Fender Design - Wheel Arch Challenge

FENDER-WHEEL ARCH CALCULATION

INTRODUCTION:

What is “WHEEL ARCH?”

Wheel arch is one of the BIW components of automotive bodywork in the fender part and it can be defined as the semicircular shaped part that has to be positioned above the wheel of a vehicle. The most important body change was that the front wheel arch was cut higher into the fender.

Fig_1: Wheel arch

Need of “WHEEL ARCH”

Wheel Arch in Fender Design consideration it plays major role to keeps wheel / tyre keeps inside of the wheel housing and it also provides to keep all possible motions of the wheel in a vehicle.

WHEEL ARCH REGULATIONS

Wheel arch it can be vary for region to region and it have specified regulations itself while calculating the wheel arch. And the various types of wheel arch regulations are listed below,

• Japan Regulation
• European Regulation and
• US Regulation

1_JAPAN REGULATION

According to this Japan wheel arch regulation that wheel guard required value should be more than 5 mm at line 30^o forward and 50^obackward of from the centre axis of wheel.

Fig_2: Japan Regulation

From this japan regulation it has 3 control points and these are SA-SA, SB-SB, AND SC-SC should keep more than 5mm of Clearance length it has to be passing this regulation.

2_EUROPEAN REGULATION

According to this European wheel arch regulation that wheel guard required value should be more than 10 mm at line 30^o forward and 50^obackward from the wheel centre and we also consider from the 0^o line 150 mm of height that interesting point and the inter-maiden of these two points also considered to maintains its clearance length of more than 10 mm.

Fig_3: European Regulation

From this European regulation it has 5 control points and these are SA-SA, SB-SB, SC-SC, SD-SD, and SE-SE should keep 10 mm of the clearance length it has to be passing this regulation.

3_US REGULATION

According to this US regulation check all the clearance length of the wheel arch -100^o to 100^o of every 10^o of its section should keep more than 10 mm of gap it will passing this regulation. In this regulation it has 21 control points itself and all these should maintain the same gap.

Fig_4: US Regulation

FENDER-WHEEL ARCH CALCULATION:

OBJECTIVE:

To calculate the wheel arch from the given fender and also check whether it is has passing the standard regulation.

GIVEN DATA:

Fig_5: Wheel arch Skin data ref (given)

CALCULATION:

TOOL USED: NX_12

Assume,

As we consider this given data of fender to made assumption to calculate and check the wheel arch for the “EUROPEAN REGULATION”.

By using NX-12 tool to calculating clearance length of the given fender results of SA-SA, SB-SB, SC-SC, SD-SD, and SE-SE are shown in following as below,

Control Points	CL Required (in mm)	CL Obtained O/p (in mm)	Remarks (Pass/Fail)
SA-SA	10	9.9490	Fail
SB-SB	10	10	Pass
SC-SC	10	0.1139	Fail
SD-SD	10	2.8875	Fail
SE-SE	10	5.9973	Fail

Table_1: Wheel arch CL outputs

Fig_6: Wheel arch CL output

CONCLUSION:

According to the European Regulation thus clearance length of all the 5 control points it keeps more than 10 mm itself. But this given fender may results on its clearance length only SA-SA has 10 mm of gap, and remains all of this SB-SB, SC-SC, SD-SD, and SE-SE may results to fail.

And hence we conclude this fender has not passing in this European Regulation. So that we suggest styling team to keep modify this given fender in wheel arch area to maintaining the clearance gap.