Week 7-Long Piston With Cam

Long piston with Cam 

Objective: 

To perform a transient analysis on a piston and a cam mechanism I need to run analysis with frictionless contact, frictional contact with frictional coefficient of 0.1,0.2 for the following cases. 

Procedure: 

Importing the given geometry and assigning material for the geometry. now we need to give connections between the cam and the barrel as well as cam to shaft, the contact is kept as frictionless.

 

now we need to give a revolute joint for the camshaft and a transitional joint for the cam follower. 

now we need to generate a mesh with element size of 3mm using face sizing option. 

In analysis setting the number of steps is off 8, and we need to turn on the large deflection. now we need to add a joint load of rotation type. 

Frictionless: 

Directional deformation 

Equivalent stress 

Equivalent strain 

Velocity 

Frictional coefficient of 0.1: 

Directional deformation 

Equivalent stress 

Equivalent strain 

Velocity

Frictional coefficient of 0.2: 

Directional deformation 

Equivalent stress 

Equivalent strain

 

Velocity

parameters	frictionless	Fc of 0.1	Fc of 0.2
	Max	Max	Max
equivalent stress	386.85	489.63	714.05
equivalent strain	0.0019445	0.0025857	0.0036908
directional deformation	10.421	10.471	10.536

 Conclusion: 

From the above table we can see that the equivalent stress, strain add directional deformation increases in frictional coefficient. the total deformation remains constant at for all three cases.