Universal Joint

AIM:

• To perform transient structural analysis of Universal joint and evaluate the stress and deformation results.

OBJECTIVES OF THE PROJECT:

• To assign Structural steel, stainless steel and titanium alloy material for the Shaft A.
• To define the joints for the ball joint.
• To define Joint loads.
• To mesh the model.
• To evaluate the stress, deformation and strain in the work piece.

PROCEDURE:

• Case 1 – Structural steel
• OPEN WORKBENCH21 > NEW PROJECT > TRANSIENT STRUCTURAL.
• This will start a new transient structural project.
• Rename the project as Case1.
• Go to ENGINEERING DATA > STRUCTURAL STEEL.
• Then double click on Geometry. This will open the Spaceclaim.
• In Space claim check the model for any dents or irregularities.
• 
• The geometry looks good, exit the Spaceclaim.
• Then double click on Model. This will open Mechanical module.
• Now, rename the geometry as Shaft A, Shaft B, ball A, ball B and coupler.
• Then assign Structural steel to all the parts.
• 
• Then go to CONTACTS > CONTACT > DELETE ALL CONTACTS.
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-GROUND > TYPE = FIXED > SCOPE = SPRING END.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-GROUND > TYPE = REVOLUTE > SCOPE = SHAFT B.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-GROUND > TYPE = REVOLUTE > SCOPE = SHAFT A.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-BODY > TYPE = REVOLUTE > REFERENCE SCOPE = BALL B > MOBILE SCOPE = SHAFT B.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-BODY > TYPE = REVOLUTE > REFERENCE SCOPE = BALL B > MOBILE SCOPE = COUPLER.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-BODY > TYPE = REVOLUTE > REFERENCE SCOPE = BALL B > MOBILE SCOPE = SHAFT B.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-BODY > TYPE = REVOLUTE > REFERENCE SCOPE = BALL B > MOBILE SCOPE = COUPLER.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-BODY > TYPE = REVOLUTE > REFERENCE SCOPE = BALL A > MOBILE SCOPE = SHAFT A.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-BODY > TYPE = REVOLUTE > REFERENCE SCOPE = BALL A > MOBILE SCOPE = COUPLER.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-BODY > TYPE = REVOLUTE > REFERENCE SCOPE = BALL A > MOBILE SCOPE = SHAFT A.
• 
• CONNECTIONS > INSERT > JOINT > TYPE = BODY-BODY > TYPE = REVOLUTE > REFERENCE SCOPE = BALL A > MOBILE SCOPE = COUPLER.
• 
• This will define the Joint loads.
• Now, go to MESH > ELEMENT LENGTH = 4MM > GENERATE MESH.
• 
• The mesh will be generated on the model.
• Then go to STATIC STRUCTURAL > ANALYIS SETTINGS > NO OF STEPS = 5 > AUTO TIME STEPPING = OFF > TIME STEP = 0.1S > TIME INTEGRATION = ON > LARGE DEFLECTION = ON > WEAK SPRINGS = PROGRAM CONTROLLED > OUTPUT CONTROLS = YES.
• 
• Go to STATIC STRUCTURAL > INSERT > JOINT LOAD = REVOLUTE – GROUND TO SHAFT B > TYPE = ROTATION > MAGNITUDE = TABULAR DATA.
• 
• 
• Then, go to SOLUTION > INSERT > STRESS > STRAIN > DEFORMATION.
• 
• This will set the output results.
• Then SOLUTION > SOLVE.

• Case 2 – Stainless Steel
• Create a duplicate project of the case 1 and rename it as case 2.
• Go to ENGINEERING DATA > STAINLESS STEEL > ADD.
• 
• Then open Mechanical module.
• Assign Stainless steel to shaft A.
• 
• Go to SOLUTION and SOLVE.

• Case 3 – Titanium Alloy
• Create a duplicate project of the case 1 and rename it as case 3.
• Go to ENGINEERING DATA > TITANIUM ALLOY > ADD.
• 
• Then open Mechanical module.
• Assign Titanium alloy to shaft A.
• 
• Go to SOLUTION and SOLVE.

RESULTS:

• Case 1 – Structural steel
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• Case 2 – Stainless Steel
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• Case 3 – Titanium Alloy
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COMPARISON TABLE:

	Stress (MPa)	Strain	Deformation (mm)
Structural Steel	1496.4	7.6085E-3	38.637
Stainless Steel	1448.9	7.6326E-3	38.637
Titanium Alloy	733.99	7.7674E-3	38.637

• We can observe that, Structural steel produces more stress than Stainless steel and Titanium alloy.
• The variation in strain rate is observed to be less.
• The deformation remains constant.

LEARNING OUTCOMES:

• To setup transient structural analysis
• To assign material from the material library.
• To define joint loads.
• To define rotation for Shaft B.
• To deploy mesh on the geometry.
• To define output results.

CONCLUSION:

• By performing this project we conclude that the Transient analysis of Universal Joint is performed and the stress, strain and deformation results are obtained.

MODEL LINK:

https://drive.google.com/file/d/1KrWaemy_OsZ9lsNhyU3ESSw_lSUqbds_/view?usp=sharing