The Fracture Velocity of a Glass at Liquid Hydrogen Temperatures

JSGT 1951 V35 T318-T319

The limiting velocity of fracture for a soda–lime–silica glass was measured at the temperature of liquid hydrogen (20 K) and found to be 1542 m/s. This value lies on a continuation of the straight line of fracture velocity versus temperature previously reported over the range of 77–475 K. The temperature coefficient of fracture velocity is therefore approximately -0·15 m/sK over the entire range studied with no discontinuities within the experimental error.

Henry M. Dimmick