Page 234 - Standard Handbook Of Petroleum & Natural Gas Engineering

Strength of Materials 207

Table 2-16
Typical Properties of Glass-Fiber-Reinforced Resins [lo]

Property Polyester Phenolic Melamine
Excellent (;",,d
I 70 to "LO 2x0 (0 340
250 IO 2000 moo to noon
n n to no02 0.001 to 0 004
1 35 to 2.1 I H to 2.0
25 to 50 3 10 IO
0.5 tO 5.0
x ttl 20 24
I5 1" 311 zn to 15
in 10 40 1 i 25
to
2 to 10 '%,"ti
Mi0 LO MI20
2 IO x lo-; 1 i Ill-.'
x
1 Y 1014 VXl0"
'350 to .WJ I70 to AOII
3.8 to 6.0 Y7t<,ll.l
4.0 IO 6.11
0 01 tu 0.04 I1 14 10 ll.2:i
0.01 tO 0.05
I101 L" 1.0 0.09 10 I1 21
Slight Slight
FU'* ver) guodi
hod tioud

(text contznued from page 194)
Torsion:
J n/2(6.054 - 6.004) = 68.71 in.4

10,000 ft-lb 12 in. 6.05 in.
T83 = I ft 168.71 in.4 = psi

Effective stress:

30,000)2 + (60,000- 0)' + (30,000- 0)' + 6(10,566)']

= 55,090 psi
From Table 2-15, the yield strength for AIS1 SAE 1035, cold rolled is 67,000 psi. Thus
the factor of safety is

67800
=
SF = - 1.22
55890
For further information on this subject refer to Reference 1 and References 10-14.