Torsion

Definition and stakes

Portrait of Thomas Davidson Thomas Davidson,  Chambers's Twentieth Century Dictionary 1908… (1908)

“ Torsion, tor′shun, n. act of twisting or turning a body: the force with which a thread or wire tends to return when twisted, the kind of strain produced in a bar or wire when one end is kept fixed and the other is rotated about the axis: (surg.) a method of common application for the purpose of checking arterial hæmorrhage in certain cases, by twisting the cut end of the artery.—n. ”
Source: Wikisource

Portrait of Augustus Edward Hough Love Augustus Edward Hough Love,  1911 Encyclopædia Britannica (1911)

“ The theory shows further that the resistance to torsion is very seriously diminished when there is in the surface any dent approaching to a re-entrant angle. At such a place the shearing strain tends to become infinite, and some permanent set is produced by torsion. In the case of a section of any form, the strain and stress are greatest at points on the contour, and these points are in many cases the points of the contour which are nearest to the centroid of the section. ”
Source: Wikisource

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