A 3D finite element stochastic framework for the failure of tow-based discontinuous composites

Tow-Based Discontinuous Composites (TBDCs) combine high manufacturability with good mechanical properties. This work presents a novel 3D approach for the numerical modelling of TBDCs. The framework generates 3D orientation tensors by adding a stochastic component to the orientation tensors determini...

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Bibliographic Details
Published inComposites science and technology Vol. 232; p. 109846
Main Authors Alves, M., Martulli, L.M., Kerschbaum, M., Swolfs, Y., Lomov, S.V., Pimenta, S.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 08.02.2023
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Summary:Tow-Based Discontinuous Composites (TBDCs) combine high manufacturability with good mechanical properties. This work presents a novel 3D approach for the numerical modelling of TBDCs. The framework generates 3D orientation tensors by adding a stochastic component to the orientation tensors deterministically predicted by a process simulation. The actual TBDCs are thus idealised as Equivalent Laminates (ELs), resulting from these stochastic tensors. A physically based 3D failure criterion is presented for the prediction of failure initiation of the ELs. The consequent stiffness reduction is captured by a ply-discount method. The approach is validated for two TBDCs materials, with two different moulding conditions and different amounts of in-mould flow. The proposed approach accurately predicts the characteristic variability of these materials. As a consequence, the predicted strength was in good agreement with the experimental results of both materials tested. [Display omitted]
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2022.109846