6. D modeling

6.1. Characteristics of modeling

Law of linear elastic behavior (” ELAS “)

Barsoum elements: OPTION =” NOEUD_QUART “ on the GROUP_NO_FOND =” FRONT_NODES “ using the command MODI_MAILLAGE

Loading: Next bending moment (\(-Y\)) distributed across the face of the upper pipe.

\(M=-5216\mathit{kNm}\) where \(M\) is the moment on the \(Y\) axis.

6.2. Characteristics of the mesh

Number of knots: 40733

Number of meshes and types:

3D_ INCO_UPG: 8865 TETRA10, 5580, 5580 HEXA20 and 240 PENTA15

3D: 295 PYRAM13

6.3. Tested sizes and results

The value tested is the local energy release rate \({J}_{\text{fond}}^{e}\) on the node at the bottom of the crack (option G of 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
\({J}_{\text{fond}}^{e}(\mathit{kJ}/m\mathrm{²})\)	1.91 101	1.94 101	2