Assignment 2

ASSIGNMENT 2

Objective of this assignment.

1. Checking the material properties of the rail component and to caluculate speed of sound in steel rail.
2. 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. Editing the engine file.
5. Set the frequency of animation output to a time that will give 20 animation steps.
6. 3d meshing tetra mesh and hex mesh for the given 2 models for given quality.

quesions

1.speed of sound in steel rail C=`√x`(E/ρ)

E=young's modulus

ρ=Density

C=`√x`(E/ρ)=√x (210000/.0078)

C=5188.745mm/s.

2.Time for sound to travel length

t=l/C=(1000/5188.745)=0.1927m-sec

Time for sound to travel length=0.1927m-sec

l=length of rail=1000mm

C=speed of sound=5188.745mm/s

3.Editing the engine file

5.frequency of animation

f=t/steps=0.1927/20=0.009635hz

6.tetra mesh

given CAD as follow,

Quality maintained for tetra mesh (Target tet size=5mm,hex size=10mm,tet collapse=0.15)

i maintained trias to model 2D in tetra mesh as shown in below

after model tetra mesh below is the images of models as follow,

and also i attached 2 model in drive for your reference

7.hex mesh

input cad as follow,

after model HEXA mesh below is the images of models as follow,

Conclusion:

Carried out all the caluculations as caluculated above and also meshed all tetra and hexa mesh as explained above and models attached to drive as follow.