mos2-150817134311-lva1-app6892
DESCRIPTION
mosTRANSCRIPT
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TORSION
A SEMINAR ON
SHREE SAD VIDYAMANDAL INSTITUTE OF
TECHNOLOGY BHARUCH
CIVIL ENGINEERING DEPARTMENT
SUB : MECHANICS OF SOLIDS
PREPARED BY
PATEL MOHAMMED ASFAK (140453106007
PATEL NIRMAL
(14045310600!
RANA SAMIR
(140453106013
RANA HETAL
(14045310601"
YADAV DIVYA
(140453106016
GUIDED BY :
ER# N#P#SONI
1$7$161
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TORSION OF CIRCULAR SHAFT
TOR%UE OR TURNING MOMENT OR T&ISTINGMOMENT :'
I )*+,-./ *2 -.- *), / 82 ,- ,.*9/,.; ).-9 - 2 ,- -,. 2#
T- ,.*9/, , .; * ,8./ )-.+ / *</2 /,. ,-, ./9 -) * 8<<; ;2 ,- , *), -. ,- *; -,.8/,*=< -/, *, -9 2/,*+ ).-9 , *>/ -) , *),#
T 9-9, -) +-8< *+,/ - , *), / +*<<2 ,-.?8 -.,8./ 9-9, -. ,/,/ 9-9,#
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T-.?8 @ ,8./ )-.+ > 2/*9,. -) *),
T @ F > "R
. : T@T-.?8 F@T8./ )-.+ S@R*2/8 -) , *),
U/, -) T-.?8(T / N#99 -. N#99
R
F
F
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ANGLE OF T&IST (
& , *), / 8=+,2 ,- T-.?8 (T-/, A- , 8.)*+ -) , *), +-9 ,- A -/,/-#
T *< AOA *, , +,. -) , *), / +*<<2
, *< -) ,/,#
AOA@ @A< -) ,/,
A< -) ,/, / 9*8.2 / .*2/*#
A
-A
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SHEAR STRESS IN SHAFT:(
& * *), / 8=+,2 ,- ?8*< *2 --/,2 +-8< - *> +-/+/2 /, , *>/ -), *), , *), / */2 ,- = / 8. ,-./-*2 *, *; -/, / , +,/- -) , *), ,./<< = /28+2#
T*, ,. / +*<<2 *. ,. / *),#
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STRENGTH OF SHAFTS
M*>/989 ,-.?8 -. -. , *), +* ,.*9/,).-9 - 8<<; ,- *-,. / +*<<2 ,., -) *),#
(* F-. -</2 +/.+8<*. *),:
M*>/989 ,-.?8 (T/ / =; :
. D @ 2/*# -) , *),
@*. ,. / , *),
3
16 DT ××= τ
π
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(B )-. -<<- +/.+8<*. *),
9*>/989 ,-.?8 (, / / =;#
&. 2@ -8,. 2/* -) *), 2@/. 2/* -) *),#
D
d DT
44
16
−××= τ
π
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ASSUMPTION IN THE THEORY OF TORSION:
T )-<<-/ *89,/- *. 9*2 /< 2/-8, *. ,. / * +/.+8<*. *), 8=+,2 ,-,-./-#
1 T 9*,./*< -) *), / 8/)-.9 ,.-8-8, ,<,#
" T ,/, *<- , *), / 8/)-.9#
3 T *), / -) 8/)-.9 +/.+8<*. +,/- ,.-8-8,, <,#
4 C.- +,/- -) , *), /+ *. <* =)-.,/, .9*/ <*/ *),. ,/,#
5 A<< .*2// /+ *. ,.*/, =)-. ,/, .9*/,.*/, *),. ,/,#
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POLLAR MOMENT OF INERTIA : (
T 9-9, -) /.,/* -) * <* *.* /,.+, ,- * *>/ .2/+8<*. ,- , <* -), 8. / +*<<2 -<*. 9-9, -) /.,/*#
A . , .2/+8<*. *>/ ,-.9#
J I I I YY XX ZZ
=+=
44
6464 D D ×+×=
π π
4
32 D J ×=
π
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THEORY OF TORSION AND TORSION E%UATION
C-/2. * *), >2 *, - 2 8=+,2,- ,-.?8 *, , -,. 2#
L, T@ T-.?8
<@ <, -) , *),
R@R*2/8 -) , *),
A * .8<, -) ,-.?8 .; +.-'+,/- -), *), /<< = 8=+,2 ,- *. ,.#
L/ CA - , 8.)*+ -) , *), /<< =2)-.9 ,- CA *2 OA ,- OA * - /
8.# L, ACA@*. ,.*/
AOA@*< -) ,/,
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TORSION RIGIDITY
L, ,/,/ 9-9, P.-28+ * ,/, .*2/* /<, L#
)-. / *), , ,/, / ,.)-. .--.,/-*<,- , ,/,/ 9-9, T#
I * =*9 , =2/ 9-9, .-28+2+,/- / , *9 9*. * ,-.?8 .-28+
* ,/, / *), # T ?8*,/,; C ,*2 )-. , ,-.?8 .?8/.2 ,-
.-28+ * ,/, -) 1 .*2/* . 8/, -) , *),#
T ?8*,/,; C +-..-2/ ,- * /9/<*. EI /
>./- )-. 2+,/- -) =*9 EI / - *
L
C
J
T θ .
