Roof challenge

Aim:For the Given Roof styling, Develop the essential flanges and reinforcements, Provide appropriate dimension and check for Draft analysis and to do a curvature study on the roof and perform calculations to determine the position of the Bow-roof.

Introduction : An automobile roof or car top is the portion of an automobile that sits above the passanger compartment, protecting the vehicle occupants from sun, wind, rain, and other external elements.

Now we design the roof with the creation of a roof ditch area the tool opening angle is only 3 degrees.

Roof Designed:

Front Roof Rail:

BOW Roof 1:

BOW Roof 2:

Rear Roof Rail:

Section odulus of Master Section:

Front Roof Rail:

BOW Roof 1:

Center Roof Rail:

BOW Roof 2:

Rear Roof:

Calculation to determine the Position of BOW Roof

Bow – roof prediction Formula

W = [1.73 x 10^(-3) x L] + [1.85 x 10^(-8) x (R^2)/t] + [ 1.10x10^(-3) x l] - 2.68

Judgement Condition : OK< 2.7> 3.1

Where

L = Roof Length in X-Direction[mm](Roof dimension in 0-Y)

R = Roof curvature

R = 2(Rx*Ry)/(Rx+Ry)

Rx = X curvature

Ry = Y curvature

t = Roof plate thickness [mm]

l = Bow Roof Span [mm]

Result: The Roof is designed according to the specified requirement and position of BOW roof and Heat Distrotion Criteria is clculated.