PracticeTest1.3

PracticeTest1.3 - NE497B TEST 1 February 16, 2004 Name:...

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Unformatted text preview: NE497B TEST 1 February 16, 2004 Name: Problem 1: Cable B‘D has a breaking strength of2Q kipe, and the pin A has a diameter of 3’8 in. and is made of steel with an ultimate shearng stress of 50 1:31. 3) Determine the force on cable BI). b) Determine the force 011 pin A. (3} Calculate the safety factor of the cable. (“1) Calculate the shear stress on the pin} 6) Calculate the safety factor on the pin. éjj-QZ‘MA {:0 $056,? 4°§§0ax'20/h + aglhrool /6J’n- 3'23"]: 5? { {azwizm (W) 5 {5.67) Aw I 20 aura 1- fé {Info "I J} r x‘fi/J Z'Fy': o 9 SW + (fxé‘LfUKcn 5’0')— 3~2r4‘)/J’= O ’-‘> 77,4754'llk? FA : [Maggi—r0.ka {Betti/«El T7. _ 1:0 Aer; f e) Ff 511k“ :3 NE497B TEST 1 February 16, 2004 Name: Problem 2: A steel railroad rail (E = 29 x 105 psm = 6.5 x 10'6/OF) is 39 ft. long at a temperature of 30 0P (TM) . Calculate: a) the elongation at 125 0F, b) the normal stress if the rails are welded together and cannot elongate, C) the factor of safety for failure if the the ultimate stress is 60 ksi, d) the factor of safety for bending out of line, if the buckling stress is 10 ksi, e) the normal stress if there is a 1/1 in. gap between rails. a} 5’: “(CF—“Trfif’) =37 at :7 LXKT—TRJ) / ,_ _ / ,_. 2 3” J c” 3"? X 6:.SXIQ (#(,~2J“'F -30'F'): 0.021% ‘— ’F .17) 1' EE, 1;- :(2?):loafdfj(g_f;/om!)(/2Jr-30) 6 =’ /7-T,(103F\Il :- {/7'3/nf5 C) :- 69 11f; : 3.33 [7“?161} dl‘) F515 /0 l4; ,: 0_§§'? )7-71'6; L.— I e) 0’2»? : 0267-021": 0 057 I; J E 5M g mm; 39" NE497B TEST 1 February 16, 2004 Name: Problem 3: The rod shown in the figure is supported at the two immovable ends. The cross sectional area of the rod is 2 mg, a = 6 in, and b = E2 in. The applied forces are P1 : ZOKNandP2=4O kN. ' ' a) How many equations of statics relating the forces at A and D can you obtain? b) Obtain the equations of statics relating the forces at A and D. c) Determine the force on segments AB, BC and CD. d) Find the relationship of the deformation of segments AB, BC and CD. 6) Calculate the forces at A and D. A+D~ZO£M+LM£N¢O =9 Ant-)5: _Zo,é/\/ A GJ-iéljl—fivadr—AB 55*“ ‘0 ‘5 20144} a a: I 4:- ;— -14-1'26klx} Anal/'fiiafic Fisfiw'ww o 7 ilk—H] J \ 70‘5") “MM! +A..zoL/v +V0iN‘0 z) Wag» ED 4 i oi) JA3 + else “*Jcb ‘7 6 fie“ +,f§£_!’_+ FLberfi-o A£ 4’? 146 q FAB + 5&6 +1 affix FAB-k- Zfbc ‘F Fat) 1 O a) »A+2(~A+20)'A“w “:0 -A—244L/O—A‘Z": a M A-«l-b :HZOZCN ‘9 5-2ré")! ...
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PracticeTest1.3 - NE497B TEST 1 February 16, 2004 Name:...

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