Structural mechanics; comprising the strength and resistance of materials and elements of structural design (1905)
Greene, Charles E. (Charles Ezra), 1842-1903, Greene, Albert Emerson. [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 192
e principal unit stresses, p\ and pz. If pi and p2 were known, and p and ft were then to be foundfrom the former, the construction shown in Fig. 67 would bemade, in which O M = 0 M = i(pi+p2) and MR=MR= \(p\—p2)> If one of these normals were revolved around Oto coincide with the other, the point… … Fig. 67 normal to that plane, and O R the unit stress p in magnitudeand actual direction of action on A B. OR represents eithertension or compression, as the case may be. Now let the planeon which ft acts, together with its normal and ft itself in its relativeposition, be revolved about O until it…
