Week 2 Railwheel and Track

Objective: The objective of this simulation is too compare the results of different bearing loads applied to the rail wheel. loads are 1e+5N and 5e+5N. Also implement a user defined result and calculate the total deformation obtained. Compare it with the result obtained using inbuild ansys for a load of 1e+5N.

Setup: The model consists of a railwheel and track.

Material: Both the railwheel and the track are made of structural steel .

	Young's modulus	poission ratio	yield strength	ultimate tensile strenght
Structural steel	200 GPa	0.3	250MPa	460MPa

Contacts: there are 2 contact sets. One is between the railwheel and track and the other is the contact between railwheel and shaft.

(Between railwheel and track)

(Between railwheel and shaft)

Joints: Fixed joint: To fix the track along one particular plane.

2. Translational joint: Applied to the shaft which rotates and moves a certain distance, hence translational. It causes the railwheel to translate.

3. Planar joint: Applied to fix the rotation of railwheel along a single plane.

Mesh : The default size is 50mm. The regions in contact with the track have a mesh size of 35mm. The total no of elements is 17323 and 6218.

Joint displacement:

Results:

CASE 1:

1. Total deformation

a.100000N

b. 500000N

2. Equivalent Stress(Von mises)

a. 100000N

b.500000N

3. Fatigue Life

a. 100000N

b. 500000N

Conclusion: From the above results, it can be concluded that the Fatigue Life is lower in the case where the load is 500000N. The life of a product varies inversely with the load applied.

The deformation and equivalent stress is greater for a laod of 50000N.

CASE 2:

The inbuild ansys value of total deformation for a load of 100000N is 999.09N.

User defined result:

From the results above we can conclude that the values obtained by the inbuild ansys and the user defined result is the same.