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University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2013.

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Presentation on theme: "University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2013."— Presentation transcript:

1 University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2013

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12 For externally pressurized vessels (e.g. a submarine hull) the foregoing stress formulas should be used with extreme caution, because another failure mode comes into play: Instability due to wall buckling Buckling is covered in Part 4 of this course Warning

13 University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2013 Digression: “Arrow Conventions” for Forces, etc Are these equivalent? Yes, and unambiguous

14 University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2013 How About This One? What does it mean? Hard to say beforehand. Depends on convention(s). Best is to avoid “double negatives” in technical work

15 University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2013 Double Negatives are Ambiguous... You aint’t going nowhere Does it mean You are not going anywhere or You are going somewhere A. It depends on context

16 University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2013 In This Context (Bob Dylan 1967) Obviously here You are not going anywhere Buy me a flute and a gun that shoots, tailgates and substitutes, Strap yourself to the tree with roots, You aint’t goin’ nowhere.


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