Fender Design - Wheel Arch Challenge

FENDER DESIGN -WHEEL ARCH CALCULATION:

• OBJECTIVE-calculate the wheel arch area of european standard and prove wheather the car will pass the standards or not.

• INTRODUCTION:-The wheel arch is an arch -shaped cavity in the body of a vehicle,which houses a wheel.it has two important functions .it seves for the safety of pedestrians and other cars because the wheel is situated in the body of a vehicle .the second function is to protect the car from the sticky materials such as mud may adhere to the smooth outer tire surface while smooth loose objects such as stones can be ejected from the surface of the tire at high velocity as the tire imparts kinetic energy to the attached objects for a vehicle moving forward the top of the tire is rotating upward and forward and can throw objects into the air at other vehicles or pedestrian in front of the vehicle.

• TYPES OF WHEEL ARCH REGULATIONS-
• JAPAN REGULATIONS
• measure clearance L of tire ,hub,cap & fender in three different positions within area k and produce clearance check chart to validate.
• clearance must be greater than 5 mm in all the three positions.
• wheel guard reqmt the value of a shall be more than 5 mim at a line 30"forward and 50reward from the central vertical axis of axis of wheel.

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• EUROPEAN REGULATIONS-
• Measure CL L at sections SA-SA,SB-SB,SC-SC,SD-SD,SE-SE and produce CL check chart to validate
• At all five sections the CL L value should be greater than 10mm to satisfy the european regulations
• wheel guard reqmt the value of a shall be more than 5 mm at a line 30" forward and 50"rearward from the central vertical axis of the axis of wheel.

• US REGULATIONS-
• Make clearance check details on all positions from -100" to 100" & make the clearance check table
• All values should be greater than 5mm to satisfy the regulations .the value of'a' shall be more than 5mm at a line 30" forward and 50"
• rearward from the central vertical axis of the axis of wheel.

• ANALYSIS-
• There are different regulations in this regard based on different regions this analysis has been done according to european regulations
• The parts file was opened using NX CAD and the points were plotted on the wheel arch after taking the required measurements from the wheel centre.

• The clearance value 'L' was measured and found to be as follows sections required clearance(mm) measured clearance 'L'(mm) remarks
• SB 10 10 PASS

• SA 10 9.94 FAIL

• SC 10 1.624 FAIL

• SD 10 2.88 FAIL

• SE 10 5.99 FAIL

From the above observations the positions SA SC SD SE are less than 10mm which is necessary to pass the european standerds hence the frontfender wheel arch doesnot pass the european standerds

SUGGESTIONS TO STYLING TEAM-

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