5. C modeling#
5.1. Characteristics of modeling#
Same as modeling A except for the 3D_ INCO_UPG elements.
5.2. Characteristics of the mesh#
Number of knots: 9967
Number of meshes and type: 864 PENTA15 and 1568 HEXA20
The characteristic length of an element near the crack bottom is \(\mathrm{0,06}m\).
The middle nodes of the edges of the elements touching the bottom of the crack are moved to a quarter of these edges.
5.3. Tested sizes and results#
The theta field integration crowns for command CALC_G are:
\(\text{RINF}\mathrm{=}\mathrm{0,1}m\) and \(\text{RSUP}\mathrm{=}\mathrm{0,5}m\).
We choose a LINEAIRE type of straightening.
The parameter ABS_CURV_MAXI of the POST_K1_K2_K3 operator is chosen so as to retain 5 nodes on the extrapolation segment.
To test the value of \({K}_{I}\) for all points at the bottom of the crack, we test the \(\mathit{min}\) and the \(\mathit{max}\) values along the bottom.
\({K}_{\mathit{II}}\) is tested only to the point where \(\omega \mathrm{=}0°\) (where \({K}_{\mathit{II}}\) is normally maximum).
\({K}_{\mathit{III}}\) is tested only to the point where \(\omega \mathrm{=}90°\) (where \({K}_{\mathit{III}}\) is normally maximum).
Theoretically, you should test the absolute value of \({K}_{\mathit{II}}\) and \({K}_{\mathit{III}}\) because the sign is arbitrary.
5.3.1. Values from CALC_G#
The values are in \(\mathit{Pa}\mathrm{.}\sqrt{m}\) obtained from the SSLV154A test case.
Identification |
Reference Type |
Reference Value |
% Tolerance |
\(\mathit{max}({K}_{I})\) |
“ANALYTIQUE” |
8,361 105 |
|
\(\mathit{min}({K}_{I})\) |
“ANALYTIQUE” |
8,361 105 |
|
\({K}_{\mathit{II}}\) in \(\omega \mathrm{=}0°\) |
“ANALYTIQUE” |
8,644 105 |
|
\({K}_{\mathit{III}}\) in \(\omega \mathrm{=}90°\) |
“ANALYTIQUE” |
6,747 105 |
|