Week 4-1D Element Creation Challenge

Objective: To mesh the Parallel bracket component with the size of 5 units and also create 1D elements on the component with the below-mentioned cross-section and degrees of freedom.

a. Rod element: Translational DOF should be Constrained with RBE2 link

Cross-Section: BOX

Dimension a= 12 mm, b= 10 mm

Thickness t= 0.75 mm

b. Beam element: All DOF should be constrained with RBE3 link

Cross-Section: I Section

Dimension a= 8 mm, b= 10 mm, c= 8.5 mm

Thickness t1= 0.75 mm, t2= 0.6 mm, t3= 0.6 mm

c. Bar element: Constrain only x and y DOFs With RBE3 link

Cross-section: X section

Dimension DIM1= 5 mm, DIM3= 10 mm

Thickness DIM2= 1.2 mm, DIM4= 1.2mm

d. & e. Apply the mass of magnitude 10 with the RBE2 link

f. Join the two components with Spring elements

CAD model:

Procedure:

• Import the geometry into the workspace using the "Import Geometry" option from the toolbar.
• Select "Geometry" from the main menu page and choose the "mid surface" option.
• Extract the mid surface by auto midsurface>auto extraction>surfs>extract.
• Hide the parent geometry and leave the extracted mid surface in the workspace.
• For all the holes in the geometry, make a washer split by using the "washer split" command in the "quick edit" options.
• 
• Select 2D from the main menu page and proceed with the "auto mesh" option to mesh the surface with 5 units.
• Change the number of nodes so as to obtain a proper mesh flow and also to reduce the number of tria elements.
• Now assign a material card and a property card to these brackets and give a thickness of 5mm.
• Using 2D detailed element representation, the meshed model can be seen with a thickness.
• Switch to 1D on the main menu page and choose the rigid option to make an RBE2 link and the RBE3 option for RBE3 links.
• The spring option is used for creating a spring connection[CELAS1].
• Masses option is used to assign mass at the specified nodes.
• Connections are made as per given DOF's and the type of link[CROD, CBEAM, CBAR] at specified locations.
• Select Hyperbeam>Standard section>section type>create and create the specified shapes.
• Create a property card for each of these sections separately.
• Switch to 1D detailed element representation to view the created sections.

Final Model:

Gdrive link: https://drive.google.com/file/d/1kaR-0befIWaovnW1KPacwm_r9jNdKnIn/view?usp=sharing