CRASH WORTHINESS ANALYSIS OF HOUSING AND ARM BRACKET USING HYPERMESH AND RADIOSS

OBJECTIVE:

The main objective of this challenge is to create 2D and 3D mesh and also perform radioss for the given radioss files

PROCEDURE:

1. Create 2D and 3D mesh for housing and arm bracket
2. Perform radioss on given radioss files

CREATE MESH FOR HOUSING:

• Import the given model using hyperworks
• Goto COMPONENTS select the hub component as it is already 2D meshed
• Press F5 and then select the hub component and click MASK and then REVERSE and make it as current
• Eliminate errors by giving quality criteria and make 2D mesh as TRIA error free by keeping the model in 2D mode
• Then goto 3D mode make the model as current
• Goto 3D -> TETRA MESH -> TETRA MESH PARAMETERS edit these parameters to meet our quality criteria and tet collapse
• Goto TETRA MESH -> select all elements that convert to 3D and click on MESH and RETURN .The 3D mesh is generated

2D MESH OF HUB

3D MESH OF HUB

• Then press F5 select housing component of hub and click MASK and then REVERSE to make as current component
• Goto 3D -> TETRAMESH -> TETRAMESH PARAMETERS -> edit the 3D mesh parameters of tet collapse as 0.15 for tetra elements
• Goto TERTAMESH -> COMPONENTS select all components and click on MESH and then RETURN .
• 3D MESH is generated and then check for tet collapse by using F10

2D MESH OF HOUSING

3D MESH OF HOUSING

COMBINED 3D OF HUB AND HOUSING

CREATE MESH FOR ARM BRACKET :

• Open the arm bracket file using hyperworks by selecting radioss block
• Click MODEL -> COMPONENTS -> make BASE as current
• Goto 2D -> Select surface on top of base by selecting elementsof quad only and size as 10mm perform 2D MESH
• Goto 3D -> ELEMENT OFFSET->SOLID LAYERS -> select all 2D elements and select the four surfaces along sides and give no.of layers as 5 and thickness as 25mm
• 3D mesh is generated along the thickness of the BASE
• Goto MODEL -> COMPONENTS -> ARM CURVE attach to it
• Click F5 keep curosr on ELEMS and select BY CONFIG and select HEXA8 ELEMS and mask
• Goto GEOMETRY -> NODES select circle and click on curve of arm curve to create a center for circle
• Goto 3D->SPIN -> SPIN ELEMS and select angle as 90 and on spin as 12 select the elements that you have to spin and select the nodes of arm curve and select base point as circle center by keeping spin axis as x-axis and click on SPIN- and RETURN
• Now make visible arm staright and MASK all SURFACES except the end surface
• Goto 2D and mesh the surface and make sure that the elements is equal to end of ARM CURVE elements
• Goto TOOL-> FACES and click find faces of arm curve
• Goto 3D LINEAR SOLID ->select from and to elements and also three nodes on that surface and click on SOLIDS and RETURN
• Goto TOOL -> FACES -> remove faces
• Select BOSS and mesh on circle part using 2D and make sure that elemnets are equal
• Click SHIFT+F7 and project node to surface on BOSS circle
• Goto 3D ->SOLID MAP -> select source geometry none and select elemnts on circle of BOSS and choose node path along the surface of BOSS and MESH and click RETURN
• Goto TOOL -> ORGANISE and slecet the mesh and move to BOSS

3D MESH OF ARM BRACKET

1. Check the material properties of the rail component and calculate the speed of sound in steel rail=5188.745mm/ms

2. The length of the rail is about 1000 mm.calculate the time takes for a shock wave to travel from one end of the rail to the other=0.192724ms

3.Time for sound to travel length of rail=0.192724ms

PERFORM RADIOSS ON GIVEN RADIOSS FILES:

• According to the calculated data given above and download the radioss files
• Open the hypermesh and click on IMPORT SOLVER DESK -> and select radioss and open the FIRST_RUN_0000 and click on IMPORT to open the radioss file
• Goto VIEW-> HYPER WORKS -> SOLVER and click ENGINE KEYWORDS -> RUN set stop time as 0.192ms and set frequency as 0.096
• Goto ANALYSIS -> RADIOSS set option as -nt 4 and click on RADIOSS it will run the file and gave 20 animation files as output

ANIMATION FILES

These are 20 animation files that we got after running those radioss files

Goto HYPERVIEW and open the h3d file to see the animation of 20 files

Goto CONTOUR to see the displacement of shock wave

DISPLACEMENT OF SCHOCK WAVE

CONCLUSION:

• Perform 2D and 3D meshing according to target element length of 5mm for tria and 10mm for quad for arm bracket and housing cover and hub
• Eliminate errors according to quality criteria by taking tet collapse as 0.15 mm for tetra elements in 3D mesh
• Importing radioss file to hypermesh is completed by editing those run time and frequency values
• Open th hd3 file which contain all animation files in HYPERVIEW and goto contour to perform animation of those files is completed

CRASH WORTHINESS ANALYSIS OF HOUSING AND ARM BRACKET USING HYPERMESH AND RADIOSS ->https://drive.google.com/open?id=188pKwb7cA_MVyP3AkdCa-JJbAqXA-V76