1 D Element Creation In Hypermesh (Optistruct)

1D elements are used when one of the dimensions is very large compared to the other two dimensions. The shape of the 1D element is a line and the respective cross-sectional area will be assigned to the element as input data.

Navin Baskar·31 Oct 2022·3 min read

1-D Element Creation In Hypermesh (Optistruct)

Steps To Create Beam A Cross-Sectional Area

In Hypermesh, the Beam cross-sectional areas are created using the HyperBeam panel. Select 1D > HyperBeam > standard section.

Under the standard section, for the given solver profile in the standard section library, we can select the standard section type to create the desired beam section.

After selecting the section, click on create. This will take us to the Hyper Beam View. The Dimensions required for the selected cross-section are provided under the Parameter Definition table.

To return to the Hypermesh window click on the Model View icon.

The created Beam section will be available in the Beam section collector under the model browser.

Steps To Create A-Rod Element:

Create a new property and change the card image to PROD.

Select the required Beam section in the Beam section selector.

To create a Rod element go to the 1D > rods panel. And change the property to the created property with the PROD card image and Beam Section. Select elem types to CROD.

Select the two nodes between which the rod element should be created to create the Rod element.
Switch to 1 D Detailed Element Representation in the Visualisation Toolbar to get a detailed view of the created rod element.
1D Detailed Element Representation

Steps To Create Bar Elements:

Create a new property and change the card image to PBAR.
Select the required Beam section in the Beam section selector.
To create a Bar element go to the 1D > bars panel. And change the property to the created property with PBAR card image and Beam Section. Select elem types to CBAR.

Note: Bar and Beam elements (Ux, Uy, Uz, Rx, Ry, Rz) can resist vertical forces unlike the Rod elements (Ux, Ry). It is necessary to properly orient the Bar and Beam elements according to the requirements.

For selecting the Orientation vectors, click on HyperBeam View to understand the orientation of the Beam section.
In HyperBeam View, the section's Y axis as a reference beam element can be oriented in Hypermesh.
In Hypermesh, the X axis is the longest dimension so the Y axis of the beam section can be oriented along the Y axis and Z axis as shown in the below figure.
To orient the Y axis of the beam section along the Z axis in Hypermesh, click on the drop-down button and switch to the Z axis.
Select the two nodes between which the Bar element should be created to create the Bar element.
Switch to 1 D Detailed Element Representation in the Visualisation Toolbar to get a detailed view of the created Bar element.
Click on review and select the element. It can be seen that the Y axis of the beam section is oriented along the Z axis in Hypermesh.

Note: Beam elements can be created similarly by following the steps needed to create Bar elements except changing the card image in the Property card to PBEAM and the elemtypes in 1D > bars to CBEAM when creating the Beam elements.

Update

Using the update command button the information of the created 1D elements can be changed. Below are the steps to change the created Bar element to a Beam element.

Create a new property with a Card image as PBEAM and a Beam section selected.
Go to 1D > bars > update, and select the bar element that needs to be updated.
Change the Property to the newly created property and also change elem types to CBEAM.
Now click on update. Check the elem type and property to update them and click on update.
Now the 1D element will be updated as the Beam element.