Berke, P.

Lani, F.

Massart, T.

Wintiba, B.

Scipedia

8th ECCOMAS Thematic Conference on the Mechanical Response of Composites: COMPOSITES 2021M. Fagerström & G. Catalanotti (Editors)IDENTIFICATION AND DRAPABILITY OF HIGH PERFORMANCETHERMOPLASTIC UD COMPOSITES FOR AERONAUTICALAPPLICATIONBadadjida Wintiba1∗, Péter Z. Berke1, Frederic Lani2 and Thierry J. Massart1∗1 Université libre de Bruxelles (ULB), Building, Architecture & Town Planning (BATir) Dept. CP194/02, Avenue F.D. Roosevelt 50, 1050 Bruxelles, Belgium2 Solvay S.A., 1120 Bruxelles, Belgium∗ bwintiba@ulb.ac.beThe use of fiber reinforced thermoplastics in the aircraft industry has been growing for decadesdue to their good strength/weight ratio. Thermoplastic UD composites exhibit a complex ma-terial behavior that is in part linked to their manufacturing process, and this makes their exper-imental identification very intricate. This motivates the use of coupled experimental-numericalinvestigations to characterize them. In the present computational modeling based contribu-tion, the generalized Maxwell viscoelastic material behavior is used for forming simulationsof APC thermoplastic composites. The APC thermoplastic composite is first idientified andthen its in-plane shear and out of plane bending bevior are validated befor the finite elementsforming simulations. In order to match the experimentally observed behavior of the materialduring forming operation, the membrane and bending stiffness are uncoupled in the formingsimulations, as proposed in [1]. This uncoupling is performed through the use of dedicated su-perimposed shell and membrane finite elements combined with user subroutines in Abaqus, asillustrated in Figure 1. The results of full forming simulations of UD composites are comparedqualitatively and quantitatively to experimental/numerical data available in the literature.Figure 1: (a) Forming model, the thermoplastic UD composite is shown below, the stamp is shown in blue. (b)Superimposed shell and membrane finite elements employed to model the composite.References[1] D. Dörr and F. J. Schirmaier and F. Henning and L. Kärger (2017) A viscoelastic ap-proach for modeling bending behavior in finite element forming simulation of continu-ously fiber reinforced composites. Composites Part A: Applied Science and Manufactur-ing, 94, pp.113-123.

Identification and Drapability of High Performance Thermoplastic UD Composites for Aeronautical Application

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Identification and Drapability of High Performance Thermoplastic UD Composites for Aeronautical Application

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