Experimental engineering and manual for testing. For engineers and for students in engineering laboratories (1906)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & Sons; [etc., etc.] · leaf 149
a = angle of torsion. Thena=ai — («24-a3). This angle is measured through short ranges by means of twoindex-arms clamped to the specimen, as shown at c. One armcarries a pointer which plays over an arc (d), graduated in inches,whose centre of curvature is the centre of the specimen. Thedistance… … on the scale-beam, may be found as follows (see Fig. 636): Thefixed chuck is rigidly connected to link K as shown. The tor-sion moment (Pa) on the specimen tends to rotate the chuck and link as indicated by the arrow. Theonly additional forces acting on K arethe vertical forces of strut P\ and…
Building materials · Machinery
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