Week 4- Challenge

AIM

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

OBJECTIVE

Mesh the component and create the 1D element for the following component:

Rod element with only translational DOF and RBE2 link with:

Cross section: BOX dimension a = 12mm, dimension b = 10mm, Thickness t = 0.75mm

Beam element with all DOF and RBE3 link with:

Cross ssection: I – Dimension A = 8mm, Dimenison B = 10mm, Dimension C = 8.5mm, Thickness t1 = 0.75mm, thickness t2 = 0.6mm, thickness t3 = 0.6mm

Bar element with x and y DOFS and RBE3 link with:

Cross section – Cross dimension Dim1 = 5mm, dimension Dim2 = 1.2mm, Dimension Dim3 = 10mm, Dimension Dim4 = 1.2mm

Apply the mass of magnitude 10 with rbe2 link

Join the two components with Spring elements

PROCEDURE

• Import the given IGES model file from import option.

• After importing extract, the mid- surface from geometry tab -> mid surface portion for both the brackets separately.

• Mention the component names for brackets an delete the solid part of bracket.
• Create washer split around trimmed areas
• Assign the property for this as given:
• Create the material property card and assign the material as steel to it
• Also assign thickness of 2.0mm for both the brackets
• Mesh the given brackets as mentioned:
• From 2D option on toolbar, select auto mesh and mention the element size as 10mm

• Then create 1D elements for the following:
• Various RBE2 and RBE3 links are created as mentioned in objective.

A) ROD ELEMENT RBE2

Select 1D option from toolbar

• Then select rigid option form there
• Uncheck the DOF 4 5 and 6
• Select node by path
• Select all the nodes and click create.

B) BEAM ELEMENT

• Select 1D option from toolbar
• Then select RBE3 from there
• Check all the DOF
• Select nodes by path
• Select all nodes and click create as mentioned above

C) BAR ELEMENT

• Select 1D option from tool bar
• Then select RBE3 from there
• Uncheck DOF 3 and DOF 6
• Select node by path as other two and select all nodes and click create as mentioned in above

Create elements from 1D

• Click on hyper beam
• From the generic section create hyper mesh and select Box
• We need to input values for the box as mentioned in the question

• Again, select hyper beam from toolbar
• Go to generic section
• Click on create and select hyper mesh
• Then select I section from there and input the values as given

• For third time again go to hyper beam from toolbar
• Go to generic section
• Click on create and select Opti struct
• Click on cross and input the values as given.

Select Model view option from Toolbar to create following components

To create rod

• Click on 1D option from toolbar
• Select nodes
• Create and update it as CROD

To create beam

• Click on bar in 1D from tool bar
• Select element type as CBEAM
• Select the nodes
• Select the cross-section and apply it

To create bar

• Click on bar in 1D option from toolbar
• Select nodes
• Select the cross-section and apply it as above mentioned in beam

Create properties for ROD, BEAM, AND BAR

• In rod properties change cards image as PROD and mention it in the section
• In beam property change the card image as PBEAM and mention it in the section.
• In bar property change the card image as PBAR and mention it in the section.

To update the properties of ROD

• Click on bar on 1D
• Then select element type and properties
• Click on update

To update the properties of beam

• Click on bar in 1D option from toolbar
• Select element type as CBEAM
• Then click on update

To update the property of bar

• Select again on bar in 1D option from tool bar
• Select the elements and property
• Click on update

To view the model after updated the properties:

• Click on 1D detailed element representation which is on the tool bar.

To apply the mass of magnitude 10 with RBE2 link in D & E

• Click on rigid in 1D
• Set as multiple nodes and calculate node
• Check all DOF as select the two sides nodes
• Click on create

Create new component and add property for Mass creation

• On property select material as steel
• In components update the property

To create the mass

• Click on 1D option from toolbar
• Click on masses from there
• Then assign the value as 10 in mass (as given in the question)
• Select the property as mass
• Select element types as CMASS
• Then at last click on create

To create spring in F region

• Assign new component and property as Spring
• In Spring property
• Select material as steel
• In component select property as spring
• After that go to 1D option from tool bar
• Click on springs
• Select property
• Select as spring from there
• Select the element type as CELAS1
• Select the nodes where the spring is needed.

CONCLUSION

• Sucessfully learned to create the mid surface and auto meshing option.
• Learned to assign the various properties to the components.
• Learned the usages of 1D elements in hypermesh
• Also successfully created the 1D elements for given components as per the given dimensions and properties.