Cyclopedia of architecture, carpentry, and building : a general reference work . 3 - ^ w ^ s I S Hot; <! C3 I W *^ ^ o o -a 2; ? - e w-g g w ~ ? « 11 O ^ M 3 53 g; cS pLi ^ 0) ,;. QI U oil--Joog in fH ^ 2 ** PQ gW - a ^ ^^ o |i- C o w =« < t °?J = ^ 0, J Ph « ^ £<^ -^ £ O 5to t^Q Oo H STEENGTII OF MATERIALS 113 materials. We sliall now consider principally the domjittlon ofrods, def ection of bed III s^ and twist of shaft i<. 95. Coefficient of Elasticity. According to Ilookes Law(Art. 1), p. 7), the elongations of a rod subjected to an increasingpull are ])roportional to the pull,
Cyclopedia of architecture, carpentry, and building : a general reference work . 3 - ^ w ^ s I S Hot; <! C3 I W *^ ^ o o -a 2; ? - e w-g g w ~ ? « 11 O ^ M 3 53 g; cS pLi ^ 0) ,;. QI U oil--Joog in fH ^ 2 ** PQ gW - a ^ ^^ o |i- C o w =« < t °?J = ^ 0, J Ph « ^ £<^ -^ £ O 5to t^Q Oo H STEENGTII OF MATERIALS 113 materials. We sliall now consider principally the domjittlon ofrods, def ection of bed III s^ and twist of shaft i<. 95. Coefficient of Elasticity. According to Ilookes Law(Art. 1), p. 7), the elongations of a rod subjected to an increasingpull are ])roportional to the pull, provided that the stresses due tothe pull do not exceed the elastic limit of the material. Withinthe elastic limit, then, the ratio of the pull and the elongation isconstant; hence the ratio of the unit-stress (due to the pull) to theunit-eloncration is also constant. This last-named ratio is called*? coetHcient of elasticity. If E denotes this coetlicient, S theunit-stress, and ,v the unit-deformation, then E = -• (17) Coefficients of elasticity are usually expressed in pounds per square inch. The preceding remarks, delinition, and formula aP})ly also to
Size: 1160px × 2154px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, booksubjectarchitecture, booksubjectbuilding
