Quote:
Originally Posted by xlr8tr
well said- or a guardrail, or wall, or.....
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I think we are talking about different things. Im talking about side impact from a vehicle.
That may happen if you slid sideways into a pole or similar. If you are in this position then the bolts will be least of your worries. For that sort of collision you actually want the side intrusion bars to deform a bit to absorb energy.
First of all you are assuming that the side impact is a very narrow object that only impacts the door. In reality this is very unlikely to happen due to the size of cobra door (or ferrari).
If a car is hitting you from the side you are in most cases going to be crossing an intersection where you are both crossing paths (such as someone running a red light). In this case there will not be trees or walls in that direction, there will be road. If it is a T intersection it will be very unlikely they will t bone you. You will t bone them or run up the back of them.
This link will show you why i talk about tyres. Select tab for side impact test and press play. Notice what the car does when tested. The impact is absorbed by both the friction of the tyres and crumple zone of the front of the other car.
ANCAP - Crash Testing Explained.
You also need to consider what is going to happen to the driver. In a cobra, the top edge of the door is quite low. When the car is hit from the side the driver will be whipped towards the incoming car. If it is a 4wd it may go over the bars.
There is much more to crash science than a point load in the middle of a side intrusion bar. The shear capicity of each bolt in the striker is several thousands Kgs. The full impact is also not applied only on the bolts it is also carried by the hinges and any other part of the car that is hit.
There is also the thicknes of the striker plate/latch to consider as it is probably less than the bolts