Week 4-1D Element Creation Challenge

AIM : TO CREATE 1D ELEMENT ON THE GIVEN COMPONENT WITH GIVEN CROSS-SECTION AND DOF USING HYPERMESH.

SPECIFICATION:

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

PROCEDURE:

IMPORT THE GEOMETRY :

Import the geometry into workspace and make it shaded .

Using midsurface command in the geometry module the mid surface for the model is created .The command is "Geometry-midsurfaace-auto midsurface-extraction option-offset-autoextraction-surfs-displayed-create.

Thus the mid surface for both the upper and lower bracket is created. The washer split command is used to assign washer split for the 8 holes in the mid surface

After mid surfacing the model is meshed using the automesh command in 2d module is used to mesh the surface with 5mm element size.

To mesh the given component , we need to create a washer splits the hole region for a smooth mesh.Washer split offset we selected is 5mm.

Generate the mesh with the element size as 5mm with the mixed element type.

Create material :

We select steel as material for this component.

Creating the properties :

We created the properties for the respective component also crteating rod,beam, bar and mass properties with assigning that card ID and material.

SI. NO.	Property name	card ID
1	Bracket_1	PSHELL
2	Bracket_2	PSHELL
3	Bar	PBAR
4	Beam	PBEAM
5	Rod	PROD

Creation of 1D ELEMENTS

To create a 1D elements we need to go the hyper beam tools and select the respective cross-section for creating the 1d elements.

Creation of rigid at point a,b,c,d

Create the RBE2 AND RBE3 at respective holes with the given DOF .

Creating the 1D elements on the rigid 

• Creating the rod,bar,bem 1D elements at the respective node points.
• Update the 1d elements with respect to theit properties.
• create the mass at node and spring between 2 brackets.

Result:

• The model has been imported & mid surface is taken for the given components & material properties has been assigned.
• we have meshed the component & holes has been connected with the RBE2 AND RBE3 elements then we created CROD,CBEAM,CBAR 1D ELEMENTS
• Created cross section for rod,bem,bar, properties crad has been assigned for PROD,RBEAM,PBAR.
• The mass has been applied with the magnitude of 10 on RBE2& SPRING ELEMENTS RE JOINED.