Fender Design - Wheel Arch Challenge
Fender Wheel Arch Report
Objective: To calculate the Wheel Arch area and prove whether the car will pass the Europian standards.
What is a Wheel Arch?
Wheel Arch is the semi-circular part of the fender positioned above the wheel of the vehicle. The wheel arch of a fender should be designed in such a way that it must acts as a shield wheels and protect both passangers' compartment and pedestrains.
Wheel Arch Design Consideration as per the European Standards
Figure 1 Eupopean Standads for Wheel Arch
Here,
1. The clearance 'L' in the above figure for:
SA-SA, SB-SB, SC-SC, SD-SD and SE-SE should be greater than 10 mm.
2. For Wheel Guard Requirement:
The value of 'a' at 30`degree`and 80 `degree`should me more than 5 mm from the outer circumference of the wheel to the wheel arch as shown in the figure.
Calcualation and Results:
In order to determine whether the wheel arch follows the European Standards, a sketch is drawn as shown in the figure (2). which represents the sections SA, SB, SC, SD and SE to measure the clearance 'L', 'a' and the wheel arch area.
Figure 2. Sketch in NX CAD as per European Standards
Calculating the value of clearance 'L' at different sections:
i. L at SA
The value of L at SA=9.9490mm. Hence, this section donot pass the European Standards.
ii. L at SB
The value of L at SB=10.000mm. Hence, this section pass the European standards.
iii. L at SC
The value of L at SC=-0.1137mm. Hence, this section donot pass the Eupropean Standards.
iv. L at SD
The value of L at SD=-2.9026mm. Hence, this section donot pass the European Standards.
v. L at SE
The value of L at SE=-5.9755mm. Hence, this section donot pass the European Standards.
Summary Table for Clearance 'L' at SA, SB, SC, SD and SE:
| Section | Clearance 'L' (in mm) |
Remarks |
| SA | 9.9490<10 | FAIL |
| SB | 10.000=10 | PASS |
| SC | -0.1137<10 | FAIL |
| SD | -2.9026<10 | FAIL |
| SE | -5.9755<10 | FAIL |
Hence, from the above table it is clear that this wheel arch donot pass the European Standards at sections SA, SC, SD and SE.
Calculating the calue of clearance 'a' at different sections:
i. 'a' at SB
The value of 'a' at line 30 degree forward from the centre vertical axis of the wheel = 43.6263mm. Hence, this section passed the European Standards.
ii. 'a' at SC
The value of 'a' at line 50 degree at the right side from the centre vertical axis of the wheel = 38.3597mm. Hence, this section passed the European Standards.
Summary table for clearance 'a' at SB and SC:
| Section | Clearance 'a' (in mm) | Remarks |
| SB | 42.6263>5 | PASS |
| SC | 38.3597>5 | PASS |
Hence, from the above table it is clear that the Wheel arch passed the European Standards in case of clearance 'a'.
Calculation of Wheel Arch Area:
From the above figure, the wheel arch area = 24432.9334 mm^2.
Conclusion:
Taking all data into consideration, we can come to a conclusion that this wheel arch donot pass the European Standards as in most of the cases this wheel arch design donot match the standards.