Carbon nanotube “stitches” strengthen composites

The newest Airbus and Boeing passenger jets flying today are made primarily from advanced composite materials such as carbon fiber reinforced plastic (extremely light, durable materials that reduce the overall weight of the plane by as much as 20 percent compared to aluminum-bodied planes). Such lightweight airframes translate directly to fuel savings, which is a major point in advanced composites’ favor.

But composite materials are also surprisingly vulnerable: While aluminum can withstand relatively large impacts before cracking, the many layers in composites can break apart due to relatively small impacts — a drawback that is considered the material’s Achilles’ heel.

Now MIT (Massachusetts Institute of Technology) aerospace engineers led by Dr. Roberto Guzmán de Villoria (Junior Researcher at IMDEA Materials since January 2012) have found a way to bond composite layers in such a way that the resulting material is substantially stronger and more resistant to damage than other advanced composites. Their results have just been published in the journal Composites Science and Technology.

Check the whole article at MIT news