Week 7-Long Piston With Cam

objective: To perform a transient analysis on a piston and cam mechanism model. you need to run the analysis with frictionless contact, frictional with 0.1 and 0.2 as the friction contact for a total of 3 cases. find out the equivalent  elastic strain and compare them for all the 3 cases 

 solution - first we add the material needed from the engineering library

material properties for structural steel

Now we upload the model to the geometry and open it in space clam and see if there are any discontinuties in the model

update the model to the mechanical module and opening the module

Now in connections we add contact between the cam and the barrel and cam and cam shaft. The contact is kept as friction less.

we add the joints to the model fixed to ground for the barrel revolute for the cam shaft and translation for the cam follower.

we generate face sizing where there is contact with a mesh element size of 3mm.

inside of the barrel is also meshed.

for analysis setting we use total 9 steps for 1st step the setting are

for step 2 to 8 

Now we add a joint load of rotation type and input the rotation degrees

after setting up the problem insert the desired result in the solution and solve

friction less

equivalent stress

equivalent strain 

directional deformation 

frictional coefficient 0.1

equivalent stress

equivalent strain 

directional deformation

 

frictional coefficient 0.2

equivalent stress

equivalent strain 

directional deformation 

conclusion: From the above we can see that as the frictional coefficient increases the equivalent stress, strain and directional deformation increases. As there is friction the energy required also increases hence the stress and strain also increases. Total deformation remains constant for all 3 cases.