PSI - Issue 31

F. Kheloui et al. / Procedia Structural Integrity 31 (2021) 140–146

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F. Kheloui et al. / StructuralIntegrity Procedia 00 (2019) 000–000

Table 1. Parameters of concrete Parameters

Denotation

Notation f c (MPa) f c 0 (MPa) f t 0 (MPa) E (MPa)

Values

33.68

Compression stress

20.208 2.6208 36387

Elastic compressive stress Maximum tensile stress

Instantaneous Young's modulus

υ

0.267

Poisson's ratio Expansion angle

ψ a f

32°

1.16

Biaxial / uniaxial stress

0.1

Potential flow parameter

a e

Table 2. PP fabric parameter Parameters

Value 80000 15000 0.295

Denotation

E1(MPa) E2(MPa)

Longitudinal Young's modulus Young's transverse module

υ12

Poisson's ratio Shear modulus

G12(MPa)

400

2.2. Specimens meshing Based on finite element method, modeling of geometrical specimens is conducted in full 3D nonlinear finite element analysis. After identifying parameters and geometrical properties of polypropylene fabric and cylinder elements mesh sensitivity is performed. Concrete solid is meshed in the sensitive zones to failure, with 20 mm tetrahedral finite element (3D) models, with the Lagrange formulation (C3D8). An anisotropic formulation has been adopted for polypropylene fabric, which were modeled with 10 mm 2D quadratic finite elements and four nodes with 8 degrees of freedom. The meshing configurations of specimens are depicted in Fig. 1.

Fig. 1. Mesh of the cylinder and the fabric .