International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 508
Fig. 230. the lower ones. In other words, when a cantilever is bentthrough the action of a load, the upper fibers are in tensionand the lower fibers in compression. The reverse is thecase in a simple beam in which the upper fibers are in com-pression and the lower fibers in tension. Further… … FlG. 231. ation will show that there must be a fiber, S S, which isneither lengthened nor shortened when the beam is bent,i, e., S S — S S. When the beam is straight the fiberS S\ which is neither lengthened nor shortened when thebeam is bent, is called the neutral line. There may be STRENGTH OF…
Railroad engineering
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