Week 7-Long Piston With Cam
OBJECTIVE:
- To set up a Piston and Cam mechanism model in Transient Analysis with different case setup and comparing the results
Steps:
Import Geometry:-
- Import the geometry from the saved location
- Open the Geometry in space claim and check for any abnormalties in the model
- In this set up we will be using the default material for all three cases
Mechanical workbench:-
- Rename the geometry according to the convinience
- Assign Barrel and Barrel Cam stiffness behaviour as Rigid
Define Contacts:-
- For case 1 Establish the connection as frictionless
- For case 2 Establish the connection as frictional with 0.1 as frictonal co-efficient
- For case 3 Establish the connection as frictional with 0.2 as frictonal co-efficient
Define Joints:-
- Fixed Body to ground joint for Barrel
- Revolute Body to ground for face of Barrel Cam
- Translation body to body load, Mobile= Cam; Refrence=Barrel
Meshing:-
- Create a default mesh for all the parts
- Create face sizing for faces which are in contact with element size as 3mm
Analysis Settings:-
- Create a analysis setting with 12 steps
- Information for 1st step is shown in below image
- Information from 2nd to 12th step is shown in below image
Define Load:-
- Define the revolute load with magnitude aa tabular data as shown below
RESULTS and CONCLUSION:
Case 1:-
- Directional Deformation
- Equivalent Stress
- Equivalent Strain
Case 2:-
- Directional Deformation
- Equivalent Stress
- Equivalent Strain
Case 3:-
- Directional Deformation
- Equivalent Stress
- Equivalent Strain
-
Case Equivalent Stress(Mpa) Equivalent Strain(mm/mm) Deformation(mm) 1 1133.3 0.0056974 12.556 2 1224.7 0.0063521 12.584 3 1493 0.0077162 12.619 - From the above results we can see the results, that Max stress should occur wherever the friction co efficient is high
- Keeping this in mind we can see the case 3 is having higher stress, so the recieved output is correct
- Defromation is same in all the cases, the diffrences are negligible
- Strain is alos more in Case 3