Greenhill, G. (George), Sir, 1847-1927 · London and New York, Macmillan and Co. · leaf 405
ON OF THE STRESS The curves P^P^ and T^TT^ are drawn in fig. 87,representing to scale the radial pressure p by RP andthe circumferential tension t by RT at any radius r orOR ; and first supposing the external pressure p^ in-sensible, the equilibrium of the quadrant AR of unitlength of the tube… … Fig. 87. So also the equilibrium of a quadrant bounded ex-ternally by any intermediate radius r requires thatthe area T^R^RT should equal the difference of therectangles OP^ and OP, or the area T^PT equal therectangle NPg. Expressed in the notation of the Integral Calculus, / tdr:: ■■PoTo-pr; .(3)…
Hydrostatics
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