Week 4-1D Element Creation Challenge

Objective: To Mesh the Given component with size of 5 and create 1D element with given cross sections and DOF.

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.

CAD Model:

 Procedure:

• Open the Hyper mesh software.first we need to import the model by selecting Import<geometry<IGES

• create mid surface by selecting geometry

• Then create midsurface for lower bracket and rename it.
• Delete solids by Selecting delete<solids<all<delete.
• Rename the midsurfaces as bracket 1 and bracket 2.and hide the surfaces.
• assign material by right click<create<material<steel<return.
• create properties for bracket1 and bracket2 .create<properties
• click on this properties and assign thickness 2 and 2.5.keep element type as shell and add material.

• Go to components and click on bracket1 and assign proprties to it.and same as for bracket2.
• 
• Go to quick edit and give washersplit of 5mm offset at all holes.
• Go to 2D<mesh<automesh
• the mesh will generated on the components.
• then create rbe2 link at a,rbe3 link at b,rbe3 link at c,rbe2 link at d&e.

• Goto Hyperbeam

• Add properties of rod,bar,beam and assign cross sections to them.

• Go to rods select nodes,and assign property of rod,element type c rod same as beam and bar element.
• Go to masess<create<nodes< give mass value 10 and property of bracket2 and element type as cmass.

• Go to springs select nodes and create spring elements.total 6 spring elements are created.

Results:

The component is meshed with 5mm size and created 1D element with rbe2,rbe3 links and the cross sections of given dimensions are defined.