Week 7-Long Piston With Cam

Objective: Transient analysis on a piston and cam mechanism model is performed and its Equivalent Stress, Directional Deformation and Equivalent Elastic Strain were calculated for 3 different cases.

CASE 1: Frictionless contact

CASE II: Frictional contact with coefficient 0.1.

CASE III: Frictional contact with coefficient 0.2.

1. Geometry:

The Barrel and the Cam are considered rigid body here . The analysis is primarily considering the Cam follower, and the rigid bodies are considered as point masses.

2. Material Data:

3. Case setup and settings:

a. Connections:

i. Contacts:

ii. Joints:

Fixed joint Revolute joint

Translational joint.

b. Mesh:

Face sizing is provided with an element size of 3 mm

c. Analysis settings and input data:

i. Analysis settings: ii. Joint load:

d. Solutions:

(For demonstration, Case 1 is presented).

a. Equivalent stress:

b. Equivalent Elastic Strain:

c. Directional Deformation:

4. Result:

	Equivalent stress	Equivalent Elastic Strain	Directional Deformation
CASE I	387.16	0.00194	10.421
CASE II	498. 77	0.00258	10.471
CASE III	714.87	0.00369	10.536

5. Conclusion:

• The stress increases gradually as the frictional coefficient increases.
• Strain values have a very small increase
• Directional deformation also increases as the frictional coefficient increases.