Effect of Aging on the Failure Characteristics of E-Glass Fibers


The failure strains of E-glass fibers aged in air for up to 6 months at 50 °C/80 % relative humidity were measured in ambient air and in liquid nitrogen using the two-point bending method, and were related to changes in surface morphology as characterized by optical microscopy and scanning electron microscopy. The failure strain of E-glass fibers decreased by 1.5 % per day during the first week of aging, but then more slowly (0.01% per day) over the next 6 months, with similar trends noted for fibers tested in room temperature air and in liquid nitrogen. Small droplets form on the surfaces of fibers aged within the first week and reactions between the droplets and glass create surface defects that degrade failure strains. Over longer times, calcium carbonate crystals form on the fiber surfaces.


Materials Science and Engineering


The financial support of PPG Industries Inc. is gratefully acknowledged, as is the financial support of Qingwei Wang from the China Scholarship Council. This study was funded by China Scholarship Council (Grant number 201306635001).

Keywords and Phrases

Bending (Forming); Calcium Carbonate; Drop Formation; Drops; Glass Fibers; Liquid Nitrogen; Nitrogen; Scanning Electron Microscopy; Strain; Surface Defects, Ambient Air; Calcium Carbonate Crystals; E-Glass Fibers; Failure Characteristics; Failure Strain; Fiber Surface; Small Droplets; Two-Point Bending, Fibers

International Standard Serial Number (ISSN)

0022-2461; 1573-4803

Document Type

Article - Journal

Document Version


File Type





© 2016 Springer New York LLC, All rights reserved.

Publication Date

01 Mar 2016