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How to validate the distribution of 2D element thickness in NX

Community Manager Community Manager
Community Manager

 Quick Overview

Simcenter 3D Engineering Desktop provides several methods to define the thickness of 2D elements, such as derived from a mid-surface, assigned through Element Associated Data or from a physical property table. It is helpful to validate the thickness definition prior to solving your model.

 

This Tips & Trick shows how to display a fem’s 2D element thickness values. In addition, Simcenter 3D lets you create a field of 2D element thicknesses, which you can reuse in the same or different model, on finer or different meshes altogether.

 

Steps

1. Display 2D element thickness
Simcenter 3D offers three different types of display to view and validate the distribution of 2D element thickness in your model.

 

1.1 Thickness Contour
To create a contour plot of 2D elements thickness, in the sim navigator right click on a Mesh collector or an individual mesh and select Plot Thickness Contours.

Figure 1. Plot Thickness Contours.

 

Thickness values are displayed as element-nodal scalar results. When you generate a thickness plot, the post-processing toolbar is enabled, and you can use post-processing tools to view and interrogate element thicknesses. For example, you can use Edit Post View to modify the thickness display, and you can use Identify Results to probe thickness values at nodes and write thickness information to a spreadsheet or comma-separated-value file.

Figure 2. Thickness values are displayed as element-nodal scalar results.

 

1.2 Hedgehog display

In a hedgehog display, Simcenter 3D uses both colors and the relative length of lines (drawn at the centroid of each element) to indicate the variance in thickness values across the mesh. This type of thickness display is temporary and is cleared when you refresh your graphics window.

 

To create a hedgehog display, in the sim navigator right click on a Mesh and select Thickness Information.

Figure 3. Thickness Information commands.

 

Figure 4. A hedgehog display of 2D element thickness.

 

1.3 Display 2D Element Thickness
The graphics can display the 2D elements such that they appear to have a thickness, like solid elements. Offsets are shown as well. To create such a display, go to Home tab, in the Utilities group click on More and then select Mesh Display Preferences.  In the 2D Mesh Display window, check the Element Thickness and Offset.

Figure 5. Mesh Display Preferences.

 

Figure 6. Element Thickness and Offset.

 

Figure 7. 2D elements are shown with their assigned thickness.

 

2. Create a field from an element thickness display
To create a spatial field of thickness from your fem’s 2D elements, in the sim navigator right click on the Mesh and select Thickness Information.

Figure 8. Thickness Information.

 

Then in the Thickness Information window click on Create Thickness Field.

Figure 9. Create Thickness Field

 

As a result, a new spatial field of the 2D element thickness is created under the Fields in the sim navigator.

Figure 10. A field representing the 2D element thickness

 

Maya Simulation: T +1.514.369.5706 | info@mayahtt.com | http://www.mayasimulation.com

Comments
Solution Partner Experimenter Solution Partner Experimenter
Solution Partner Experimenter

Hello community,

Someone knows how to manually edit the thickness and nodal eccentricity of cshell elements.

I want to simulate wear by erosion or corrosion in pressure vessel. I'm interested in overwriting the automatic application of thickness by a manual definition, so I would like to keep the top surface continuous and apply nodal eccentricity in the botton surface  in order to represent internal wear and evaluate shell stresses and bending stresses and  estimate the amplification factor by wear effect.

 

For example:
Node i 102 thickness 6.01 eccentricity -0.34.

To import or read an .exel, .dat or .txt

Someone knows how I can do it.

 

Thanks in advance