Fender Design - Wheel Arch Challenge

Fender Design - Wheel Arch

Wheel arch is the semi-circular part of the fender positioned above the wheel of the vechile.

the design of wheel arch of a fender should be such that it must shield wheel and protect both passenger's compartment and padestrian from projection of water,mud and stones.

for the vechile to has its use permit in different countries,the wheel arch of fenders must be compliant with the standards and regulation set by the respective countries.

OBJECTIVE

The while arch challenge is to calculate the wheel arch area and prove wether the given fender of car will pass the european standrads or not.

EUROPEAN STANDRAD

1. The clearance “L” as show in above fig. at all the five sections SA-SA,SB-SB,SC-SC,SD-SD and SE-SE should be grater than 10mm.
2. Wheel guard requirement is the value of “a” shall be more than 5mm at a line 30° forward and 50° rearward from centre vertical axis of the wheel.

PROCESS:-

Sketch is drawn on the wheel face as per the European standards provided and projected on the wheel arch at section SA.SB,SC,SD and SE to measure “L”,”a” and wheel arch area.

THE VALUE OF CLEARANCE “L”

A) Measuring “L” for the given wheel and fender at SB :-

The value of “L” at SB=10.00 mm

B) Measuring “L” for the given wheel and fender at SA :-

The value of “L” at SA=9.94 mm

C) Measuring “L” for the given wheel and fender at SC: -

The value of “L” at SC=0.11 mm

D) Measuring “L” for the given wheel and fender at SD: -

The value of “L” at SD=2.87 mm

E) Measuring “L” for the given wheel and fender at SE: -

The value of “L” at SE=5.97 mm

Table A, the given fender doesn’t pass the European standards for wheel arch at section SA, SC, SD and SE.

Section	Clearance “L” (in mm)	Comments
SA	9.94<10	FAIL
SB	10≤10	PASS
SC	0.11<10	FAIL
SD	2.87<10	FAIL
SE	5.97<10	FAIL

Obtaining the value of clearance “A” for wheel Guard Requirement :-

A) Finding the value of “A” at line 30° forward from center vertical axis of the wheel.

The value of “A” at line 30° forward from center vertical axis of the wheel = 43.626 mm

B) Finding the value of “A” at line 50° rearward from center vertical axis of the wheel.

The value of “A” at line 50° reward from center vertical axis of the wheel = 38.359 mm

Table B : - Clearance “A” obtained at section SB (at 30° forward from center axis), SC (at 50° reward from center axis).

Section	Angle (in deg)	Clearance “A” (in mm)	Comments
SB	30	43.626>5	PASS
SC	50	38.359>5	PASS

From table B, the given fender passes the European standards for wheel arch area only in the case of clearance “A”.

WHEEL ARCH AREA OF THE GIVEN FENDER

Wheel Arch Area = 24432.93 mm²

Wheel Arch Radius = 421.18 mm

SUGGESTIONS TO STYLING TEAM :-

The styling team is required to modify the styling of the fender such that the clearance “L” at sections SA,SC,SD and SE is equal to or greater than 10 mm by increasing the curvature at those section towards outside.

CONCLUSION :-

From the above results obtained, we can conclude that the given fender doesn’t pass the European Standards for wheel-Arch area.