Objective:-

calculate the wheel arc gap at the given model Half bumper of front Fender. It functional requirement ,important regulation to the European standard

Introduction:-

wheel arc calculation neccesary to required to design fender portion to pass the local regulation which are based to the local road conditions.

Wheel arch is a semi-circular area in fender, which houses the wheel well. It should have a sufficient clearance between tyre and wheel arch it's maintain 10mm in Europ and US and little bit 5mm maintain japan regulation, So, that it doesn’t touch the wheel arch area during suspension. The clearance value differ from region to region, here are few regulations.

European Regulation Standard:

The clearance value will be more than 10mm at 30 degrees at forward and 50 degree at backward and line 150mm above X-axis and Mid-point between 50 degree and line above 150mm.

Japan Regulation Standard:

The clearance value will be more than the 5mm at 30 degree at forward and 50 degree at backward from the central vertical line.

US Regulation Standard:

Make clearance check details on all position from -10 to 180 degrees. All values must be greater than 5mm.The Clearance Value will more than 5mm at line 30 degree forward and 50 degree backward from central vertical axis.

Wheel Arc Calculation

This is carried out for pedestrian safety of the car, here by using the European regulations requirement to define the design given for calculation.

As required to plot the coordinates,

coordinates SB, SB, SC, SD and SE are plotted using the angles and dimensions according to the requirement standard.

Next the points are checked if they provide a gap of 10mm from the outer part of fender to the outer most part of the tier, if it is more than 10mm it meets the safety requirement if it is below 10mm it doesn’t meet the standard.

he above figure shows the following result

SB plot satisfies the 10mm distance

• SA plot satisfies the 10mm distance
• SC plot doesn’t satisfy, there is 3mm clearance which doesn’t go with the standard.
• SD plot doesn’t satisfy, there is 0.25mm clearance which doesn’t go with the standard.
• SE Plot doesn’t satisfy, there is -3.4mm clearance which doesn’t go with the standard.

Conclusion

Hence we can declare that the following fender wouldn’t pass the standards the styling team must redesign the fender.