Accession Number:

ADA546251

Title:

Effect of Loading Rates and Surface Conditions on the Flexural Strength of Borosilicate Glass

Descriptive Note:

Journal article

Corporate Author:

ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI

Personal Author(s):

• Nie, Xu
• Chen, Weinong W.
• Wereszczak, Andrew A.
• Templeton, Douglas W.

Report Date:

2009-01-01

Pagination or Media Count:

11.0

Abstract:

This study evaluates the loading-rate and surface-condition dependence of flexural strength of a borosilicate glass. The tensile surfaces of glass bending specimens are subjected to 3 different surface treatments. Four-point bending experiments are performed on those treated samples, at loading rates ranging from 0.7 MPas to 4 106 MPas. The results show that the flexural strength of the borosilicate glass increases with increasing loading rate. When the surface is chemically etched, the flexural strength increases by an order of magnitude and fracture initiates from an edge. The high strength measured in the etched glass is still far less than the intrinsic tensile strength, indicating a flaw-determined failure.

Descriptors:

• *GLASS
• SURFACE FINISHING
• TENSILE PROPERTIES
• SILICATES
• BENDING
• FLEXURAL STRENGTH
• BORON OXIDES
• REPRINTS

Subject Categories:

• Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE