A hyperelastic material model considering biaxial coupling of tension–compression and shear for the forming simulation of woven fabrics

Schäfer, Florian; Werner, Henrik O.; Henning, Frank; Kärger, Luise

doi:10.1016/j.compositesa.2022.107323

Cited by 16 publications

(16 citation statements)

References 47 publications

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“…The hypervisco-elastic in-plane membrane model [18] has not been explicitly characterized for the here applied glass fiber textile. Yet, its prediction on the here-applied geometry has been compared to a membrane model designed for the used material [19]. A pre-study showed comparable fiber orientation, which is reasonable as the geometry is relatively simple and does not induce defects or shear looking.…”

Section: Process Simulation Modelmentioning

confidence: 95%

Modeling of 3D fluid-structure-interaction during in-situ hybridization of double-curved fiber-metal-laminates

Poppe

2023

Materials Research Proceedings

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Abstract. Fiber-metal-laminates (FML) provide excellent fatigue behavior, damage-tolerant properties, and inherent corrosion resistance. A 2017-developed single-step process that combines deep-drawing with simultaneous infiltration (in-situ-hybridization) yields promising results. However, Fluid-Structure-Interaction (FSI) between the hybrid stack and the fluid pressure complicated the defect-free processing of double-curved parts. In this work, a Finite Element (FE) simulation approach for modeling the in-situ hybridization of FMLs is expanded to incorporate a both-sided (strong) FSI, aiming to facilitate apriori virtual support for process- and part development. Using Terzaghi's effective stress formulation, the proposed framework can predict metal sheet buckling and resin accumulation resulting from local fluid pressure during infiltration of the textile interlayers on part level. Different conditions are simulated, outlining the high relevance of considering strong FSI during process simulation. The part-level results are compared with experimental findings. Modeling challenges are discussed, along with suggested future enhancements of the simulation approach.

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Section: Process Simulation Modelmentioning

confidence: 95%

Modeling of 3D fluid-structure-interaction during in-situ hybridization of double-curved fiber-metal-laminates

Poppe

2023

Materials Research Proceedings

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“…In the context of fiber-metal-laminate (FML) forming, Schäfer et al [21] have introduced an invariant-based model, which considers both biaxial and normal-shear coupling, but not just for positive strains (i.e. tension), but also for negative strains.…”

Section: Introductionmentioning

confidence: 99%

“…The additional consideration of compressive strains in biaxial and normal-shear coupling becomes necessary, if wrinkling is suppressed during forming, e.g. due to adjacent metal layers as in FML forming, but also due to blank holders or grippers [21]. Under such constrained condition in thickness direction, the bending and wrinkling behavior becomes insignificant compared to the complexly interacting components of the membrane behavior, namely shear, tension and compression [22,23].…”

Section: Introductionmentioning

confidence: 99%

“…In the present work, the invariant-based constitutive model presented by Schäfer et al [21] is used to evaluate the significance of different strain couplings in forming simulation at component scale. For that purpose, the invariants that control the couplings in the different components of the strain energy densities are activated or suppressed in different combinations.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the effects are compared for strongly constrained forming of FML and less constrained forming of a pure fabric laminate. First, the material [21] is summarized with the most essential equations to indicate the interactions that are considered in the strain energy density components. Subsequently, the numerical test case, a tetrahedron geometry, and the applied materials are introduced.…”

Section: Introductionmentioning

confidence: 99%

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Modeling multiaxial stress states in forming simulation of woven fabrics

Kärger

2023

Materials Research Proceedings

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Abstract. During the forming of woven fabrics, different multiaxial stress states can occur, depending on the given process conditions and the complex deformation mechanisms of the interwoven structure of the textile. Particularly under constrained forming conditions, induced e.g. by blank holders or by adjacent metal layers in fiber-metal-laminate (FML) forming, the multiaxial stress states may include in-plane compression. A hyperelastic, invariant-based constitutive model has been proposed in previous work to consider such biaxial and normal-shear coupling for both positive and also negative strains. In the present work, this constitutive model is applied to forming simulation at component scale to investigate the significance of individual coupling aspects for the prediction of the forming behavior under different multiaxial stress states. For that purpose, FMLs and pure fabric laminates are formed to a tetrahedron geometry. In a comparative simulation study, the individual strain couplings of the invariant-based material model are differently activated or suppressed. The simulation results reveal that biaxial coupling has a significant effect on the draping behavior, if the draping is partially constrained. In contrast, the coupling effects are much smaller for free draping conditions.

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Macroscopic Forming Simulation for a Unidirectional Non-crimp Fabric Using an Anisotropic Hyperelastic Material Model

Ghazimoradi,

Montesano

2023

Appl Compos Mater

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A hyperelastic material model considering biaxial coupling of tension–compression and shear for the forming simulation of woven fabrics

Cited by 16 publications

References 47 publications

Modeling of 3D fluid-structure-interaction during in-situ hybridization of double-curved fiber-metal-laminates

Modeling of 3D fluid-structure-interaction during in-situ hybridization of double-curved fiber-metal-laminates

Modeling multiaxial stress states in forming simulation of woven fabrics

Macroscopic Forming Simulation for a Unidirectional Non-crimp Fabric Using an Anisotropic Hyperelastic Material Model

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