Week 8 - Universal Joint

UNIVERSAL JOINT SIMULATION

Universal Joints are basically used as power transmission devices in the heavy commercial vehicles where the engine is basically at the front and the power is transmitted to the rear axles with the help of properller shaft using universal joints.

In this Double Universal Joint Simulation we wii be observing the behaviour of the joint uderr constraint with different material properties viz:

CASE I: Structural Steel

CASEII: Titanium Alloy

CASEIII:Stainless Steel

CASE I:

GEOMETRY:

Fig.Geometry of Double Inoversal Joint Simulation

JOINTS:

Fig. Joints Analysis

In the above joint probe the A joint which at the tip of spring of double universal joint is fixed and the surface of the joints are given body to ground revolute joints.THe rest of thejoints between the spider and the yoke shaft are body to body revolute joints.

MESH:

Fig. Mesh generated for the simulation

Fig.Element Quality

In the above the element quality is averaged near ti 0.789 which is quite suitable.

BOUNDARY CONDITIONS:

Fig. Boundary Conditions

In the above the driving ending of the joint is rotated with an angle of 150 degrees in 5 sub-steps of 30 degrees each.

SOLUTION:

Fig. Total Deformation For CASE I

Fig.VonMises Stress for CASE I

Fig. Equivalent Strain For CASE I

Fig. Joint Force Reaction at the Driving end of Joint

Fig. Joint Force Reaction at the Non Driving end of Joint

CASE II: Titanium Alloy

In this Case the the material property of the joint has been changed to titanum alloy

SOLUTION FOR CASE II:

Fig.Deformation For CASE II

Fig. Von Mises Stress For CASE II

Fig. Strain For CASE II

Fig. Joint Force Reaction at the Driving end of Joint

Fig. Joint Force Reaction at the Non Driving end of Joint

CASE III: Stainless Steel

Fig.Total Deformation For CASEIII

Fig. Von Mises Stress For CASE III

Fig.Strain For CASE III

Fig.Joint Probe Reaction For Driving end

Fig.Joint Probe Reaction For Non Driving end

CONCLUSION:

Sr No.	CASE	MATERIAL	TOTAL DEF (mm)	VON MISES STRESS (MPa)	ELASTIC STRAIN
1	I	Structural Steel	38.637	1809.2	0.0096
2	II	Titanium Alloy	38.637	874.78	0.0097
3	III	Stainless steel	38.637	288.94	0.0015

From the above it is clear that the deformation will be the same irrespective of the material conditions and the stress and strain will be varied accordingly, so by the above time it is clear that Stress is higher in Structural steel and lowest in stainless steel and same as of strain is higher in titanum and lowest in stainless steel.