PSI - Issue 61

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 61 (2024) 206–213

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 Chairman Abstract Structural components made of carbon fiber reinforced plastics (CFRP) exhibit a high degree of lightweight suitability. In order to fulfill geometric and functional requirements, a finishing process step of outer and inner contours is necessary. Near-net-shape blanking processes show potential for economical finishing of CFRP structural components. For the knowledge-based design of a near-net-shape blanking process comparable to fine blanking an understanding of the separation mechanisms during shearing of CFRP laminates is required. Therefore, this paper deals with the development of a finite element (FE) process model for near-net shape blanking of unidirectional (UD) CFRP laminates with different fiber volume fraction and fiber orientation. Material modeling of the UD CFRP laminates was carried out by means of experimental characterization based on tensile, compression and shear tests. The formulation of the material model was implemented using a VUMAT user subroutine. The application of the blank holder and counter force was realized using a kinematic model based on a VUAMP user subroutine. A validation based on experimental near-net-shape blanking tests will be conducted in the next step. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 Keywords: Near-net-shape blanking; Carbon fiber reinforced plastic; Shearing process model Numerical modeling for shearing of unidirectional carbon fiber reinforced plastic laminates by means of near-net-shape blanking T. Stoel a, *, L. Uhlmann a , F. Schweinshaupt a , M. Müller a , T. Herrig a , T. Bergs a,b a Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University, Campus Boulevard 30, 52074 Aachen, Germany b Fraunhofer Institute for Production Technology IPT, Steinbachstraße 17, 52074 Aachen, Germany Abstract Structural components made of carbon fiber reinforced plastics (CFRP) exhibit a high degree of lightweight suitability. In order to fulfill geometric and functional requirements, a finishing process step of outer and inner contours is necessary. Near-net-shape blanking processes show potential for economical finishing of CFRP structural components. For the knowledge-based design of a near-net-shape blanking process comparable to fine blanking an understanding of the separation mechanisms during shearing of CFRP laminates is required. Therefore, this paper deals with the development of a finite element (FE) process model for near-net shape blanking of unidirectional (UD) CFRP laminates with different fiber volume fraction and fiber orientation. Material modeling of the UD CFRP laminates was carried out by means of experimental characterization based on tensile, compression and shear tests. The formulation of the material model was implemented using a VUMAT user subroutine. The application of the blank holder and counter force was realized using a kinematic model based on a VUAMP user subroutine. A validation based on experimental near-net-shape blanking tests will be conducted in the next step. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 Keywords: Near-net-shape blanking; Carbon fiber reinforced plastic; Shearing process model 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Numerical modeling for shearing of unidirectional carbon fiber reinforced plastic laminates by means of near-net-shape blanking T. Stoel a, *, L. Uhlmann a , F. Schweinshaupt a , M. Müller a , T. Herrig a , T. Bergs a,b a Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University, Campus Boulevard 30, 52074 Aachen, Germany b Fraunhofer Institute for Production Technology IPT, Steinbachstraße 17, 52074 Aachen, Germany 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023)

* Corresponding author. Tel.: +49 241 80 28694; fax: +49 241 80 22293. E-mail address: t.stoel@wzl-tf.rwth-aachen.de * Corresponding author. Tel.: +49 241 80 28694; fax: +49 241 80 22293. E-mail address: t.stoel@wzl-tf.rwth-aachen.de

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of IWPDF 2023 Chairman 10.1016/j.prostr.2024.06.027