Torsional Strength of Glass Under Hydrostatic Pressure

[+] Author and Article Information
M. Sakata, S. Aoki

Department of Physical Engineering, Tokyo Institute of Technology, Tokyo, Japan

J. Eng. Mater. Technol 95(2), 83-86 (Apr 01, 1973) (4 pages) doi:10.1115/1.3443136 History: Received May 12, 1972; Online August 17, 2010


Solid and hollow cylinders of Pyrex glass were twisted under hydrostatic pressure up to 1000 kg/cm2 . The torsional strength of specimens coated with thin rubber films was increased by superposed hydrostatic pressure, while that of naked specimens remained constant. It is shown that rupture commences at a surface flaw and that the effect of hydrostatic pressure on the torsional strength of glass may be explained on the basis that fracture occurs when a critical stress-intensity factor is reached at a part-through surface crack.

Copyright © 1973 by ASME
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