Unformatted text preview: 3.91 A 25 Nm torque is applied to the stepped shaft shown which has a full
quartercircular ﬁllet. Knowing that D = 24 mm, determine the maximum shearing
stress in the shaft when (a) d =20 mm, (b) d= 2.1mm. PROBLEM 3.91 SOLUTION 2mm = *= 0. It) Fm" F; 3.37. K= LS4
3 Full quarter—circular ﬁllet
extendstoedge oflnrgershuft For Smajie» sharp'l’ {‘= £a’ ,_ 0.. O“) m e (21Cl34M251 r 2:,3xto‘ Pa: 2L6 MPcLI
“(0.00) =_L_2._
ﬁ 11.5““ o.o.$'$'6 FIN'"t Pi 3.51 K=I.L+2.. For snafﬂe» skaH c: A: 0.0303.“
3
z: K—TC  ZKT MczxLMKLS) = I19 Ho" 1’s» = 17.? MPG. 4  .. J 1T C3 If (0.010833 3.92 In the stepped shaﬁ shown, which has a full quartercircular ﬁllet, D = 1.5 in.
PROBLEM 392 and d — 1.2 in. Knowing that the speed of the shah is 1800 rpm and that the
allowable shearing stress is 8000 psi, determine the maximum power that may be
transmitted by the shaft. SOLUTION For Smaller SkaH Full quarter—circular ﬁllet 3
extends to edge of larger shaft Z = K TC T ._.. J2) = H 9 r
J KC 1 K 3
= 7r é’t‘sfwzmm = 2072 tittn 4?: race rpm = 30 Hz. Pom» P= 21H?T = 211(3o3CRO72) = 83.0.6x103JLin/s 330. c. No" PL in ’5 :
650° JbiM/S/hp 5.6L 2 5'3 ...
View
Full Document
 Summer '10
 STAFF

Click to edit the document details