=
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EJAMPLE FOR SHAFT
EJAMPLE 1:' C*<+8<*, 2/*9,. -) *), ,- ,.*9/, 10 K& *, * 2
-) 15 H# T 9*>/989 *. ,. -8<2 -, >+2 609*#
P @ 10
N @ 15 H @ 15 +;+<$+ @ 15 > 60 .9
@ !00 .9
@ 60 M*
60
T N2P π
=
60
T90021010
3 ××=×
π
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T @ 106#10 N#9
-
D @ "0#0 99
3
16T D××= τ
π
33
60161010.106 D××=×
π
0.90063= D
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EJAMPLE ":'
A *), -) 60 99 2/*9,. .-,*, /, 10 .9# I).9//=< *. ,. / 100 M* 2 ,-.?8 *2 -./ K&#
S-<8,/-:'
D @ 60 99
N @ 10.9
@ 100 M*
3D16
××= τ π
T
360100
16××=
π
T @ 4"40 N#99
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N-
@ 7!!""#11*,,
P @ 7!#!" K
60
42401802P
××=
π
60
T N2P
π =
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EJAMPLE NO:' 3
E>,.*< *2 /,.*< 2/*9,. -) * .-<<. *),*. 40099 *2 "0099 .+,/<;# F/2 9*>/989 *.,. 2<-2 / , +.- +,/- * ,/,/9-9, -) 50#M / *</2# T* 9-28<8 -) .//2/,;
#/) * -) *), / 49*<- 2 ,/,/
*< -) *),#
S-<8,/-:
D @ 40099
D @ "0099 T @ 50 KN#9
L @ 49
23 N/mm108.0C ×=
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N-
@ 0#00106 .*2/*
D
d DT
44
16
−××= τ
π
400
200400
161050
446 −
××=× τ π
2 N/mm24.4=τ
l
C θ τ =
R
mm D
R 2002
400
2===
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EJAMPLE'4 :'
C*<+8<*, , 2/*9,. -) , *), .?8/.2 ,- ,.*9/,45 *, 1"0 .9# T 9*>/989 ,-.?8 / </<; ,- >+2, 9* =; 30 )-. * 9*>/989 .9//=< *. ,.-) 55 #C*<+8<*, *<- , *< -) ,/, )-. * <,-) "9 #
S-<8,/- :P @ 45 K
N @ 1"0.9
@ 55
2 N/mm
2 N/mm
60
12021045 3 T ××
=×π
60
T N2P
××
=
π
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T @350#! N#9
@ 1#30 > 350#!
@ 4655#" N#9
@ 4655" N#99
D @ 75#54 99
minmax T30.1T ×=
3355
16104655.28 D××=×
π
3
max D
16T ××= τ
π
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N- 8/ , .<*,/-
@ 0#0364 .*2/*
l
C θ τ =
R
77.37
55
2000
10803
=×× θ
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EJAMPLE 5 :'
A *), * ,- ,.*9/, 105 -. *, 160 .9# I)
, *. ,. / -, ,- >+2 , ,/,/ * <, -) 3#5 9 98, -, ,- >+2 1 2.# F/28/,*=< 2/*9,.# T*
P @ 105
N @ 160 .9
@
L @ 3500 99
N-
2 N/mm65
N.mm106266.72T 3
×=
2
N/mm65
24 N/mm108G ×=
60
T N2P
π =
60
T160210105
3 ××=×
π
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1 F-. ,.,
D @ 7#! 99
N.mm106266.72T 3
×=
3D
16××= τ
π T
3365
161072.6266 D××=×
π
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" F-. ,/Q
N-
D @ 11"#55 99
l
θ C
J
T=
3500
0174.0108
J
1072.626643××
=×
46mm1015.756J ×=
4
D32
J ×=
π
46
321015.756 D×=×
π
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EJAMOLE 6 :'
A -</2 *), ABC / >2 *, A *2 ). *, C *2 ,-.?8 -) !00 N#9 /*</2 *, B# T <, -) BC / "9 *2 ,*, -) BC / 19# T2/*9,. -) AB / 4099 *2 ,*, -) BC / "099# I) , *), /9*2 8 -) *9 9*,./*< 2 , *< -) ,/,; / .*2/8 *, ,). 2 C#
