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Numerical simulation and experimental investigation of the forming of tailored fibre placement preforms : a mixed embedded-ALE finite element formulation

Abstract : Tailored Fibre Placement (TFP) allows manufacturing flat, net shape fibrous reinforcements with continuously varying orientation and thickness. The hybridisation of TFP and forming is an attractive solution to manufacture mechanically optimized 3D shelllike composite parts. During the forming of complex parts, inevitable fibre path changes occur in the TFP preform. Prediction of the final state of TFP preforms is required to take full advantage of this hybrid solution in the industry.A first numerical modelling strategy is proposed to address the forming of flat TFP preforms. Two semi-discrete models based on an embedded formulation are developed to offer the possibility of removing or keeping the backing material. Both finite element models use an explicit discretisation of the fibre tows using beam elements and assumes no slippage between the preform constituents. Full-scale validations of the model without backing material are successfully addressed by forming hemispherical and tetrahedral parts with final orthotropic orientations. Finally, a mixed embedded element-ALE (Arbitrary Lagrangian Eulerian) formulation is proposed to introduce fibre slippage into the models without modifying their initial ingredients. A parametric study of pull-out experiments is performed to characterize the friction behaviour to be implemented in the models. Numerical validations for TFP preforms and an extension to model fibre slippage in conventional textiles are proposed.
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https://theses.hal.science/tel-03868340
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Submitted on : Wednesday, November 23, 2022 - 5:21:19 PM
Last modification on : Friday, November 25, 2022 - 4:05:08 AM

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  • HAL Id : tel-03868340, version 1

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Jessy Simon. Numerical simulation and experimental investigation of the forming of tailored fibre placement preforms : a mixed embedded-ALE finite element formulation. Mechanical engineering [physics.class-ph]. École centrale de Nantes, 2022. English. ⟨NNT : 2022ECDN0024⟩. ⟨tel-03868340⟩

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