Week 4-1D Element Creation Challenge using HYPERMESH

AIM:

To Mesh the Given component with the Size of 5 Units & to Create 1D elements on the following component with given cross-section and DOF.

GIVEN DATA:

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

Figure 1. Given data

THEORY:

PROJECT METHODOLOGY:

1. MID SURFACE:

• Auto mid surface has been used to extract the midsurface for this simple bracket.
• Components has been created and assigned to the particular mid surfaces.

Figure 2. Mid surface

2. ASSIGN MATERIAL:

• Create material.
• Here I have created a material and assigned to steel.

Figure 3. Component & materials assigned

3. ASSIGN PROPERTY:

• Create property
• Enter Thickness value & element type.
• Also assign this created property to the particular component & material.

Figure 4. Property assigned

4. WASHER SPLIT:

• Washer spilt is used to capture the mesh near the holes properly.
• The washer split offset value is given to 5 units in this project.

Figure 5. Washer split

5. 2D MESH:

• For this project auto mesh is been performed for the element target length of 5 units.

Figure 6. Shell mesh

6. 1D ELEMENTS:

• Some 1D elements used in this projects are,
  • PBAR
  • PROD
  • PBEAM
  • RBE2
  • RBE3
• As per the given details I have deployed the 1D elements.
• To deploy bar, rod, beam elements hyperbeam has been used.
• Where hyperbeam is used to create a cross sections.

HYPERBEAM:

From the given data a. rod element, b. beam element, c. bar element we will be creating a cross sections using hyper beam.

a. Rod element - (cross section - box):

• The given cross section details for rod elements are,

  • Cross-Section: BOX

  • Dimension a= 12 mm, b=10 mm

  • Thickness t= 0.75 mm

• To create this cross section Go to --> 1D --> Hyperbeam --> Create --> standard section ---> Hypermesh --> Thin walled box.
• The standard cross section shape will be created and enter the given dimensions data as shown in the below figure.

Figure 7. Box - cross section (Rod) - HYPER BEAM

b. BEAM ELEMENT - (I-Section):

• The given cross section details for beam elements are,
  • Cross-Section: I Section
  • Dimension: a= 8 mm, b= 10 mm, c= 8.5 mm
  • Thickness : t1= 0.75 mm, t2= .6 m, t3= .6 mm

• To create this cross section Go to --> 1D --> Hyperbeam --> Create --> standard section ---> Hypermesh --> I - section
• The standard cross section shape will be created and enter the given dimensions data as shown in the below figure.

Figure 8. I-Section (Beam) - HYPER BEAM

c. BAR ELEMENT (X -SECTION):

• The given cross section details for beam elements are,
  • Cross-section: X section
  • Dimension DIM1= 5 mm
  • Thickness DIM2= 1.2 mm
  • Dimension DIM3= 10 mm
  • Thickness DIM4= 1.2mm
• To create this cross section Go to --> 1D --> Hyperbeam --> Create --> standard section ---> Optistruct --> CROSS
• The standard cross section shape will be created and enter the given dimensions data as shown in the below figure.

Figure 9. X-SECTION (Bar) - HYPERBEAM

Hence, the cross section has been created for bar, rod, beam element as per given data. Now these cross sections should be assigned to the particular property.

APPROACH:

a. Approach for Rod element:

• Created RBE2 cluster element for hole (a) by constraining translational as per input data.
• Created CROD element by connecting hole (a).
• CROD - Thin walled cross section as per input.

Figure 10. Approach a.

b. Approach for beam element:

• Created RBE3 cluster element for hole (b) by constraining all dof as per input data.
• Created CBEAM element by connecting hole (b).
• CBeam - I-cross section as per input.

Figure 11. Approach b.

c. Approach for BAR element:

• Created RBE3 cluster element for hole (c) by constraining only X & Y dof as per input data.
• Created CBAR element by connecting hole (b).
• CBAR - X -section as per input.

Figure 12. Approach c.

d. & e. Apply the mass of magnitude 10 with the RBE2 link:

• Created RBE2 cluster element for hole (d & e) as per input data.
• Applied a mass of magnitude 10.
• Cmass

Figure 13. Approach d & e

f. Join the two components with Spring elements

• Spring elements are created at the four corners of the brackets to join the component.
• CElas

Figure 14. Approach f

Finally, Select 1D detailed element representation to view the cross section of bar,rod, beam element & Select 2D detailed element representation to view the thickness of the mid surface.

CONCLUSION:

The mesh & creation of 1D element has been successfully achieved as per the given inputs.

Figure 15. Final view

LEARNING OUTCOMES:

From this challenge, I can able create a 1D element as per the given inputs.