016/j.compstruct.2018.10.076. http://hdl.handle.net/2078.1/204609

2. Chevalier, Jérémy; Morelle, X.P.; Camanho, P.P.; Lani, Frédéric; Pardoen, Thomas. On a unique fracture micromechanism for highly cross-linked epoxy resins. In: Journal of the Mechanics and Physics of Solids, Vol. 122, p. 502-519 (2019). doi:10.1016/j.jmps.2018.09.028. http://hdl.handle.net/2078.1/203830

3. Chevalier, Jérémy; Brassart, Laurence; Lani, Frédéric; Bailly, Christian; Pardoen, Thomas; Morelle, Xavier. Unveiling the nanoscale heterogeneity controlled deformation of thermosets. In: Journal of the Mechanics and Physics of Solids, Vol. 121, no.1, p. 432-446 (2018). doi:10.1016/j.jmps.2018.08.014. http://hdl.handle.net/2078.1/202017

4. Morelle, Xavier; Chevalier, Jérémy; Bailly, Christian; Pardoen, Thomas. Mechanical characterization and modeling of the deformation and failure of the highly crosslinked RTM6 epoxy resin. In: Mechanics of Time Dependent Materials, Vol. 21, no. 3, p. 419-454 (2017). doi:10.1007/s11043-016-9336-6. http://hdl.handle.net/2078.1/180406

5. Chevalier, Jérémy; Morelle, Xavier; Bailly, Christian; Camanho, P.P.; Pardoen, Thomas; Lani, Frédéric. Micro-mechanics based pressure dependent failure model for highly cross-linked epoxy resins. In: Engineering Fracture Mechanics, Vol. 158, p. 1-12 (2016). doi:10.1016/j.engfracmech.2016.02.039. http://hdl.handle.net/2078.1/172667


Conference Papers


1. Van Loock, Frederik; Chevalier, Jérémy; Brassart, Laurence. A shear transformation zone model to predict the deformation and failure of glassy polymers in fibre reinforced composites. http://hdl.handle.net/2078.1/226305

2. Pardoen, Thomas; Morelle, Xavier; Chevalier, Jérémy; Klavzer, Nathan; Van Loock, Frederik; Lani, Frédéric; Brassart, Laurence; Camanho, P.; Bailly, Christian. Towards more predictive composite models. http://hdl.handle.net/2078.1/226306

3. Chevalier, Jérémy; Morelle, Xavier; Brassart, Laurence; Camanho, P.; Bailly, Christian; Lani, Frédéric; Pardoen, Thomas. Micromechanics of deformation and fracture in highly cross-linked thermosets – impact on composite modelling. In: Book of abstracts - COMPOSITES 2019, 2019, p. P.19. http://hdl.handle.net/2078.1/226414

4. Gayot, Sarah; Bailly, Christian; Pardoen, Thomas; Chevalier, Jérémy; Gérard, Pierre. Relationship between processing parameters and mechanical properties of thick glass fibre reinforced pmma composites. In: Book of Abstract - COMPOSITES 2019, 2019, p. P.81. http://hdl.handle.net/2078.1/226416

5. Breite, Christian; Feyen, V.; Chevalier, Jérémy; Pardoen, Thomas; Lomov, S.V.; Gorbatikh, L.; Swolfs, Y.. Effect of viscoplasticity of the epoxy matrix on long-term stress redistribution around fibre breaks in a composite subjected to high static tensile load. In: Book of abstracts - COMPOSITES 2019, Editors A. Turon, P. Maimi & M. Fagerström, 2019, p. 78. http://hdl.handle.net/2078.1/226328

6. Chevalier, Jérémy; Morelle, Xavier; Camanho, Pedro; Lani, Frédéric; Pardoen, Thomas. Modelling of an epoxy matrix based on the shear transformation zone framework. http://hdl.handle.net/2078.1/199937

7. Brassart, Laurence; Morelle, Xavier; Chevalier, Jérémy; Lani, Frédéric; Bailly, Christian; Pardoen, Thomas. Micromechanics of Highly-Crosslinked Thermosets. http://hdl.handle.net/2078.1/214427

8. Pardoen, Thomas; Morelle, Xavier; Chevalier, Jérémy; Brassart, Laurence; Camanho, P.; Bailly, Christian; Lani, Frédéric. Micromechanics of deformation and fracture in highly cross-linked thermosets and size effects. http://hdl.handle.net/2078.1/214428

9. Pardoen, Thomas; Morelle, Xavier; Chevalier, Jérémy; Brassart, Laurence; Camanho, P.; Bailly, Christian; Lani, Frédéric. Micromechanics of deformation and fracture in highly cross-linked thermosets. http://hdl.handle.net/2078.1/214478

10. Pardoen, Thomas; Morelle, Xavier; Chevalier, Jérémy; Brassart, Laurence; Camanho, P.; Bailly, Christian; Lani, Frédéric. Micromechanics of cross-linked thermosets and application to composite multiscale modelling. http://hdl.handle.net/2078.1/214473


Dissertations


1. Chevalier, Jérémy. Micromechanics of an epoxy matrix for fiber reinforced composites : experiments and physics-based modelling, prom. : Pardoen, Thomas ; Lani, Frédéric, 19/11/2018. http://hdl.handle.net/2078.1/207895