Eng 45 - Chapter 1 - Structure(11)

Eng 45 - Chapter 1 - Structure(11) - Materials Scien ce...

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Materials Science Fall, 2007 Page 10 in the 1960's several companies in the United States, Europe and Japan developed composite structural materials that utilized graphite fibers as the strengthening element, and offered combinations of strength, rigidity and low density that exceeded all other materials. Engineers at Rolls Royce moved quickly to adopt these for fan blades in the advanced jet engine they had contracted to build for the Lockheed L-1011 jumbo jet. Very shortly thereafter Rolls Royce was bankrupt. While the graphite fiber composites had excellent mechanical properties under normal loads, they had very little resistance to the impact of particles that were directed perpendicular to the axis of the aligned fibers. Objects that were commonly ingested into the engines, such as birds, pebbles and raindrops, impacted the composite fan blades and destroyed them. While this particular venture into composite materials technology was unsuccessful to a degree that bordered on catastrophe, the very real advantages of
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This note was uploaded on 01/26/2010 for the course ENGLISH 45 taught by Professor Morris during the Spring '10 term at Berkeley.

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Eng 45 - Chapter 1 - Structure(11) - Materials Scien ce...

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