Roof challenge

ROOF:-

Roof is the uppermost surface of the car or any other passenger vehicle.It protect the passenger from outside condition such as rain,wind,sun,dust,etc.

DESIGN OF ROOF:-

Initially we will be provided with the roof skin from that we have to design all the reinforcement such as Front Rail Roof(FRR),Centre Rail Roof(CRR),Rear Rail Roof(RRR), Bow Roof 1(BR1),Bow Roof 2(BR2).

All the reinforcement used with the roof are to provide the strength to the roof.

DRAFT:-

Draft is given to the part so that while drawing there should be proper removal of the Tool without damaged.

DRAFT ANALYSIS:-

Here in the software we analise the design part so that there should not be any defect in the manufacturing.

Outer Surface

Front Rail Roof

Bow Roof 1

Centre Rail Roof

Bow Roof 2

Rear Rail Roof

BOW ROOF PREDICTION:-

SPAN	Rx	Ry	R	L	t	I	W	OK/NG
FRR-BR1	5733.4311	2643.2942	3618.39	2026.9357	0.75	423.5273	1.615	OK
BR1-CRR	5912.7845	5042.7636	5443.228	2026.9357	0.75	293.7453	1.8809	OK
CRR-BR2	4155.0303	9679.3534	5814.2100	2026.9357	0.75	435.1897	2.13	OK
BR2-RRR	3344.7319	14167.1497	5411.7333	2026.9357	0.75	462.6570	2.0588	OK

Here all the values of W are less than 2.7(W<2.7) Therefore condition satisfied i.e. there is no need to change the position of BOW ROOF.

SNOW LOAD CALCULATION:-

SPAN	Iy	t	alpha	s	Rx	Ry	Qr	OK/NG
FRR-BR1	60.24	0.75	0.9858	358.57	4469.76	2689.8266	0.7480	NG
BR1-CRR	78.83	0.75	0.72169	364.4005	3755.57	5814.4856	0.7364	NG
CRR-BR2	60.45	0.75	0.8742	448.6570	4179.49	10015.739	0.1719	NG

The values of Qr should be greater than 3.1(Qr>3.1) but here all the values of Qr are less than 3.1 that means it is not satisfying the condition.So that we have to make the embosses on the outer surfaces of the roof to increase its strength.