MCD-6.30.2016-10Q - SECTitle MCD-6.30.2016-10Q Created Date 20160902000000Z
Formulae and Charts for MCD
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Transcript of Formulae and Charts for MCD
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FORMULAE:
Centroid
Bolts and Fasteners
Power screw:
raise lower
collar
positive torque
efficiency
Torque require for preload generation: T = KFid
Static load factor: or if guarding against joint separation
Fp = AtSp
Fatigue loading:
Safety factor: fatigue failure or yielding
Shearing:
=
++++++++
=
n
i
n
ii
A
xA
AAAAAxAxAxAxAxAx
1
1
54321
55443312211
=
n
i
n
ii
A
yAy
1
1
...rrrrMF
CBA
n"n +++= 222
1
nV'F =
tt
iba A
CPA
FF22
=
=t
i
tt
iam A
FA
CPAF
+=+=2
a
aSn
=am
y
max
y SSn +
==
+=
Ld)dL(
2FdT
m
mm
+
=Ld
)Ld(2
FdTm
mm
tanorLdm >>
2dFT ccc
=
T2FL
TTe 0
==
( )( )[ ]cm .sectansectan
dd
6250
12+
+
CPFAS
n itp
= )C(PFn i
=1
-
Welding
Butt weld: tension shear
Fillet weld in shear: (safety factor)
Welding - torsion: J = 0.707hJu
Welding - bending: I = 0.707hIu
(safety factor)
Spring
Compression spring:
Deflection:
Extension spring:
AV' =
JMr'' =
AV' =
IMc
==
ysysy S.Swhere
Sn 5770==
3
8dFDK
=C
CKs 212 +
=3424
+
=CCK B
NDGdk 3
4
8=
[ ]23416dd
D)K(F AA += 3
8dFD)K( BB
=
drC
CC)K(
drC
)C(CCC)K(
B
A
22
2
2
11
11
12
1
24414
214
14
=
=
=
=
)dN 1 - (2C 1)d (N d)- 2(D L bb0 +=++=
==
alloys nonferrous and steel stainless austenitic 350
steelalloy low and carbon temperedand hardened 500
steelcarbon drawn -cold450
ut
ut
ut
allsy
S.
S.
S.
S
hlF
=hlF
=
hlF.
hl.F 4141
7070==
ys.n
50=
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Critical deflection: (for steel)
Fatigue loading:
Critical frequency:
Maximum tensile strength:
Yield strength:
Bearing
Roller contact bearings:
a = 3 for ball bearings
10/3 for roller bearings
for roller bearings
Equivalent radial force:
roller bearings
[ ]21
0 22 /
EG)GE(DL
+