Fender Design - Wheel Arch Challenge
WHEEL ARCH
The wheel arch is designed considering all possible motions the tire undergoes while the vehicle is in motion. The wheel arch also ensures stopping any debris that could possibly fly outside the wheel well and hit pedestrians. HIGHLIGHTED PART IN IMAGE IS CALLED WHEEL ARCH.
European standards for wheel arch
A.The clearance L as shown in above fig at all the five sections SA-SA,SB-SB,SC-SC,SD-SD and SE-SE should be greater than 10mm.
B.The value of a shall be more than 5mm at a line 30 degrees forward and 50 degrees rearward from the ceter vertical axis of the wheel.
SOFTWARE: NX CAD
Sketch is drawn on wheel arch face as european standards
A. Calculating the value of clearance" L"
1.Measuring "L" for the given wheel and fender at SB:
The value of clearance "L" at SB = 10.00 mm
2.Measuring "L" for the given wheel and fender at SA:
The value of clearance "L" at SA = 9.9490 mm
3.Measuring "L" for the given wheel and fender at SC:
The value of clearance "L" at SC = -0.1139 mm
4.Measuring "L" for the given wheel and fender at SD:
The value of clearance "L" at SD = -2.8621 mm
5.Measuring "L" for the given wheel and fender at SE:
The value of clearance "L" at SE = -5.9409 mm
Clearance "L" calculated values of sections SA, SB, SC, SD and SE
| Section | Clearance "L" ( in mm) | Approve |
| SA | 9.9490 < 10 | Fail |
| SB | 10.00 ≤ 10 | Pass |
| SC | -0.1139 < 10 | Fail |
| SD | -2.8621 < 10 | Fail |
| SE | -5.9409 < 10 | Fail |
B. Calculating the value of clearance " a" wheel guard requirement
The value of clearance "a" at 30 degrees forward section SB = 46.1330 mm
The value of clearance "a" at 50 degrees rearward section SC = 38.6697 mm.
Clearance "a" calculated values of sections SB and SC
| Section | Angle (in deg) | Clearance"a"(in mm) | Approve |
| SB | 30 | 46.1330 > 5 | Pass |
| SC | 50 | 38.6697 > 5 | Pass |
Suggestions to styleing team
The styleing team is required to modify the styleing surface of the fender such that the clearance"L" at section SA,SC,SD and SE is equal to or greator than 10 mm by increasing the curvature at those sections towards outside.