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TPI Composites General Manager Kevin Weldi poses with the new Humvee  (Source: Associated Press)
New composite Humvees shed 900 pounds of weight

Humvees are synonymous with transporting troops on the ground during times of war. The ubiquitous workhorses are also pretty lacking when it comes to protection from enemy fire and improvised explosive devices (IEDs).

The U.S. Army in conjunction with AM General Corp. and TPI Composites Inc. are looking to composite materials to give its soldiers a better chance at surviving treacherous working conditions on Iraq.

Its latest test bed is a Humvee that features a frame and body made of composite materials. Resin material is used to bond together balsa wood, carbon reinforcements, fiberglass and foam. The use of composite materials on the Humvee shaves 900 pounds off the usual 10,000 to 12,000 pound vehicle weight.

"We can put the strength where we need it," said TPI Composites CEO Steven Lockard. "Every pound of weight we save, that weight is being added back to the vehicle in armor and mine-blast protection."

Additional armor could be placed under and around the cabin area of the Humvee to protect the passengers, while the composites materials alone could be used for the hood and fenders.

Predictably, the new composite-bodied Humvees are slightly more expensive than their conventional counterparts and the Army still hasn't made a firm commitment to purchasing the vehicles.

With that said, TPI Composites is fully prepared should the Army give the company the green light. "We could ramp up pretty quickly to most any volume that would be desired," said Lockard.





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By DeepBlue1975 on 9/21/2007 10:23:39 AM , Rating: 3
Not necessarily true:

For example, by these days its very usual that car designers make the front of the car more flexible as to be able to absorb impact energy, but reinforce the part where people are to make it as little deformable as possible.

As someone replied you, there are materials out there which are lighter than steel but yet more resistant, like carbon fibre, so that steel shouldn't be a mandatory part (were it not for the low cost of steel versus better materials).

Not always a harder frame means higher crash protection (well, it might be better for the vehicle to be less deformable, but it is not for the passengers that, then, will have to stand most of the impact's energy transferred directly to their bodies instead of having the body of the car absorb that as much as possible).

At least I'd rather get a car that gets destroyed in a crash but keeps me alive, instead of one that gets little damage but also gives me little probability of surviving :D


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