The nose-dive damage while off-roading is too familiar with the people frequenting with the off-road drives. I myself have experienced it once if you see the large voids in the front face especially in the lower area like in the first image below. It basically means you are a sitting duck if you hit something hard or a crest. It will break or push in the area that gets hit as in normal physics to absorb the force. Now to protect that area from nose dive hit, smart thing to do is installing a skid / bash plate. Which will not only try to level the area you are gonna cross but also dissipate the force intended to hit vital organs of your car.
So now you will be thinking which metal to choose for bash plate? Well you can go with iron plates or steel plates if they are strong enough and of certain thickness plus they are cheap but it will add the extra weight, which is very important thing for off road as lighter car use less force to do the same work. You can use duralumin or titanium if your pocket allows they are sturdy and really strong with a fraction of weight associated with iron and steel plate. Lastly you can use aluminum if it has the right thickness and it will not be so heavy on weight and is not so expensive for the pocket.
Here in the following picture if you observe I have used aluminum sheet with a thickness of 4mm. We couldn't bend it by hammering it so we took it to a press so that we can attain the desirable curves but the finished product is of utmost quality and appearance. It's durability will be tested in the continuing journeys of the carnity off-road drives and I'll keep you posted of it's off-road progress.