Instead of writing *ELEMENT_SHELL_COMPOSITE, it is also possible to generate *ELEMENT_SHELL_BETA as output. In this case, the application uses a single initial material orientation that is assumed to be constant throughout the thickness during the simulation. The input information is similar to that for the COMPOSITE option output. SHELL OPTION requires different information and you must specify how the BETA angle should be determined. In other respects, the mapping procedure is similar to the *ELEMENT_SHELL_COMPOSITE option, but postprocessing prior to output of the mapped orientation angles is handled differently. Thicknesses are written to the nodes within the *ELEMENT_SHELL_BETA card.
| NPLANE = INT |
1 - Reduced integrated shell elements. 4 - Fully integrated shell elements. |
| NTHICK = INT | The number of through-thickness integration points in the target mesh. When an even number is provided, and SCALARINT is set to CENTER IP the two integration points closest to the mid-surface are averaged to determine the BETA angle for *ELEMENT_SHELL_BETA output. If an odd number is provided and SCALARINT is set to CENTER IP, the program uses the mid-point as BETA for output. |
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IntegrationRule = Gauss Lobatto Autoform Moldflow Eq_Distr | Define the through-thickness integration rule for the mapping result. This option directly affects the positions of the through-thickness integration points on the target mesh. |
| MapStress = NO | Define whether *INITIAL_STRESS_SHELL cards should be written. For the *ELEMENT_SHELL_COMPOSITE option, set this flag to NO. |
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Thck_Avg_Opt = Ele_Avg Nodal_Avg |
Thickness averaging option. When using *ELEMENT SHELL THICKNESS, nodes may hold different thickness information, depending on the element to which they belong. This is especially critical for components with ribs. With the default setting (Ele Avg), the Envyo application calculates through-thickness integration points using the nodal thicknesses stored on the element nodes by interpolating the resulting thicknesses at the in-plane integration points via shape functions, allowing for the correct calculation of the local through-thickness integration points. By choosing the Nodal Avg option, the application first collects all thicknesses stored on one node from its attached elements and averages these thicknesses. Interpolation to the in-plane integration points using shape functions is then performed. |
| MapMainDir = YES | Activate mapping of main directions to *ELEMENT_SHELL_COMPOSITE cards. |
| TargetThickness = DOUBLE | Define the thickness of the target part. If a SectionFile is included in the source mesh, this value is ignored. If the target mesh already has elements with a thickness value, this option can again be ignored. |
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SCALARINT = AVG CENTER_IP | Define the interpolation method for transferred fiber-orientation angles derived from mapping the orientation tensors. AVG calculates the mean of all the fiber directions assigned to the integration points through the mapping process. CENTER_IP takes the mid-surface integration point information only, or calculates the average of the orientation from the two integration points closest to the mid-surface (see also NTHICK). |
| Shell_Option= Beta |
Activates the output of *ELEMENT_SHELL_BETA fields. |