Week 4-1D Element Creation Challenge

Element Creation Challenge-

AIM-

To mesh the Given component with the Size of 5 Units and create 1D elements on the following component with given cross-section and DOF.

OBJECTIVE-

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: cross(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  

PROCEDURE-

• Import the model. Go to File >> Import-Geometry >> (Select file) >> Import

• Mid-Surface Generation

Mid Surface is just created because the 3D model has uniform thickness all over the part. So to make the analysis faster the part is converted to a 2D meshed part.

Click on Geometry>midsurface>auto midsurface(choose skin offset in extraction options)

Now that the mid-surface is created, we can delete the solid surfaces using Delete option by Tool>Delete>solid>select solids>delete entity.

• Creating Material(Steel)
• Creating Property

The Parallel Brackets have two Parts parallelly facing each other.

Now creating two properties naming Bracket1 and Bracket2.

After creating the properties give the material(Steel) in its options.

• Creating Washer Splits.

The washer splits are created on the holes of the mid surface of 5mm by Geometry>quick edit>washer split>select the holes and specify the offset value.

• Creating the 2D mesh on the mid surfaces

• Now create the RBE2, RBE3, spring, mass links for the brackets.

RBE2- A

Select the nodes by selecting the following options

The same options apply for the bottom bracket too

RBE3- B

RBE3- C

RBE2- D&E

create the same elements for all the remaining holes too

• Creating the Cross sections

• Crearing the properties for the bar elements and assigning the 

• Creating the BAR, BEAM, ROD elements for the RBE2 and RBE3 links

ROD element- A

Beam Element- B

BAR ELEMENT- C

MASS of magnitude 10- D&E

• Creating spring elements for the nodes on the free edges.

RESULT-
Hence all the required objectives are fulfilled:
a - Rod element Created with only translational DOF and RBE2 link.
b - Beam Element Created with all DOF and RBE3 link.
c - Bar Element Created with only x & Y DOF and RBE3 link.
d & e - Mass added on the Master node of RBE2 link.
f - Two Components were joined with Spring Elements.