Abstract
This work presents a micromechanical fatigue damage model developed for short glass fiber reinforced PA66. It has been developed to predict the high cycle fatigue behavior of PA66/GF30. The model is based on an extended Mori-Tanaka method which includes coated inclusions, matrix viscoelasticity and the evolution of micro-scale damage. The developed model accounts for the nonlinear matrix viscoelasticity and the reinforcement orientation. The description of the damage processes is based on the experimental investigation of damage mechanisms previously performed through in-situ SEM tests and X-ray micro-computed tomography observations. Damage chronologies have been proposed involving three different processes: interface debonding/coating, matrix micro-cracking and fiber breakages. Their occurrence strongly depends on the microstructure and the relative humidity. Each damage mechanism is introduced through an evolution law coupled to local stress fields. The developed model is implemented using a UMAT subroutine. Its experimental validation is achieved under stress or strain controlled fatigue tests.
Access provided by Autonomous University of Puebla. Download to read the full chapter text
Chapter PDF
Similar content being viewed by others
References
M. F. Arif, F. Meraghni, Y. Chemisky, N. Despringre, G. Robert. In situ damage mechanisms investigation of PA66/GF30 composite: Effect of relative humidity. Composites Part B: Engineering, Volume 58: 487–495, 2014
M. F. Arif, N. Saintier, F. Meraghni, J. Fitoussi, Y. Chemisky, G. Robert. Multiscale fatigue damage characterization in short glass fiber reinforced polyamide-66. Composites Part B: Engineering, Volume 61: 55–65, May 2014
J. L. Chaboche. Continuous damage mechanics: A tool to describe phenomena before crack initiation. Nuclear Engineering and Design, Volume 64: 233–247, 1981.
M. Cherkaoui, H. Sabar, M. Berveiller. Elastic composites with coated reinforcements: A micromechanical approach for nonhomothetic topology. International Journal of Engineering Science, Volume 33: 829–843, 1995
F. Cosmi, A. Bernasconi. Micro-CT investigation on fatigue damage evolution in short fibre reinforced polymers. Composites Science and Technology, Volume 79: 70–76, 2013
F. Desrumaux, F. Meraghni, M. L. Benzeggagh. Generalized Mori-Tanaka Scheme to Model Anisotropic Damage Using Numerical Eshelby Tensor. Journal of Composite Materials, Volume 35: 603–624, 2001
I. Doghri, L. Adam, N. Bilger. Mean-field homogenization of elasto-viscoplastic composites based on a general incrementally affine linearization method. International Journal of Plasticity, Volume 26: 219–238, 2010.
A. C. Gavazzi, D. C. Lagoudas. On the numerical evaluation of Eshelby’s tensor and its application to elastoplastic fibrous composites. Computational Mechanics, Volume 7: 13, 1990
D. C. Lagoudas, A. C. Gavazzi, H. Nigam. Elastoplastic behavior of metal matrix composites based on incremental plasticity and the Mori-Tanaka averaging scheme. Computational Mechanics, Volume 8: 193, 1991
E. Hervé, A. Zaoui. n-Layered inclusion-based micromechanical modelling. International Journal of Engineering Science, Volume 31: 1–10, 1993
Z. Jendli, F. Meraghni, J. Fitoussi, D. Baptiste. Multi-scales modelling of dynamic behaviour for discontinuous fibre SMC composites. Composites Science and Technology, Volume 69: 97–103, 2009
S. Kammoun, I. Doghri, L. Adam, G. Robert, L. Delannay. First pseudo-grain failure model for inelastic composites with misaligned short fibers. Composites Part A: Applied Science and Manufacturing, Volume 42: 1892–1902, 2011
D. Krajcinovic. Continuum damage mechanics. Applied Mechanics Reviews, Volume 37: 1–6, 1984.
A. Launay, M. H. Maitournam, Y. Marco, I. Raoult. Multiaxial fatigue models for short glass fiber reinforced polyamide — Part I: Nonlinear anisotropic constitutive behavior for cyclic response. International Journal of Fatigue, Volume 47: 382–389, 2013
A. Launay, M. H. Maitournam, Y. Marco, I. Raoult. Multiaxial fatigue models for short glass fibre reinforced polyamide. Part II: Fatigue life estimation. International Journal of Fatigue, Volume 47: 390–406, 2013
F. Meraghni, C. J. Blakeman, M. L. Benzeggagh. Effect of interfacial decohesion on stiffness reduction in a random discontinuous-fibre composite containing matrix microcracks. Composites Science and Technology, Volume 56: 541–555, 1996
F. Meraghni, F. Desrumaux, M. L. Benzeggagh. Implementation of a constitutive micromechanical model for damage analysis in glass mat reinforced composite structures. Composites Science and Technology, Volume 62: 2087–2097, 2002
T. Mori, K. Tanaka. Average stress in matrix and average elastic energy of materials with misfitting inclusions. Acta Metall., Volume 21: 571–574, 1973
H. Nouri, F. Meraghni, P. Lory. Fatigue damage model for injection-molded short glass fibre reinforced thermoplastics. International Journal of Fatigue, Volume 31: 934–942, 2009
L. Wu, L. Noels, L. Adam, I. Doghri. A multiscale mean-field homogenization method for fiber-reinforced composites with gradient-enhanced damage models. Computer Methods in Applied Mechanics and Engineering, Volumes 233–236: 164–179, 2012
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 TMS (The Minerals, Metals & Materials Society)
About this paper
Cite this paper
Despringre, N., Chemisky, Y., Robert, G., Meraghni, F. (2015). Micromechanical Fatigue Visco-Damage Model for Short Glass Fiber Reinforced Polyamide-66. In: Karaman, I., Arróyave, R., Masad, E. (eds) Proceedings of the TMS Middle East — Mediterranean Materials Congress on Energy and Infrastructure Systems (MEMA 2015). Springer, Cham. https://doi.org/10.1007/978-3-319-48766-3_48
Download citation
DOI: https://doi.org/10.1007/978-3-319-48766-3_48
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48599-7
Online ISBN: 978-3-319-48766-3
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)