PSI - Issue 41

Chaaben Arroussi et al. / Procedia Structural Integrity 41 (2022) 752–758 Author name / Structural Integrity Procedia 00 (2019) 000–000

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Table1. Mechanicals properties of the steel API X60, composite and metallic patch, and adhesives. materials APIX60 pipeline Adhesive(FM73)

Composite patch (Bore-epoxy) E px 200 GPa E py 19.6 GPa E pz 19.6 GPa

Adhesive (DC 80 for metallic patch)

Proprieties

E a 0.42 GPa

E s 210 GPa

E a 2383 MPa

Young's modulus

y a 0.3

y s 0.30

y pxz 0.28 y pyz 0.28 y pxy 0.3

y a 0.336

Poisson's ratio

Re

541 MPa 627MPa

Rm

G pxy 7.2GPa G pxz 5.5Gpa G pyz 5.5GPa

Shear modulus

α124.5 α12 23 α12 23

Thermal expansion (10-6 °C)

Table2. Chemical composition of steel API 5L X60 Elements C Si Mn P S

Cr

Ni

Al

Cu

Ti

V

Nb

N

Mo

%

0.007 0.22 1.63 0.01 0.005 0.011 0.011 0.008 0.013 0.010 0.072 0.052 0.008 0.228

Fig1. Nominal stress-engineering strain curve for X60 steel.

1.2. Finite element model

In this work, the FE code ABAQUS was utilized to calculate the capacity of bearing v send rotation of pipe elbow. When the pipeline ends were fixed (Ux, Uy and Uz = 0),in another linear part of the tube edge, the rotation is applied. This rotation movement can damage the structure; the FEM was used to simulate the cracked pipe elbow, the composite patch, and the adhesive. Because of the symmetry, only one-demi of the pipe elbow was taken into account in the modeling. For all the cases studied, the bend is