These are the notes for the MES video Exam Problem by Dr. Judy Wood: Space Shuttle Columbia Disaster, as a PDF: the EM 304 test problem Dr. Judy Wood set at Clemson University on February 6, 2003, the review of mechanics of materials, the full solution, and the Columbia Accident Investigation Board's findings.
Prefer a web page? The same notes, with the video, are at mes.fm/space-shuttle-columbia. The PDF (36 pages) is shown below; you can also download it, or use the OneDrive link.
About these notes
Dr. Judy Wood's original test is on its own page: mes.fm/em-304-problem-1-judy-wood. Try the numbers yourself with the MES Mechanics of Materials calculators (thermal stress, Young's modulus, shear).