Week 7-Long Piston With Cam

OBJECTIVE:-

• To perform a transient analysis on a piston and cam mechanism model that has been provided.

PROCEDURE:-

Geometry:

Mesh:-

The model was given the default mesh, only the contact faces were meshed with 3mm size.

Boundary Conditions:-

The simulation is made to run for 9 steps with Larger Deflection kept as ON.

A fixed Joint was created.

A Translational Joint is created as shown.

A Revolute Joint was created with respect to the Ground.

A Joint Rotation was created.

CASE 1:-

Contacts:

Frictionless was assigned in this case.

RESULTS:-

Directional Deformation:-

Minimum: -3.5527e-15 mm ; Maximum: 20.352 mm

Equivalence Stress:-

Minimum: 6.1889e-17 MPa ; Maximum: 1584 MPa

Equivalence Elastic Strain:-

Minimum: 6.5102e-22 ; Maximum: 7.9671e-3

CASE 2:-

Contacts:

Co-efficient Friction of 0.1 was assigned in this case.

RESULTS:-

Directional Deformation:-

Minimum: -3.5527e-15 mm ; Maximum: 20.46 mm

Equivalence Stress:-

Minimum: 6.1889e-17 MPa ; Maximum: 1858.1 MPa

Equivalence Elastic Strain:-

Minimum: 6.5102e-22 ; Maximum: 9.336e-3

CASE 3:-

Contacts:

Co-efficient Friction of 0.2 was assigned in this case.

RESULTS:-

Directional Deformation:-

Minimum: -3.5527e-15 mm ; Maximum: 20.508 mm

Equivalence Stress:-

Minimum: 6.1889e-17 MPa ; Maximum: 5484.6 MPa

Equivalence Elastic Strain:-

Minimum: 6.5102e-22 ; Maximum:2.753e-2

CONCLUSIONS:-

Frictional Co-efficient	Directional Deformation, mm		Von-Mises Stress, MPa		Equivalence Strain, mm/mm
	Max	Min	Max	Min	Max	Min
0	20.352	-3.5527e-15	1584	6.1889e-17	7.9671e-3	6.5102e-22
0.1	20.46	-3.5527e-15	1858.1	6.1889e-17	9.336e-3	6.5102e-22
0.2	20.508	-3.5527e-15	5484.6	6.1889e-17	2.753e-2	6.5102e-22

As Frictional force always tends to act opposite to motion of the body, it causes more restriction against the motion and hence the equivalent stress, strain increases as coefficient of friction increases.

Link- https://drive.google.com/file/d/1xfI8UKr1P-4G56rT_DRFn_qAXEcLN6NN/view?usp=sharing