Finite Element Analysis of Buckle - Clip using Ansys Workbench

Objective: Compare the Finite Element Analysis results obtained by using 2 different conditions for Buckle-clip and write a detailed report explaining the results obtained.

Question:

Mesh the buckle clip model in such a way that the overall number of elements is less than 31,000. It is mandatory to bring it under 31K.

Simulate the component for both kinds of motion

• Moving the buckle by keeping the clip fixed
• Moving the clip by keeping the buckle fixed.

If one of the motion is not converging, explain why that particular motion when simulated did not converge.

Results and Deliverables

• Stress generated at the base of the clip
• Contact pressure generated between the outer clip surface and buckle surface
• Total deformation of the clip

Case Setup and Execution:

Model:

Boundary Conditions:

Material: POM

Contacts: Contacts has been applied as shown below.

Mesh: Size of element- 4.4mm.

Face Sizing is applied to the contact faces with size of element - 1mm.

Analysis Settings:

Case-1: Moving the buckle by keeping the clip fixed.

Fixed Support: Fixed Support has been applied to the clip as shown below.

Displacement: Displacement has been applied to the buckle in +ve Z-axis direction as shown below.

Results:

Equivalent Stress of the clip:

Contact pressure generated between the outer clip surface and buckle surface:

Total deformation of the clip:

Case-2: Moving the clip by keeping the buckle fixed.

Fixed Support: Fixed Support has been applied to the buckle as shown below.

Displacement: Displacement has been applied to the clip in -ve Z-axis direction as shown below.

Results:

Equivalent Stress of the clip:

Contact pressure generated between the outer clip surface and buckle surface:

Total deformation of the clip:

Results Comparison & Conclusion:

Results Comparison:

CASE	Equivalent Stress of the Clip(Mpa)		Total Deformation of the Clip(mm)		Contact Pressure(Mpa)
	Max	Min	Max	Min	Max	Min
1	49.366	7.20E-09	9.2637	0	23.661	0
2	73.183	2.11E-07	49.833	0.2925	26.385	0

• Total deformation of the clip is higher in case-2 because the clip is moving and the buckle is fixed.
• Equivalent Stress, Contact Pressure is lower in Case-1.