3. Modeling

3.1. Characteristics of modeling

Law of elasto-plastic behavior (” VMIS_ISOT_TRAC “)

Charging:

Pressure \(P\) on the inner wall and the corresponding background effect.

\(P=36.97\mathit{MPa}\)

Next bending moment (\(-Y\)) distributed over the face of the upper pipe.

\(M=-5989.46\mathit{kNm}\) where \(M\) is the moment on the \(Y\) axis.

3.2. Characteristics of the mesh

Number of knots: 53794

Number of meshes and types:

3D_SI: 8605 TETRA10 and 8425 HEXA20

3D: 240 PENTA15, 290 PYRAM13

3.3. Tested sizes and results

The value tested is the local energy recovery rate \({J}_{\text{fond}}\) on the node at the bottom of the crack. (option G from CALC_G). This value is tested for an integration ring defined by NB_COUCHE_INF =2 and NB_COUCHE_SUP =5.

Identification	Reference	Calculated value e	\(\text{\%}\) tolerance
\({J}_{\text{fond}}(\mathit{KJ}/m\mathrm{²})\)	271.0	272.147	1