Numerical Mesoscale Analysis of Textile Reinforced Concrete

Abstract

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.

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

“…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).…”

Numerical Material Testing of Mineral-Impregnated Carbon Fiber Reinforcement for Concrete

“…The bond behavior in the normal direction to the filaments is described with the multilinear normal stress-displacement ratio (Figure 6b). The mechanical behavior of the description of bond behavior in the normal direction has been documented in many research works [8,[34][35][36] and is represented as follows: The bond behavior in the normal direction to the filaments is described with the multilinear normal stress-displacement ratio (Figure 6b). The mechanical behavior of the description of bond behavior in the normal direction has been documented in many research works [8,[34][35][36] and is represented as follows:…”

“…The continuous computational homogenization approach (also called the FE² approach) can be used, in which the microscopic boundary-value problem is coupled with the deformation of the corresponding RVE at a given macroscopic material point and solved via a nested finite element analysis (amongst others [6,7]). Alternatively, the decoupled method can be used, which is presented in [8] and is outlined in Figure 1. In this case, one or more RVEs are analyzed in advance using numerical simulations.…”

Impaktsicherheit von Baukonstruktionen durch mineralisch gebundene Komposite: Materialebene

“…[27] Evaluation process and aggregation levels of a holistic sustainability assessment in the design phase; acc. to Finkbeiner et al [26] and Lepech [27] Bild 13 Schematische Darstellung numerischer mesomechanischer Materialtests an Textilbeton; nach Fuchs et al [25] Illustration of numerical mesomechanical material tests on TRC; adopted from Fuchs et al [25] I. Curosu et al: Mineral-bonded composites for enhanced structural impact safety: material level investigations…”