Originally Posted by nthach
Originally Posted by 4WD
A big issue in ladder frames, was getting them to where they crushed more and still offered some protection. The really old trucks ? When they hit something solid, just as well be in a tank.
The driver took the hard hit. They made them all to crush now - stuff airbags everywhere.
Thank advances in metallurgy and engineering. While GM was the first to hydroform aluminum for structural elements of the Corvette, Ford took that technique along with HSLA steel(that Mercedes and Volvo used a decade before) to form the frame on the later Panther cars. It allowed the frame to be designed to be strong yet yield in a crash.
Crumple zones are engineered to fail in the interest of hopefully keeping the occupants inside of a car from getting seriously injured in a crash.
What with all the recalled Toyota frames one got a chance to look closely at the scrap piles at the Toyota dealers. Those ladder frames are anything but straight--by not making perpendicular but giving all sorts of angles, I think I can see how they can be stiff in one direction yet yield easily in any other.