4. B modeling

4.1. Characteristics of modeling

4.2. Characteristics of the mesh

Number of knots: 169

Number of meshes and type: 36 QUAD9

4.3. Tested values

Identification	Instants	Reference	Aster	% difference
Limit point no. 1
DZ	1.03	—0.0140	—0.0140	—0.01318	—5.886
Eta_ PILOTAGE	1.03	1.0	0.9724	—2.760
Endpoint No. 2
DZ		—0.0171	—0.01702	—0.462
Eta_ PILOTAGE		0.375 0.250	0.101	—67.69
Endpoint No. 3
DZ		—0.0140	—0.0140	—0.01446	3.269
Eta_ PILOTAGE		—0.400 —0.492	—0.558	25.177
Endpoint No. 4
DZ		—0.0161	—0.0161	—0.007
Eta_ PILOTAGE		—0.633	—0.640	1.120

4.4. notes

The calculation strategy used is divided into two steps:

• calculation under imposed load up to \(P=\mathrm{582.N}\) corresponding to 97% of the critical load,

• imposed displacement calculation: then, an imposed displacement is imposed using the imposed arc-length technique (option LONG_ARC in STAT_NON_LINE).

Using the arc-length technique makes it difficult to define the reference value to be entered in the TEST_RESU command, since these values cannot be imposed. To define the reference values, we looked for the values of \(\mathrm{DZ}\) that were as close as possible to those listed in the table in [§2.2] and we reported the values of the control parameter that we had to obtain for the values of \(\mathrm{DZ}\) in question.