Fender Design - Wheel Arch Challenge

Wheel Arc

#Objective: To Calculate the wheel arc area and prove whether the car passes the European standards or not.

#Introduction:

• The wheel arch is the semicircular part positioned above the wheel of a vehicle.
• The Wheel arch design should be such that it covers the wheel and protects the people inside the car cabin and also pedestrians from a splash of dust and water particles.

#Representation chart for European Standards for Wheel arc design

• The Letter "L" here represents the clearance between the wheel edge and the wheel guard, which should be greater than 10mm.
• Wheel guard requirement: The value of 'a' must be greater than 5mm at Bb and Cc which are at angles(degrees) 30 and 50 respectively.

#Observations:

Output extracted from Siemens NX

I created this sketch on the wheel perimeter's plane and projected sections Aa and Bb upwards and Cc, Dd, and Ee downwards on the arc to measure the Wheel arc area and values for clearance L, and Wheel guard clearance 'a'.

I) Determining the Fender's Wheel Arc Area

The area of Wheel Arc is 24432.9334 sq. mm.

II) Determining the Value of clearance "L".

1. For Section Aa, L=9.9490mm.

2. For Section Bb, L=10mm.

3. For section Cc, L=-0.104198mm.

4. For section Dd, L=-2.8873mm.

5. For section Ee, L=-5.9906mm.

#Observation table: The threshold value for L is 10mm.

Section	Clearance(mm)	Remarks
Aa	9.9490	Failed
Bb	10	Passed
Cc	-0.104198	Failed
Dd	-2.8873	Failed
Ee	-5.9906	Passed

Thus from the above table, we conclude that the Fender Couldn't pass the European standards.

III) Determining the Value of Wheel guard clearance "a".

1. For section Bb, a=48.4813mm. 2. For Section Cc, a=44.6067mm

The threshold value for "a" is 5mm.

The above data collected for Wheel guard clearance from sections Bb at 30 degrees and Cc at 50 degrees from the vertical axis has passed the European Standards.

#Results: After Analysing overall data, we conclude that the car doesn't pass the European standards.