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 196
thesides can be made to take is the angle of repose, and its tangentis the coefficient of friction of the material. It is evident that in a granular mass there is pressure on anyplane which can be passed through it, and from § 161 it is seenthat, if the principal stresses in the mass are unequal,… … Fig. 73 Fig. 73 shows the plane upon which the direction of pressure ismost oblique (see § 165), it is necessary for equilibrium that theangle ROM shall not exceed cj>. Then sinROM=^42<sin^. P\+p2~ By rearranging the terms, the ratio between the principal pres-sures is found to be p2yi ■sin…
