Quiz 11bb solutions - MCEG 3013 Quiz 11 bb Fran f Personal...

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Unformatted text preview: MCEG 3013 Quiz 11 bb March 15, 2016 Fran f' Personal Notes and Class Handouts ONLY 1. The two pressure tanks shown are both constructed from 6061-T6 A1 with a maximum tensile strength of 60 ksi, 1/2 thick. The only difference between them is that one is welded on a helix, the other on a 90 degree axis. Both contain pressurized gas that causes a hoop stress of 50 psi, which is a principle stress. Longitudinal stresses in any thin-walled pressure vessel are always exactly 1/2 the magnitude of the hoop stress. Sketch the unit cube outlined on each tank, showing all applied stresses on each cube, in equilibrium, with proper notation, signs and units. 20 pts. ‘imm’m aéflr/ For {We'd 9" {/é VH7?“ 6944/5 ——_/_/_?f f’éfkvV/Z: 1/./ C:\Data Files\Course Data\MCEG 3013\Spring 2016\Quiz ll bb 041516.0dt 1/2 The ultimate tensile strength of 606l-T6 Al is 60 ksi, and tauowable for the welds is 30 ksi. What is fawn-ed on the x axis face of each unit cube?10 pts. %M {5 IV” ”W” 5M“ K ”iff/cd/ an M? ,X @993 fififlcflfi 93%! 7‘47 flrr’ In /*‘r"h(7fl/{ af'fryvfé/lflm What is the resolved normal stress perpendicular to the weld contained in the unit cube for tank (a) ? 10 pts. 90 psi —: 0; 4(7):}; yffi, 6]” (@MIéf/ mfflh/ o-va 5,741., fie/W Jami} W X 5|”.an / fi/il’t‘zifl {‘45 (Aaéfll /0'n?2‘.fffifit’z’ffl/ Are there any shear stresses acting on the unit cube of tank (b)? 20 pts. If; *‘fi 04' [1’17 flfé/ Any/g) r(/), flrf Mv/“l’g'cxg_ If - WM? 17; (”4" if or“? @Léé/jfl M [pupa/fix flfl’m’é 0 Are there any shear stresses acting on the material of tank (a) at all? 10 pts 15"?" *fia’t’ ébvfi 7’4 Lib-*OWZFJ an?" fifwgmm 'W I M J4; May Are either of the unit cubes fiom the earlier problems in a principle orientation? If so, which one(s) ? 10 pts. \/[5. firfé C:\Data Files\Cou.rse DatanCEG 3013\Sp1'ing 2016\Quiz ll bb 041516.0dt 2/2 ...
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