Assignment 2-RADIOSS Engine File Editing & 3D Meshing Challenge

1. Check the material properties of the rail component and calculate the speed of sound in steel rail=_______?

Ans :- Speed of the sound wave  C =root(E/density ) = root((210000)/(0.0078)) = 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.

Ans = Time step =l/C = (1000/5188.745) = 0.19273ms

3.Time for sound to travel length of rail=______

Ans : Dt = l/C = 1000/5188.745 = 0.19273 .

4.Edit the engine file so that the stress wave can be monitored, moving from one end of the rail to the other during impact -this will require a termination time equal to the time it takes for the sound to travel the length of the rail(set on/RUN card)

5.Set the frequency of animation output to a time that will give 20 animation steps(/ANIM/DT)

Ans =0.009636

6.Change /print -10.

 

7. 3d meshing tetra mesh and hex mesh of given Model .

 

Model 1 :- 

Aim:- Mesh the given component in  tetra mesh.

Step 1 :-Import the model

File -open -select the model - open.

 

Step 2 :- Checking for free edges and assigning Quality criteria .

Step 3 :- Generating 2D Mesh.

2D - Automesh -Surface -select the surfaces -element size 5 -element type -trias - mesh.

 

Step 4 :- Generating Tetra Mesh.

3D -Tetra Mesh - tetra mesh parameters -give tet collapes -minum elenent size - tetra mesh -select the elements - mesh.

 

Step 5 :- Cleared all Tet collapse.

tool - Check elements -3D -Tet collapse =0.15

 

Step 6 :- Ttera meshing the quick tetra mesh .

View -browsers-hypermesh -utility -geometry mesh -quick teramesh -select the component - give element size and elemenet type -mesh.

 

 

Step 7 :Passes tet collapse.

tool - Check elements -3D -Tet collapse =0.15

Final Model.

 Result :- Given compoents is meshed with tetra mesh with give quality parameters.

 

Model 2 :-

Aim :- Generating Hexa mesh.

Step 1 :-Import the model.

file -open -select the model-open.

 

Step 2 :- Generating 2d Mesh.

2D -automesh -select the surface - element size 10 -element type mixed - mesh.

 

Step 3 :- Element offset 

3D -element offset - select the elements  - select the surface to offset - give number of layers -give thickness offset.

Solid mesh created

Step 4 :- Creating solid in curve.

created center node .

Geometry -distance -select two nodes on the curve -create a center nodes.

Creating solid elements .

3D -spin -spin elements  - select the element -select the axis -select the base node as center node- angle =90degree - give on spin -spin +

 

Step 5 :- Create a linear solid .

create an edges 

tool -edges -select the element s -edges .

Generate a mesh linear as the solid mesh.

3D -linear solid -select the elemensy on edges -select the elements which is newwly created -give alignments nodes and same as edges and new created mesh - give density -create solids .

 

Step 6 :-Create a solid map.

Create a mesh on the base .

3D - Solid map-general - source dest geometry -none -dest geom-select the opposite base surface - elements drag -select themeshed elements - along geometry -select the lines - Mesh 

 

Final Model.

Result :- Given compoents is meshed with Hexa mesh with give quality parameters.

Learning Outcomes .

*Learned about whats are the parameters in radioss file.

*Learned about how to calculate the values.

*Learned about how to edit engine files.

*Learned about the generate tetramesh and hexa mesh.

Thanks 

Renith Balachandran M