S-<8,/- :
A . / 2*,*
,/, /<< -++8. / , *), AB *2 ,. /<< = .- ,/, / *), BC#
T ,-.?8 /<< *+, -<; - *., AB#
N.mm10900T
mm1000
mm2000
mm20d
mm40d
3
B
2
1
2
1
×=
=
=
=
=
l
l
N.mm10600T 3×=
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& - ,*,
@ 0#0!6 .*2/* ,/, *, *., B#
l
θ C
J
T=
46
4
mm10251.0
4032
J
×=
×=π
2000
1080
10251.0
109003
6
3θ ××
=
×
×
radians0896.0== C B θ θ
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SHAFT COUPLING
& <, -) *), .?8/.2 / .; <*. 28 ,- -**/<*=/</,; -) * /< *), -) .?8/.2 <, /, =+-9+*.; ,- +-+, ,- *), ,-,.# T/ / 88*<<;2- =; 9* -) *2 +-8</ * - =<-
T * -) ,- *), *. -/2 ,-,. =; =-<, 8, -../, *2 , ,-.?8 / , ,.*)..2 ).-9 - *), ,-*-,. ,.-8 , +-8</#
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A , ,-.?8 / ,.*)..2 ,.-8 , =-<, /<< =8=+,2 ,- *. ,.# A , 2/*9,. -) =-<, / 9*<<
* +-9*.2 ,- , 2/*9,. -) , * ,.)-. *.,. / *892 ,- = 8/)-.9 / , =-<,#
1 D/ -) =-<, :
& - ,*, ,-.?8 ,.*9/,,2 =; , *),
&. @ *. ,. / *),
2 @ 2/*9,. -) *),
N-
T-.?8 .,2 =; - =-<,
@ ( *.* > *. ,. > .*2/8 -) =-<, +/.+<
3
D16T ××= τ
π
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&.
,-,*< ,-.?8 ./,2 =; =-<,
'''''''''''''' ("
F.-9 ?8*,/- (1 *2 ("
Ddb4
2
Ddb
4
R db4
2
b2
b2
×××=
×××=
×××=
bτ
π
τ
π
τ π
Ddbn b2
××××= τ τ
Ddb8
nd16
b23
××××=×× τ π
τ π
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DESIGN OF KEYS
A * / *,,*+2 ,- , *), =; 9* -) * ;# A.+,*< -,+ / +8, - , +/.+89).+ -) , *), *2* /9/<*. -,+ / +8, - , /. /2 -) , *# T* / , <*+2 -. , *), / 8+ * *; ,*, ,,- -,+ ).-9 * .+,*8<*. -<# A .+,*8<*. ; /, /.,2 / ,- , -< *2 , * / */2 ,- =;2 ,- , *),#
T-.?8 / ,.*9/,,2 =; , *), ,- * ,.-8, ;# K; / 8=+,2 ,- , *. ,.#
KEY
SHAFTFLANGE
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EJAMPLE OF KEYS
EJAMPLE '7:' A *2 +-8</ +-+,/ ,- <, -) -</2
+/.+8<*. *), * 6 - -) "0 99 2/*9,. =-<, ?8*<<;*+2 *<- * /,+ +/.+< -) "40 99 2/*9,.# D,.9/, *), /) , *.* *. ,. / , =-<, / ,- = ,
*9 * 9*>/989 *. ,. / , *),#S-<8,/- :
@ 6 N-
2 @ "0 99
D @ "40 99
& - ,*,
T-.?8 ,.*9/,,2 =; *), @ T-.?8 ./,2 =; =-<,
τ τ =b
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N-
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EJAMPLE ' :' T *), *+ -) 100 99 2/*9,. *. ,- = +-+,2 ,- ,2 =; * =-<,2 +-8</# I) , 9*>/989 *. ,. / , *), / 0M* *2 / , =-<, / 70 M* 2 , 89=. -) "0 99 2/*9,.=-<, .?8/.2 )-. , +-8</# T* 2/*9,. -) =-<, +/.+< * "00 99#
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EJAMPLE OF DESIGN OF SHAFT
EJAMPLE ! :'
A *), 100 / 2/*9,. / ,.*9/,,2 ,-.?8 -) 6000N#9 =; 9* -) ; "00 99 <- *2 "5 99 /2# F/2, ,. 2<-2 / *),#
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E>*9< '10 :'
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TORSION VEDIO
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TH ANK YOU