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Unformatted text preview: CEng ’ 00 2/ w . 2,1 ’ Twe gage marks are placed exactly 250 mm apart on a A12~mmv '
diameter alurmnum rod. Knowing that, with an ax'ial load of 6000 N acting on the rod, the distance between the gage marks is 250,18 mm, determine the I
modulus of elastigity of the aluminum used in the rod. ' get/em L: 250mm, 8: 2W*I€»1$”D:0~)a~mm $5: é, 3 O‘igrov7&><’0 L 36”
’ w 5000 (N) g
I 9am P:5oooC/\O, Trllﬁmm) 3 0: .11: L r A WY], W’Xﬁx1040n2) : 53cm) over/0'3 2.4 A 28ft lengthof V0.25—in.diam¢t¢r gt‘eél wire’i'sixt, he used in a ’
hanger. It is noted that the wire stretches 0.45 in. when a tensile fbrce P is ap (
plied. Knowing that EU: 29 X 10‘? psi, determinerazg)»thevrmagnitude of the force P, (b) the 'cenespunﬁirig: merit1&1 massin the wire. ‘ I a ﬂuven Lima] gmMm @5; M 7/,33mr3
imam)
, * .0 rip; L
i 3mm, aimgem) .394; ﬁxaarxlaw} : 4’ “m " D g P . 3
 j , a
’ A138,“,— 4m9xx)o“2[th1] x)»33’></o 2.5 A control rod made of yellow brass must not stretch more than 3 mm
when the tension in thewire is 4 kN. Knowing that E = 105 GM and that the
maximum allowable normal stress is 180 MPa, determine (a) the smallest I
diameter thai can be selected for the rod, (1)) the corresponding maximum Length
of the. rod: F " “SM/an PC4ZN/ gmxi§ﬁmm3 / E:/OS—C<I\PQ) 4¢mmx3 IQD’CMPQD ' DQQjVL baht” OvMAK 3 1)
(reg—mm e L < “(95” “j / rxmowoé/N/mz} 7777’ 515 mm: 2 bexro”3€m 3. W {01mm : S’SLCMM 3‘ m . Dewy» {AYE 6mcxxﬂwkenaww‘may) ,1 c] x ,N‘. . ,3 . I. l. m
S<8~W r?  é 3x10 cm) 47w Lé/DDWVC MW)
5 HM ><'/06[N/m1}  r”.—
@Mﬂ 2.9 A block of 250.mm length and 50 X 40mm cross 's'ection'ié to sup
POIT a centric compressive load P. The material to be uSed is a bronze for which
E = 95 GPa. Determine the largest load which can be applied, knowing that
thelnonlnal stress must riot exceed 80 MPa and that the decrease in length of
the’blbck Shouldbe at most 0.12% 'of its original length; 'rflo'l/evv 1,:23‘OCMM3/ A, . Degcjm wYﬁ" Wm“
,4 6 ’3‘ "3. .3:
Uvg km 7:7 .EMi‘éKgﬁOCM/ﬁa) ~23; P§ Elmo [ﬁTyl/Hx/o (m) W LL /? < leééélém »Ee;53n W'YE gmmx
‘ ’ / ﬂ
*~> Cl" L é. 5mm :5 g o comm/Z
gégmax M E, Ana ,3 v 7
p g o'omxmm (mljxcisx/og at Pg 228C214) “(2) ...
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 Fall '09
 MOORTHY

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