Accession Number:

AD0761432

Title:

Internal Fracture of Glass under Tri-Axial Tension Induced by Thermal Shock,

Descriptive Note:

Corporate Author:

CORNELL UNIV ITHACA N Y MATERIALS SCIENCE CENTER

Personal Author(s):

Report Date:

1969-11-11

Pagination or Media Count:

35.0

Abstract:

Glass spheres were stressed internally in triaxial tension by thermal shock induced by up-quenching from 77k in liquid nitrogen to about 1000k in liquid tin to obtain rather uniform hydrostatic tension stress of about 3 x 10 to the 9th power dynesq cm. Among some 200 tested specimens, only 28, each of which contained a visible preexisting defect, were fractured. The rest showed strengths in excess of about 4.5 x 10 to the 9th power dynesq cm since no fractures nucleated either internally or at internal bubbles which concentrate the stress by a factor of 1.5. Modified author abstract

Subject Categories:

  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE