Print Email Facebook Twitter Micromechanical validation of a mesomodel for plasticity in composites Title Micromechanical validation of a mesomodel for plasticity in composites Author van der Meer, F.P. (TU Delft Applied Mechanics) Date 2016-11-01 Abstract In this paper, the performance of a recent homogenized orthotropic plasticity model for fiber reinforced composites (Vogler et al. (2013)) is investigated by comparing the model response against a micromechanical model. It is assumed that the micromechanical model which contains a recent plasticity model for polymers (Melro et al. (2013a,b)) offers a realistic representation of the plastic deformation of composite materials. Under that assumption, the performance of the homogenized model can be assessed based on the question how well it reproduces micromechanical results. Improved consistent tangent formulations for both plasticity models are presented and a study into the representative volume element size for elasto-plastic micromechanical analysis is performed. Micromechanical simulations of basic load cases are used to generate input for the homogenized model. Next, the response of the two models is compared for a range of different load cases. The loss of accuracy due to necessary simplifications in the homogenized model is quantified in the comparison. These simplifications in the mesomodel include ignoring the stress in fiber direction, disregarding the influence stress orientation under combined longitudinal shear and transverse loading, and the use of a single constant plastic Poisson ratio. Subject Composite laminatesHomogenized modelMicromechanicsPlasticity To reference this document use: http://resolver.tudelft.nl/uuid:5d0f01ba-44ec-4f8e-8395-183dd98b8ff6 DOI https://doi.org/10.1016/j.euromechsol.2016.06.008 Embargo date 2017-09-30 ISSN 0997-7538 Source European Journal of Mechanics A - Solids, 60, 58-69 Part of collection Institutional Repository Document type journal article Rights © 2016 F.P. van der Meer Files PDF ejmsol16.pdf 1.5 MB Close viewer /islandora/object/uuid:5d0f01ba-44ec-4f8e-8395-183dd98b8ff6/datastream/OBJ/view