This study focused on the contribution of micro-mechanical parameters on the macro-mechanical response of short fiber composites, namely polypropylene matrix reinforced by glass fibers. In the framework of this paper, an attention has been given to the glass fibers length, as micromechanical parameter influences the overall macroscopic material’s behavior. Three dimensional numerical models were developed and analyzed through the concept of a Representative Volume Element (RVE). Results of the RVE-based approach were compared with analytical Halpin-Tsai’s model.<\/p>\r\n","references":"[1]\tFu, Shao-Yun, Bernd Lauke, and Y-W. Mai. Science and engineering of short fibre reinforced polymer composites. Elsevier, 2009.\r\n[2]\tDrugan, W. J., and J. R. Willis. \"A micromechanics-based nonlocal constitutive equation and estimates of representative volume element size for elastic composites.\" Journal of the Mechanics and Physics of Solids 44, no. 4 (1996): 497-524\r\n[3]\tOstoja-Starzewski, Martin. \"Material spatial randomness: From statistical to representative volume element.\" Probabilistic Engineering Mechanics 21, no. 2 (2006): 112-132.\r\n[4]\tHine, Peter J., Hans Rudolf Lusti, and Andrei A. Gusev. \"Numerical simulation of the effects of volume fraction, aspect ratio and fibre length distribution on the elastic and thermoelastic properties of short fibre composites.\" Composites science and technology 62, no. 10 (2002): 1445-1453.\r\n[5]\tPan, Yi, Lucian Iorga, and Assimina A. Pelegri. \"Numerical generation of a random chopped fiber composite RVE and its elastic properties.\" Composites Science and Technology 68, no. 13 (2008): 2792-2798.\r\n[6]\tBennett, Terry, Inna M. Gitman, and Harm Askes. \"Elasticity theories with higher-order gradients of inertia and stiffness for the modelling of wave dispersion in laminates.\" International Journal of Fracture 148, no. 2 (2007): 185-193.\r\n[7]\tKari, S., H. Berger, and U. Gabbert. \"Numerical evaluation of effective material properties of randomly distributed short cylindrical fibre composites.\" Computational Materials Science 39, no. 1 (2007): 198-204.\r\n[8]\tBerger, Harald, Sreedhar Kari, Ulrich Gabbert, Reinaldo Rodr\u00edguez Ramos, Julian Bravo Castillero, and Ra\u00fal Guinovart D\u00edaz. \"Evaluation of effective material properties of randomly distributed short cylindrical fiber composites using a numerical homogenization technique.\" Journal of mechanics of materials and structures 2, no. 8 (2007): 1561-1570.\r\n[9]\tIoannis, Ioannou, Hodzic Alma, Gitman Inna, Soutis Costas, and M. A. Almaadeed. \"Micro-Mechanical Parameters in Short Fibre Composite.\" Applied Composite Materials 21, no. 1 (2014): 197-211.\r\n[10]\tAffdl, J. C., and J. L. Kardos. \"The Halpin\u2010Tsai equations: a review.\" Polymer Engineering & Science 16, no. 5 (1976): 344-352.\r\n[11]\tThomason, J. L. \"The influence of fibre length and concentration on the properties of glass fibre reinforced polypropylene. 6. The properties of injection moulded long fibre PP at high fibre content.\" Composites Part A: Applied Science and Manufacturing 36, no. 7 (2005): 995-1003.\r\n[12]\tHill, Rodney. \"Elastic properties of reinforced solids: some theoretical principles.\" Journal of the Mechanics and Physics of Solids 11, no. 5 (1963): 357-372.\r\n[13]\tVan Mier, J.G., 1996. Fracture processes of concrete (Vol. 12). CRC press.\r\n[14]\tVan Vliet, M.R.A., 2000. Size effect in tensile fracture of concrete and rock. TU Delft, Delft University of Technology.\t","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 119, 2016"}