GM Silverada Beats F250 In Frame Twist Test

ktosv wrote:

spoon059 wrote:
Built in frame flex will prevent fatigue, leading to a frame that is more durable.

Care to expand on this thought process?

I'm not an engineer, so I can't really explain it.

http://trailer-bodybuilders.com/archive/tips-truck-frames

I've got to go to work, so I don't have time to find other references. Basically the argument is that steel needs to have some flex. Without flex it bends. When it bends it becomes fatigued. When it has fatigue, it is more likely to fail. To prevent it from failing, engineers allow for some flex.