Week 4-1D Element Creation Challenge

1D Element Creation Challenge

AIM:

• To Deploy the 1D element connection in the given model using Hyperworks pre-processor

OBJECTIVE:

• Mesh the Given component with the Size of 5 Units. Create 1D elements on the following component with given cross-section and DOF.

PROCEDURE:

IMPORTING THE MODEL

• The given model is in IGES file format
• To open it, Go to --> Import file --> Import geometry --> file session window --> Choose file --> Import
• The file is imported to the Graphical window.

figure - Given model

EXTRACTING THE MID SURFACE

• We can extract the mid surface using (Main menu --> Geometry page --> mid surface --> auto midsurface --> skin offset)

figure - Mid surface using auto midsurface option

figure - Extracted mid.surface

• Mid is the neutral pahse which is been generated from the CAD which is imported or given to us.
• The conversion of 3D cad to 2D cad is happening in mid surface generation.
• The mid surface is generated to reduce the complexity as by simplifying the cad model we get more accurate simulation results in shorter time.

ASSING PROPERTY TO THE COMPONENTS

• We can create new components in the MODEL TAB
• (Tab area --> Click on white space --> create -->Components/Parts)
• The below pictures shows that we can chose from there what ever we want to create in new and assign them with components.

figure - New property creation

WASHER CREATION AROUND THE HOLES

• Creating the washer area is useful to capture the proper mesh flow near the hole areas.
• Go to --> main menu --> geom page --> quick edit --> washer split
• In this model I setup the offset value as 5mm, because of target element for meshing also 5mm

figure - washer split

MESHING

• Meshing can be done using (main menu --> 2d page --> automesh)
• Setup the given target element size as 5mm, click on Mesh

figure - Meshed component

DEPLOYING NECESSORY CONNECTIONS

• Here in this model RBE2 and RBE3 link types used to make connections

figure - RBE2 & RBE3 cluster

• RBE2 - The given load/force will equally distributed to the other nodes, this is a strong Rigid connection
• RBE3 - The given load/force will not be equally distributed to the other nodes. It will be reduced by distance and type of material used.

VARIOUS CONNECTIONS

• We can make connection using (main menu --> 1D page --> bars/rods/rigids/masses/springs/rbe3)
• These connection are shown below.

• MASS and SPRING connection has delployed in the necessary areas as by requirments.

CROSS SECTION WITH PROPER DOF GIVEN DATA

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

Cross-Section: BOX- Dimension a= 12 mm

dimension 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

Dimension b= 10 mm

Dimension c= 8.5 mm

Thickness t1= 0.75 mm

Thickness t2= .6 mm

Thickness t3= .6 mm

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

Cross-section: X section- Dimension DIM1= 5 mm

Thickness DIM2= 1.2 mm

Dimension DIM3= 10 mm

Thickness DIM4= 1.2mm

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

f. Join the two components with Spring elements

• CBAR, CBEAM, CROD connection has been deployed as per the requirments

HYPER BEAM VIEW ENTITIES CREATION

• We can easily create cross section elements by using (Go to --> Hyper beam tap --> click on white area --> create --> standard section/generic section --> optistruct/hypermesh --> click anything we want)
• Here we created Box section, I-section, Cross section.

figure - Box section

figure - I section

figure - X section

FINAL RESULT:

figure - 2D Detailed element representation of all the Cross sections assingned as property