Week 7-Long Piston With Cam

Aim: To perform a transient analysis on a piston and cam mechanism model with

• Frictionless contact
• Fractional contact with a coefficient of friction as 0.1
• Frictional contact with a coefficient of friction as 0.2 

Software used:

                         Ansys Workbench 2020 R2 

Procedure:

• To simulate this challenge we are using 'Transient structural'.  Add the 'Transient structural' to the interface.
• Then load the model into geometry and then open the mechanical model to set up the simulation.    
• First, keep stiffness behaviour of barrel cam and barrel as 'Rigid body'.

• For case -1: Define the contacts as frictionless.

• For case - 2: Define the contacts as frictional with a coefficient of friction of 0.1.

• For case - 3: Define the contacts as frictional with a coefficient of friction of 0.2.
• Then add apply the 'Body-Ground - Revolute joint', Body-ground - fixed joint and Body-Body Translation joint to the Barrel cam, Barrel and Shaft respectively.

• Then generate the mesh at the contact position of the shaft and barrel cam by applying the face sizing - element size as 3 mm.

• Next, in the analysis settings, will run this model in 9 steps.

• Then apply the revolute joint to the barrel cam.

• To Calculate the Directional deformation, Equivalent elastic stress and Equivalent elastic strain, run the simulation.

Results:

Case -1:

• Directional Deformation

• Equivalent Stress 

• Equivalent Elastic strain

Case -2: 

•  Directional Deformation

• Equivalent Stress 

• Equivalent Elastic strain

Case -3:

• Directional Deformation

• Equivalent  Stress 

• Equivalent Elastic strain

Conclusion:

• Here we can observe that the results for Frictionless and with a coefficient of friction of 0.2 have the same results.