The elasticity and resistance of the materials of engineering (1883)
Burr, William H. (William Hubert), 1851-1934 · New York, J. Wiley & sons · leaf 55
IES. [Art. 8. The expression for -^—7 will be composed of the sum of two parts. In Fig. 2, ab is the original position of r dip, and afterthe strain rf exists it takes the position ec. Consequently ac (equal and parallel to bd and perpendicularto ak) represents the strain 7;, while cd rep-resents… … = -J- 4- ^r dip r eot tp In Fig. 2, the points a, b and k are iden-tical with the points similarly lettered in Fig. i. The expres- dusion for ■— may be at once written from Fig. i. There may, CI M then, finally be written : , dwdx drf Tf tan ip r dip . du doD and, -r-, = r— dz r eos ip dq) These…
Strength of materials · Building materials
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-271-175.webp)
