Page 146 - Shigley's Mechanical Engineering Design

bud29281_ch03_071-146.qxd 11/24/09 3:02PM Page 121 ntt 203:MHDQ196:bud29281:0073529281:bud29281_pagefiles:

Table 3–4
h
r c = r i +
Formulas for Sections 2
h
of Curved Beams h
r o r n =
r ln (r o /r i )
r n c
r i
b o h b i + 2b o
r c = r i +
3 b i + b o
e
h A
r n =
r b o − b i + [(b i r o − b o r i )/h]ln(r o /r i )
o
r
r c
b n
i r i
b 2 2
o b i c + 2b o c 1 c 2 + b o c 2
1
r c = r i +
e 2(b o c 2 + b i c 1 )
c 2
b i c 1 + b o c 2
r r n =
o
c 1 r b i ln[(r i + c 1 )/r i )] + b o ln[r o /(r i + c 1 )]
r n c
b i r i
r c = r i + R
R
e
R 2
r n =

r
2
r n c 2 r c − r − R 2
r i c
b 1 2 1 2
o h t + t (b i − t) + t o (b o − t)(h − t o /2)
i
2 2
t r c = r i +
o
t i (b i − t) + t o (b o − t) + ht
e
t
h t i (b i − t) + t o (b o − t) + ht o
r n = r i + t r o − t o r o
r o b i ln + t ln + b o ln
t i r i r i + t i r o − t o
r c r
n
b i
r i
1
b 1 h t + t (b − t) + t o (b − t)(h − t o /2)
2
2
2 2 i
t r c = r i +
o
ht + (b − t)(t i + t o )
t t
e 2 2
h (b − t)(t i + t o ) + ht
r n =
r i + t i r o r o − t o
r b ln + ln + t ln
o
r i r o − t o r i + t i
t i
r c r n
r
i
121