Phenomenon of fracture and fracture morphology of glass tested in tension flexure and torsion
Cameron, N.M.
Loading…
Permalink
https://hdl.handle.net/2142/111960
Description
Title
Phenomenon of fracture and fracture morphology of glass tested in tension flexure and torsion
Author(s)
Cameron, N.M.
Issue Date
1963-04
Keyword(s)
Fracture
Fracture Morphology
Glass
Tension
Flexure
Torsion
Abstract
A method of testing glass rods in tension and torsion was devised. Two types of glass, Pyrex and Soda-lime, were tested in tension, flexure and torsion and the data analyzed by both Normal and Weibull statistics. A significant difference in strength was found to exist between the tension and flexural techniques of testing of similar specimens of Soda-lime glass. This difference is explained by the size effect brought about by the pre-existing flaw concept.
A significant difference was also found between similar specimens of Pyrex and Soda-lime when both were tested in tension. This is explained by a difference in intrinsic strengths of the two glasses.
Explanations are put forward concerning the formation of certain fracture markings and light and electron micrographs are presented to indicate the various markings that may be observed on glass fracture surfaces.
The fact that a Griffith type equation can be used to predict the nominal stress at fracture, with the mirror being considered as the flaw, is explained, using the concepts of Irwin, by suggesting that in any one glass there is a specific strain energy release rate, Gm, associated with the mirror boundary.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
TAM R 242
1967-0538
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/111960
Sponsor(s)/Grant Number(s)
U.S. Naval Research Laboratory, Contract No. Nonr 2947 (02) (x), NRL Project 62 R05 19A, Technical Memo No. 190
Copyright and License Information
Copyright 1963 Board of Trustees of the University of Illinois
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.