Week 4- Challenge

Objective: To generate a mesh and create 1D elements such as ROD, BEAM, and BAR with specified dimensions on the given component and also apply the mass of specific magnitude on the component

Cad model image:

Procedure:

Midsurfacing & Meshing

1. Open hyper mesh and select Opti struct as the user interface
2. Import the given cad model file into the hyper mesh and open the file.
3. Click geometry and select mid surface feature
4. To obtain a good mid surface, select offset+planes/ offset option in extraction
5. Click on the surfaces and extract the mid surface by auto mid surface feature
6. Rename the mid surfaces individually and delete the solids
7. For 3D representation, thickness has to be assigned to the surface
8. Create a material by name steel and select card image as MAT1
9. Create two more properties and rename them as bracket 1& bracket 2
10. Assign 2 & 2.5 as the thickness of surfaces respectively
11. Select Pshell as card image and steel as a material in the properties
12. Now assign these properties to their respective component
13. Assign washer split at the holes on the component
14. Select the entire component and generate a mesh with element size as 8.

1D element creation:

RBE2 &RBE3 Links:

1. First RBE2 link has to be created along the holes on both surfaces at position (a)
2. click 1D in the menu bar and select rigid element
3. generate multiple nodes along the holes and assign only translational DOF
4. now by clicking create an RBE2 link will be generated
5. similarly, create RBE2 links at positions (d) and (e)
6. similarily create RBE3 links with all DOF at position (b) and with only x & y DOF at position (c)

Creating BAR, ROD, and BEAM geometries:

1. click 1D and select hyper beam, hyper beam view will be opened
2. For Rod elements create a box cross-section by with the specified dimensions by the following steps ( create – standard section – optistruct/hyper beam – box )
3. similarly, choose hyper beam instead of optistruct and create I section for beam and cross-section for the bar with specified dimensions

1. To create a rod element, click the bar and select the nodes of the link on the upper and lower surfaces
2. Select CROD as the element type and a ROD element is generated at position (a)
3. Similarly, create BEAM and BAR elements at positions (b) and (c) respectively.
4. Since the components properties are different from the properties of rod, beam, and bar, individual properties for each of them has to be created

Element type	Card image	Beam section
ROD	PROD	Rod ( Box)
BEAM	PBEAM	Beam (I section)
BAR	PBAR	Bar (cross-section )

8. All these elements have to be updated with these properties
9. In order to update, select the elements and their respective element types & properties
10. Assign a vector direction and click update
11. In order to visualize the individual cross-sections, click 1D detailed element representation
12. Now create a mass of magnitude 10 at the nodes of RBE2 link at positions (d) & (e) by selecting element type as CMASS1 and update it
13. Finally, join the two components by spring element at (f) positions by selecting DOF1 and CELAS1 as the element type and update the component

Result :

Therefore a mid surface is generated for the surfaces and a mesh is generated on the entire component. Also, 1D elements such as ROD, BEAM, and BAR are created with specified dimensions and properties. Finally, a mass of magnitude 10 is created at the specified position.

GOOGLE DRIVE LINK:

https://drive.google.com/file/d/1FvDpSRBMCAvSCIwmWMcmx1YYHD3a1Mfh/view?usp=sharing