Unformatted text preview: l 1.43 The state of stress shown occurs in a machine component made of a grade
PROBLEM 1143 of steel for which a, = 65 ksi. Using the maximumdistortionencrg criterion,
determine the range of values of 0;, for which the factor of safety associated with the
yield strength is equal to or larger than 2.2. SOLUTION
x ‘3 k5;
H '5" 6;“ = ﬁ (0 4" 83 = ‘4 Its? 6561 = £19 —_ q ks;
Z 2 2
{in = I"! ksi R= 1/(6—;§*)‘+ 2’»?
=4 41+ H“ = 1454 kg. Gm: 6N:"‘ R = 18.56 ksi
6!: 1' 6;" " R ‘  l0.56 k5;
6: '' 6': :. 6' z
(GEL—6..)z + (6,,— 6;) + (64.61): = 2kg...
(1856+ I056); + (lO.5é— 63,)2 + (63 1356)" = 259% )"
847°” * ("’°5’*2‘"2 5x + @‘DWGQ‘ 37"“3 4 3W4? . :7q5'.87 263"— 166;,  441.612. = o M _ 3 ' (2m 6:} = 19.3‘? km. J — “.3? k5; —ll.3? ksf :5 63 s 161.3? ks; ih
i__.~ ...
View
Full Document
 Summer '10
 STAFF

Click to edit the document details