An introduction to projective geometry and its applications; an analytic and synthetic treatment (1905)
Emch, Arnold, b. 1871 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 249
^ A A • 5 A = - P2 \;/+fy = K say. Assuming that na and nh are normal stresses on two perpen-dicular sections, then t = o. Without loss of generality we may … also assume p = i, so that (18) and (19) become n in (20) k= °, &!=-(- where na and nb now designate the maximal and minimal normalstresses. Hence, when the stress-ellipse is known, it is not diffi-cult to construct the involution of stresses. § 58. Examples.1. A plane linear deformation is…
Geometry, Projective · Geometry, Analytic
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