Week 4-1D Element Creation Challenge
AIM: To obtained a midsurface of of given component and create a required 1D elements on it.
PROCEDURE:
- First we will import the .IGS file in the hyper mesh.
- The component is shown below:
- Now first we will do the dimensioning to the model.
- GEOM>DIMENSIONING
- Now we need to extract the midsurface from it.
- For that go to the GEOM>MIDSURFACE
- After that select the surface and then click on extract,
- Now for the second component we will use the different method for that go to the GEOM>MIDSURFACE>EXTRACTION OPTION>OFFSET+PLANES
- As you can here the the fillet part is slightly different in both parts.
- The midsurface part is shown below:
- Now to create a 1D element we required meshing on the plates.
- For that go to GEOM>AUTOMESH and select the surface for meshing and then select MESH
- Before meshing we will create a washer on the hole for that go to the GEOM>QUICKEDIT>WAHSER SPLIT
- Now meshing.
- Now we will create the 1D element with the help of given dimension.
- For that go to 1D>RIGIDS for RBE2 elements.
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
- So the rigid is form with TRANSLATION DOF constrained.
- Now t create a ROD go to 1D>HYPERBEAM and select THINWALLED assign the property given above.
- Now go to 1D>RODS and select the center nodes for the RIGID ELEMENTS
- Now to assign the property to the created rod first create a property with CARD IMAGE: ROD and BEAM SECTION as the ROD we created using HyperBeam
- And then assign this property to the the COMPONENT
- Now next is Beam element
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
- For RBE3 link go to 1D>RBE3
- Now for beam element go to 1D>BARS and select element type as CBEAM
- Now create a HyperBeam With a HyperMesh>I section
- Now assign the property to BEAM for I section.
- Now next is BAR ELEMENT
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
- Now for bar element go to 1D>BARS and select element type as CBAR
- Now creating X section for th beam. For that go to HyperBeam. for this time go to OPTISTRUCT>CROSS
- Now assign the property to BAR for X section.
- Now we have to apply a MASS On RBE2 link.
- For that go to the GEOM>MASSES
- Now we have to Join the two components with Spring elements
- For that first we will create a two rigids at end of the component and then join them with the help of spring
- For spring element go to 1D>SPRINGS
- Now to see the all the created elements go to 1D detailed element Representation.
LEARNING OUTCOMES:
- Able to construct the RBE2 and RBE3 elements.
- Able to apply properties to the component.
- Able to create diffrent types of Cross-Section with the help of HyperBeam.
CONCLUSION:
- All the 1D elements are created.
- Properties are assigned to the 1D elements.
- Spring are used to join the two components.