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

OBJECTIVE: Check the material properties of the rail component and calculate the speed of sound in steel rail=_______
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.
3.Time for sound to travel length of rail=______
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.
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.

SOFTWARE USED: Altair -Radioss/optistruct.
ABOUT SOFTWARE: Radioss is a solver for explicit analysis. with the help of this solver we can solve real time problems like drop test, crash test etc.

1.CHECK THE MATERIAL PROPERTIES OF THE RAIL COMPONENT AND CALCULATE THE SPEED OF SOUND IN STEEL RAIL
We have to open the hypermesh and we put user profile as a Radioss/ optistruct.
after selecting the user profile we have to open the solver deck -FIRST_RUN_0000.rad.

MODULUS OF ELASTICITY(E) - 210000
DENSITY(ρ) -0.0078
Nu- 0.29.
TO CALCULATE THE SPEED OF SOUND IN RAIL
SPEED OF SOUND IN THE MATERIAL (C)= √(E/ρ)
SPEED OF SOUND = √(E/ρ)= √(210000/0.0078)=5188.745m/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.

LENGTH OF THE RAIL = 1000
SPEED OF THE RAIL = DISTANCE/TIME
3.TIME TAKEN BY THE SHOCK WAVE =1000/5188.745 =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)

LENGTH OF THE RAIL = 1000
SPEED OF THE RAIL = DISTANCE/TIME
3.TIME TAKEN BY THE SHOCK WAVE =1000/5188.745 =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)
frequency = time/no of revolutions = 0.1927/20= 0.009636.
6.Change /print -10

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.

This is the hexa meshimg of a component. the mesh size is 10mm and i used the options of 2d drag, 3d line drag, solid map of general.
LEARNING OUTCOMES:
What is the formulae for speed of sound wave
how to open and edit engine file
how to edit animation and print cards
how to perform hexa mesh
how to perform tetra mesh
how to use linear drag
how to assign the quality parameters to the mesh.