Ann, while the application of composites for the booster is new stuff, their use in the spacecraft itself is old hat. I worked at one spacecraft plant where we made our own composites from raw materials. One of our direct competitors, with whom we were merged later on, got their composites from a company whose main business was railcars. It was an interesting revelation when we found out.
I actually worked on the testing of the UARS satelite structure. It was the first large composite structure. If you recall, UARS recently fell back to earth. It was one of the largest satellites to do so. It was the size of a school bus and filled the Shuttle cargo bay. In testing we found some interesting things out about how the composites reacted structurally. Now, this was in the 1980s. It would have been nice to have some of the more robust CAE tools available today.
I will be the first to say that I am scared to death of flight composites (see Airbus failures, give me a DC-9 (shut up old man :-)), but I am also aware that these are amazing pieces of hardware. Congrats on the phenominal achievement of space-rated composites!
notarboca, if you're referring to the Airbus wing failures http://www.designnews.com/author.asp?section_id=1392&doc_id=245829 those were not caused by a composite problem, but by a problem with an apparently mis-spec'ed aluminum alloy and the misunderstanding on the part of design engineers about how to interface that alloy with composites. Also, it took 10 years for that problem to show up, and so far there have been no accidents caused by it. Personally, I'm more concerned with the airlines' lowered maintenance standards for commercial aircraft.
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