10.4 COMPOUND THICK CYLINDERS
It has been shown that the hoop stress is maximum at the inner radius and decreases towards the outer radius. Further, hoop stress is greater than that of internal fluid pressure. Thus, there is a limiting value for the internal fluid pressure as it depends on the hoop stress which in turn depends on the permissible stress of the shell material (Figure 10.2).
Fig. 10.2 Compound cylinder.
To meet the demand of cylinders to withstand high fluid pressures, some methods have to be involved to reduce the hoop stress. One such method was seen in thin cylinders is to wind strong steel wire under tension on the cylinder. ...
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