An invariant-based anisotropic material model for short fiber-reinforced thermoplastics: Coupled thermo-plastic formulation

Dean, Aamir; Reinoso, J.; Sahraee, Shahab; Rolfes, Raimund

doi:10.1016/j.compositesa.2016.06.015

Cited by 38 publications

(13 citation statements)

References 40 publications

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“…For short fiber-reinforced plastics composites sheets, the finite deformation macro-mechanical invariant-based anisotropic elasto-plastic constitutive models are adopted and extended to account for the rate-dependent behavior of composites using a Perzyna type visco-plastic formulation [25][26][27][28][29][30]42]. Herein, the constitutive modeling is briefly described.…”

Section: Constitutive Modelingmentioning

confidence: 99%

“…A detailed description of the numerical treatment and implementation procedure of the model is provided [28][29][30]42]. Herein, for the sake of the conciseness, the description of the algorithmic treatment of the model is omitted.…”

Section: Constitutive Modelingmentioning

confidence: 99%

“…For PA6GF30, the presented constitutive model for SFRP composites in subsection 3.1 is employed. In previous publications [25][26][27][28][29][30]42], these material models are calibrated with experimental data obtained from EN AW 5754 and PA6GF30 for their used in the proposed virtual test-rig. For the sake of completeness, this basic required material parameters are listed.…”

Section: Preprocessingmentioning

confidence: 99%

“…15) six different material tests are needed, namely; (i) 0°uniaxial tension test, (ii) 0°uniaxial compression test, (iii) 90°uniaxial tension test, (iv) 90°uniaxial compression test, (v) in-plane shear test, and (vi) transverse shear test. Following [24,[28][29][30]42], the yield function parameters x i i ¼ 1; 6 ð Þ that characterize the onset of yielding are listed, while the plastic potential function parameters j i i ¼ 1; 4 ð Þ are given, Tables 3, 4. The failure criteria parameters z i i ¼ 1; 6 ð Þ that define the onset of failure are reported, Table 5.…”

Section: Preprocessingmentioning

confidence: 99%

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A FEM‐based virtual test‐rig for hybrid metal‐composites clinching joints

Dean

Rolfes

Grbic

et al. 2019

Materialwissenschaft Werkst

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A 3D FEM-based virtual test-rig tool for the hybrid metal-composites clinching technology is developed and built in the commercial finite element software Abaqus. The proposed tool consists of two modules: a module to simulate the hybrid clinching process and another to predict the strength of the clinched joints. At first, experimental results concerning the hybrid metal-composites (EN AW-5754-PA6GF30) clinching are presented. Then, the developed virtual tool is described in detail outlining the constitutive models implemented for the hybrid pairing sheets as well as illustrating the proposed FE numerical procedures. Later, the developed tool is applied to the hybrid pairing EN AW-5754-PA6GF30. In comparison to the conducted experiments, the simulation results obtained show the applicability and accuracy of the developed virtual testing tool. Keywords: Metal / composites / multi-material design / hybrid clinching / virtual testing / finite element method (FEM) Ein dreidimensionales FEM-basiertes Simulationsmodell zur virtuellen Prüfung von hybriden Clinchverbindungen aus Faser-Kunststoff/Metall-Verbunden wurde entwickelt und in der kommerziellen Finite-Elemente-Software Abaqus aufgebaut. Das Simulationsmodell besteht aus zwei Berechnungsmodulen: Einem zur Simulation des hybriden Clinchprozesses, und einem weiteren zur numerischen Vorhersage der Festigkeit der hybriden Clinchverbindung. Zunächst werden experimentelle Ergebnisse zum hybriden Clinchen der Faser-Kunststoff/Metall-Verbunde (EN AW-5754 / PA6GF30) vorgestellt. Anschließend wird das entwickelte Berechnungsmodell detailliert beschrieben, wobei hier insbesondere auf die konstitutiven Materialmodelle, die für die einzelnen Fügeparameter in Abaqus implementiert worden sind, sowie auf das Simulationsverfahren eingegangen wird. Nach Berechnung des hybriden Clinchprozesses und erfolgreicher Modellvalidierung wird das Berechnungsmodul zur virtuellen Prüfung der Verbindungsfestigkeit angewandt. Durch den Vergleich der Simulationsergebnisse mit den experimentellen Daten wird die Anwendbarkeit und Genauigkeit des hier entwickelten virtuellen Prüfstands aufgezeigt.

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Section: Constitutive Modelingmentioning

confidence: 99%

Section: Constitutive Modelingmentioning

confidence: 99%

Section: Preprocessingmentioning

confidence: 99%

Section: Preprocessingmentioning

confidence: 99%

See 2 more Smart Citations

A FEM‐based virtual test‐rig for hybrid metal‐composites clinching joints

Dean

Rolfes

Grbic

et al. 2019

Materialwissenschaft Werkst

Self Cite

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“…Hence, the need to use numerical modeling came to the fore. This pronounced complexity poses a stern challenge as FRPs pose temperature, pressure, size, and rate dependencies along with the more obvious anisotropic behavior [4,5,6], and progressive failure [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

A Co-Rotational Based Anisotropic Elasto–Plastic Model for Geometrically Non-Linear Analysis of Fibre Reinforced Polymer Composites: Formulation and Finite Element Implementation

2019

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Geometrical non-linearity is one of the aspects to be taken into account for accurate analysis of fibre reinforced polymers (FRPs), since large displacements and rotations may be observed in many of its structural applications such as in aircraft wings and wind turbine blades. In this paper, a co-rotational formulation and implementation of an invariant-based anisotropic plasticity model are presented for geometrically non-linear analysis of FRPs. The anisotropic constitutive equations are formulated in the format of isotropic tensors functions. The model assumes an anisotropic pressure-dependent yield function, and in addition to this, a non-associated plastic potential function in order to model realistic plastic deformations in FRPs. The formulation is then cast in the co-rotational framework to consider the geometrical non-linear effects in an efficient manner. The developed model is implemented in the commercial finite element (FE) software ABAQUS/Implicit via the means of the user-defined material subroutine (UMAT). The kinematics within the co-rotational frame is explained briefly while the important aspects regarding the numerical treatment and implementation are discussed in detail. Representative numerical examples at different scales are presented to demonstrate the applicability and robustness of the proposed development.

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