Week 4- Challenge

AIM:

Create 1D elements on the following component with given cross-section and DOF.

1. Rod element:- with only translational DOF and RBE2 link

Cross-Section: BOX- Dimension a= 12 mm

dimension b=10 mm

Thickness t= 0.75 mm

1. Beam element:- with all DOF and 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

1. Bar element:- with only x and y DOFs With RBE3 link

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

Thickness DIM2= 1.2 mm

Dimension DIM3= 10 mm

Thickness DIM4= 1.2mm

1. & e. apply the mass of magnitude 10 with RBE2 link
2. Join the two components with Spring elements

METHODOLOGY:

METHODOLOGY TO CREATE 1D ELEMENTS ON THE COMPONENT WITH GIVEN CROSS-SECTION AND DOF.

1. IMPORT MODEL
2. GEOMETRY CLEANUP
3. DELETING SOLIDS
4. GENERATING MIDSURFACE
5. MESHING
6. CREATING ELEMENTS
7. APPLYING THE MASS
8. CREATING SPRING ELEMENTS

PROCEDURE:

Creating the elements on components involves the following procedure

1. IMPORT MODEL:

• Import the given model into hypermesh.
• Importing model may not be possible if the file format is not supported by the hypermesh.

2. GEOMETRY CLEANUP:

• After importing the model the main process is geometry cleanup.
• In some cases if the model is imported to hypermesh due to some graphical issues the geometry changes may occur, So geometric cleanup plays an important role.
• Remove all unnecessary lines from the model.
• If more geometric cleanup is required then by using autocleanup maximum geometric errors can be solved.

3.DELETING SOLIDS:

• Before generating 2D mesh for the components then the solids should be deleted.
• It can be done by using the delete tool and select solids and select all to delete all solids from the component.

4.GENERATING MIDSURFACE:

• For generating the midsurface the solids should be removed.
• Create washer splits near the holes for better mesh flow.
• For the given component,have 2 parts generate midsurface individually.
• By using the midsurface tool midsurface can be generated manually and by using auto midsurface it can be done fastly.
• By using a midsurface tool select surfaces and generate midsurface.

5.MESHING:

• Meshing for the component can be done by using the Automesh tool.
• By giving the quality criteria for the meshing and selecting the whole midsurface to generate meshing.
• Mostly by using the automesh tool the complete surface will be meshed and for proper and uniform mesh some modification should be done.
• By using 2D meshing tools mesh can be edited or can be rebuilt.

6.CREATING ELEMENTS:

• For creating the elements by the given cross section and DOF meshing should be done.
• According to the given data, using 1D tools creates RIGIDS at two surfaces at point “a”.
• Create rbe3 elements at points “b” &”c”.
• Create rbe2 elements at points “d” & “e”.
• By using HyperBeam tools from 1D construct three elements: they are rod, bar and beam with a given cross section.
• Create new properties for the following:

a.bracket 1

b.bracket 2

c.ROD

d.BEAM

e.BAR

• Assign all the metal for the bracket1 and 2.
• And also assign all the hyper beam elements for the rigids at the desired positions.
• For viewing the 1D elements completely use tool 1D Detailed Element Representation.
• By using the tool mentioned above the 1D elements can be seen with their complete cross section.

7.APPLYING THE MASS:

• For knowing any result masses must be applied on the component.
• Here in this component according to the given data the mass should apply on point “d” & ”e”.
• For applying mass at the given point use masses tool from 1D.
• Apply the mass with the given magnitude.

8.CREATING SPRING ELEMENTS:

• The spring elements should create at the corners of the components.
• By using the spring element join the two components at the four corners.
• By using springs tool under 1D, the springs can be created.
• The complete model is done with the required cross section and DOF.

LEARNING OUTCOMES:

• Creating the new components by using the Geometry tools.
• Geometry cleanup.
• Generating mesh by using 2D mesh tools.
• Creating the 1D elements with required conditions
• Assigning the properties for the HYPER BEAMS.

RESULT:

Created 1D elements on the following component with given cross-section and DOF successfully.