Assignment 2-RADIOSS Engine File Editing & 3D Meshing Challenge
Report:
Aim: Answer the questions and create 3d meshing tetra mesh and hex mesh for 2 models.
Procedure:
import rad file:
1. Check the material properties of the rail component and calculate the speed of sound in steel rail=_______
'Speed of sound', C= √E/ρ
for steel, E= 210000.0 MPa
ρ= 0.0078 g/mm^3
∴ C= √210000/0.0078
∴ C= 5188.75 m/s
speed of sound in still rail is 5188.75 m/s
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.
Speed = Distance/Time
∴ 5188.75= 1000/ T
∴ T= 0.1927ms
3. Time for sound to travel length of rail=0.1927ms.
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)
6.Change /print -10.
open 0001.rad file in text:
before change:
After change:
7.3d meshing tetra mesh and hex mesh
- Repeat class examples and, maintain the quality.
- Target tet size=5mm,hex size=10mm,tet collapse=0.15.
case1: housing
import geometry
go to 2D>automesh> element size >5 >type >tria >mesh
select the 3D> tetra mesh option
check quality, fix element tet collapse<0.15
do the same for another part
final mesh
case 2: arm bracket
import geometry
mesh base surface
drag 5 layers
select elements and spin -90 based on x-axis
use 3d-linear solid
create 2d mesh
use solid map-general
final mesh
Conclusion:
All the questions are answers, 3d mesh are created on given 2 cases.