Abstract

ENGINEERING activity is so largely dependent on the action of cutting tools, that it is not surprising to find a very large amount of research work has been devoted to its study, and at the present time there are in England two committees actively pursuing researches in this field, in addition to private investigators. At the suggestion of the Cutting Tools Research Committee of the Institution of Mechanical Engineers, of which Sir John Dewrance is chairman, some experimental studies of a preliminary character have been made recently at University College, London, on transparent bodies subjected to the action of cutting tools, and the double refraction produced by stress has been used to measure the stress distribution in the cut material. Similar experiments have also been carried out on some glass-cutting tools used for turning and planing operations.

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