Week 4-1D Element Creation Challenge

AIM:-

1) To take the Mid-surface for the given Component.

2) To mesh the Mid-surface Components.

3) To create 1D elements with the given cross-sections and Dof.

a) Rod-elements:-

with only Translational DOF and RBE2 link.

Cross-section:- Box- Dimension a = 12mm

Dimension b = 10mm

Thickness t = 0.75 mm

b) Beam-Elements :-

with all DOF and RBE3 link.

Cross-section :- I-Section -

Dimension a = 8mm

Dimension b = 10mm

Dimension c = 8.5mm

Thickness t1 = 0.75mm

Thickness t2 = 0.6mm

Thickness t3 = 0.6mm

c) Bar-Elements :-

with only x and y Dofs with RBE3 link.

Cross-section :- CROSS section

Dimension DIM 1 = 5mm

Thickness DIM 2 = 1.2mm

Dimension DIM 3 = 10mm

Thickness DIM 4 = 1.2mm

d and e. apply the mass of magnitude 10 with RBE2 link.

f.Join the two components with spring elements.

Procedure :-

1) we Import the model using the Import option we can see that the component is a double sided bracket as shown in the Image given below.

Fig 1.Given Geometry

2) we then measure the thickness of the component using the Distance option and take the mid-surface using the mid-surface option in the geometry module as shown in the Image given below.

Fig 2. After taking Mid-surface using Mid-surface option.

3) We assign material and Properties to the mid-surface component using the create option by right clicking on the model browser as shown in the images given below.

Fig 3.Assigning Steel ( Material) to the component.

Fig 4.Property ( Bracket 1 )

Fig 5. Property ( Bracket 2)

4) We then create the washer splits for the holes in the Component and then we proceed to mesh the component using the automesh option in the 2-D module.Finally,we get the good mesh flow in the component as shown in the image given below.

Fig 6. After Meshing the Component

5) We then Proceed to create the 1-D elements i.e. RBE2,RBE3,CBAR,CBEAM,CMASS and CROD. For that,First we create RBE2 Elements using the rigids present in the 1-D module for the first set of holes top and bottom and we also restrict the element to translational DOF in X,Y and Z axis as shown in the image given below.

Fig 7.RBE2 element is created using rigids option

6)we then,create RBE3 Elements using the RBE3 option in the 1D module for the second set of holes top and bottom and we also restrict the element to all DOF in x,y and z axis as shown in the Image given below.

Fig 8. RBE3 elements are created using RBE3 option for second set of holes.

7) we then,again create RBE3 elements using the RBE3 option in the 1D module for the third set of holes top and bottom and we also restrict the element to translation and rotation DOF in x and y axes is shown in the Image given below.

Fig 9.RBE3 elements are created using RBE3 option for the third set of holes.

8) We Proceed to give RBE2 Elements on the holes on the either of sides of the bracket both in top and bottom components.After that we provide mass of magnitude 10 and type of mass as CMass using Masses option as shown in the Image given below.

Fig 10. After providing Mass of Magnitude 10 on either side of the Holes.

9) we then create CBAR,CBEAM and CROD with the master nodes of all the opposite holes in the 1-D module as shown in the Image given below.

Fig 11. After Creating 1-D Elements ( CROD,CBEAM,CBAR)

10) We then create cross-sections using the Hyperbeam for Rod,Beam and Bar.First,we create cross-section using the given dimensions in the aim for Rod that is a Thinwall box as shown in the Image given below.

Fig 12. After creating Cross-section For Rod element using HyperBeam

11) We then create the second Cross-section using the given dimensions in the aim for Beam that is a I Beam as shown in the Image given below.

Fig 13. After Creating Cross-section For Beam using Hyperbeam

12) we create the cross-section for Bar using the given dimensions that is a cross option in the optistruct section as shown in the Image given below.

Fig 14. After Creating Cross-section for Bar using Hyperbeam

13) After that we create Properties by right clicking on the Property tree for Rod,Beam and Bar with Property cards as PROD,PBEAM and PBAR. The properies are created as shown in the Image given below.

Fig 15.Property ( ROD-PROD)

Fig 16.Property ( BEAM - PBEAM )

Fig 17.Property ( Bar-PBAR )

14) Then,Finally we create spring elements using the springs option under the 1D module In that,we give the Type of spring as CELAS, and we constrain the Y-axis translation as shown in the Image given below.

Fig 18.After Creating Spring Elements

Fig 19.Final Component

Conclusion:-

1) we have Imported the model and we took the mid-surface of the components and we assigned material and Property to the mid-surfaced Components.

2) We have meshed the components and then we have connected the holes of the components with RBE2 and RBE3 elements.

3) we have created the CBAR,CBEAM and CROD 1D elements with their DOF constrained according to the data given in the aim.

4) we have also created cross-sections for the rod,beam and bar using the HyperBeam option and we also created material and Property cards for the rod,beam and bar i.e. PROD,PBEAM and PBAR.

5) we also have created a mass i.e. CMASS in the holes on either Having RBE2 Connections.

6) Finally, We also created CELAS type springs on Four edges of Both Components