The elasticity and resistance of the materials of engineering (1883)
Burr, William H. (William Hubert), 1851-1934 · New York, J. Wiley & sons · leaf 30
nentswill be represented in the usual manner, i.c,^ p^y signifies atangential intensity ona plane normal to theaxis of X (plane ^F),whose direction is paral-lel to the axis of F,while pxx signifies theintensity of a normalstress on a plane nor-mal to the axis of X(plane ZY^ and in thedirection of… … Fig.l 5 = E 2(1 + r) q) — Gq) (I) Now when the material is subjected to stress the linesbounding the faces of the parallelepiped will no longer be atright angles to each other. It has already been shown in Art.2 that the angular changes of the lines, from right angles, arethe characteristic…
Strength of materials · Building materials
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