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Effect of Loading Rate and Surface Conditions on the Flexural Strength of Borosilicate Glass
Author(s) -
Nie Xu,
Chen Weig W.,
Wereszczak Andrew A.,
Templeton Douglas W.
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03019.x
Subject(s) - borosilicate glass , flexural strength , materials science , composite material , quasistatic process , scanning electron microscope , three point flexural test , bending , bar (unit) , geology , oceanography , physics , quantum mechanics
This study evaluates the loading rate and surface condition dependence of the flexural strength of a borosilicate glass. The glass specimens are subjected to three different surface treatments before four‐point bending tests to study the effect of surface flaws. Quasistatic (Material Test System 810) and dynamic (Kolsky bar) experiments are performed at loading rates ranging from 0.7 to 4 × 10 6 MPa/s. The results show that the flexural strength of the borosilicate glass has a strong dependence on the loading rate. A chemically etched surface produces an enhanced flexural strength by about an order of magnitude. Scanning electron microscopy images on fracture surfaces indicate that the failure is governed by different types of flaws under different surface treatment conditions. Edge failure is also identified for samples possessing high flexural strength.