A thermomechanical interface description and its application to yarn pullout tests

Fleischhauer, Robert; Qinami, Aurel; Hickmann, Rico; Diestel, Olaf; Götze, Thomas; Cherif, Chokri; Heinrich, Gert; Kaliske, Michael

doi:10.1016/j.ijsolstr.2015.04.030

Cited by 17 publications

(6 citation statements)

References 20 publications

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“…In the FEM, truss elements are widely used to model reinforcements. However, beam elements and continuum elements are also employed, depending on the purpose of the simulation and the required accuracy (Fleischhauer et al, 2015;Fuchs et al, 2020;Mahmoud, 2016).…”

Section: Coupling the Gimp Methods With Truss Finite Elementsmentioning

confidence: 99%

A coupled implicit material point-finite element method for modeling reinforced materials

Chihadeh

Kaliske

2022

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PurposeThis paper aims to introduce a method to couple truss finite elements to the material point method (MPM). It presents modeling reinforced material using MPM and describes how to consider the bond behavior between the reinforcement and the continuum.Design/methodology/approachThe embedded approach is used for coupling reinforcement bars with continuum elements. This description is achieved by coupling continuum elements in the background mesh to the reinforcement bars, which are described using truss- finite elements. The coupling is implemented between the truss elements and the continuum elements in the background mesh through bond elements that allow for freely distributed truss elements independent of the continuum element discretization. The bond elements allow for modeling the bond behavior between the reinforcement and the continuum.FindingsThe paper introduces a novel method to include the reinforcement bars in the MPM applications. The reinforcement bars can be modeled without any constraints with a bond-slip constitutive model being considered.Originality/valueAs modeling of reinforced materials is required in a wide range of applications, a method to include the reinforcement into the MPM framework is required. The proposed approach allows for modeling reinforced material within MPM applications.

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Section: Coupling the Gimp Methods With Truss Finite Elementsmentioning

confidence: 99%

A coupled implicit material point-finite element method for modeling reinforced materials

Chihadeh

Kaliske

2022

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“… a) Grenzschichtelemente im Modell, b) Gebietsdefinition für Grenzschichten im Kontinuum [6] a) Interface elements, b) domain definitions for interfaces at the continuum [6] …”

Section: Motivationunclassified

“…Aus dem Vergleich von Experiment und Simulation können die Parameter für das kohäsive Schädigungsmodell des Grenzschichtelements ermittelt werden. Der effiziente Einsatz sowohl faser-und garnverstärkter Elastomere als auch bei stahlbewehrtem Beton (unter Berücksichtigung von Reibeffekten in der Verbundschicht) wurde in[6,7] gezeigt. Grenzschichtformulierungen sind flexibel einsetzbar.…”

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Lastfall Impakt – Modellierung hochdynamischer Antworten von Strukturen aus bewehrtem Beton

et al. 2022

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Die Berechnung dynamischer Versagensprozesse in Tragstrukturen ist eine ingenieurtechnische Herausforderung und Triebkraft der methodischen Entwicklung. Im Beitrag werden numerische Modelle für spröden Materialbruch und die partielle Ablösung der Bewehrung bei impulsartiger Bauteilbeanspruchung behandelt. Für das Versagen in Grenzschichten werden Methoden zur Reduktion des Rechenaufwands gezeigt. Grundlegend neue Ansätze sind aus der Forschung zur Rissberechnung hervorgegangen und werden mit einigen Beispielen vorgestellt. Der vorliegende Beitrag wurde am 15. Okt. 2021 im Rahmen des 25. Dresdner Baustatik‐Seminars präsentiert.

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“…In contrast to the models proposed in [ 8 , 13 , 14 ], which describe the interfacial behavior by bond-slip laws in an integral manner and restricted to uniform pull-out scenarios, a local formulation by cohesive zone elements with an appropriate traction-separation law (TSL) is utilized in this work. The formulation of the cohesive zone elements within the framework of the finite element method is based on [ 45 ] and adopted to small strain mechanical problems. The used TSL follows the work of [ 46 , 47 , 48 , 49 ] and takes into account the local three-dimensional damage (debonding), friction and contact effects at the yarn concrete interface.…”

Section: Construction Of a Representative Volume Element For Textimentioning

confidence: 99%

Numerical Mesoscale Analysis of Textile Reinforced Concrete

2020

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This contribution presents a framework for Numerical Material Testing (NMT) of textile reinforced concrete based on the mesomechanical analysis of a Representative Volume Element (RVE). Hence, the focus of this work is on the construction of a proper RVE representing the dominant mechanical characteristics of Textile Reinforced Concrete (TRC). For this purpose, the RVE geometry is derived from the periodic mesostructure. Furthermore, sufficient constitutive models for the individual composite constituents as well as their interfacial interactions are considered, accounting for the particular mechanical properties. The textile yarns are modeled as elastic transversal isotropic unidirectional layers. For the concrete matrix, an advanced gradient enhanced microplane model is utilized considering the complex plasticity and damage behavior at multiaxial loading conditions. The mechanical interactions of the constituents are modeled by an interface formulation considering debonding and friction as well as contact. These individual constitutive models are calibrated by corresponding experimental results. Finally, the damage mechanisms as well as the load bearing behavior of the constructed TRC-RVE are analyzed within an NMT procedure based on a first-order homogenization approach. Moreover, the effective constitutive characteristics of the composite at macroscale are derived. The numerical results are discussed and compared to experimental results.

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A thermomechanical interface description and its application to yarn pullout tests

Cited by 17 publications

References 20 publications

A coupled implicit material point-finite element method for modeling reinforced materials

A coupled implicit material point-finite element method for modeling reinforced materials

Lastfall Impakt – Modellierung hochdynamischer Antworten von Strukturen aus bewehrtem Beton

Numerical Mesoscale Analysis of Textile Reinforced Concrete

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