1311_Mechanics Homework Mechanics of Materials Solution

1311_Mechanics Homework Mechanics of Materials Solution -...

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Unformatted text preview: PROBLEM 11.1 3%: Determine the modulus of resilience for each of the tbllowing grades of structural (a) ASTM A709 Grade 50: a, = 50 ksi (b) ASTM A913 Grade 65: 0, = 65 ksi SOLUTION (C) ASTNI A709 Grade [00: 017: 100 kSi S'hw 6+0ch she) E : 2?!!0‘ log; 19¢! all,” Hmze deaf: nix/en. (on SY = .50 ks; = so vio’ Fa} iii , LSOMO‘)‘ E (21(2‘lwlo‘) u, = r #3.: in.!L/;..’ -- (m 6v = asks: = 6910‘”.- u = £1: =____(‘55“°‘.)z " 2E tzlczquoq 72.2 MIL/in“ .- (m 6“. = I00 ks: = mono3 psi __ _ (loowo’s)z _ “ 22 ' (2K27x10‘) PROBLEM 11.2 11.2 Determine the modulus ofresilienoc fix each of the fillowiug aluminum alloys: (a) HOG-HM: E = 70 GPa, a,= 55 MPa (b) 2014-T6: E = 72 GPa a, = 220 MPa SOLUTION (c) 6061-Y6: -E = 69 GPa a, = 140 MPa Albumin um alloy S an E = 70210“ P4 , 6} = 5910‘ Pa 6-: QSS-x'O) J l n- 2 6 “I 3 u‘ *: "'. ""__ N 'M .M .. . M (b) E': 72>:qu Pa.J 6}= 22mm" Pa. 6'11 220*!0‘ 1 3 a. ; 2 = = " T 3 / u‘ U! E W 336*“) N tan/m 3C LT m (e) E = aqua“ P4, 6r = Hexlo‘Pa. z _ E3: HOND‘) :: 142.0 210: Nan/m5 = ”2-0 luv/""3 ‘ ”T E ‘ (2mm no") ...
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