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Proceedings Paper

Slow crack growth study of polycrystalline alumina and multispectral zinc sulfide
Author(s): Lee R. Cambrea; Daniel C. Harris; Steven M. Goodrich; Mark Parish; Marina R. Pascucci
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Paper Abstract

Samples of fine-grain, transparent polycrystalline alumina (CeraNova Corp) and multispectral zinc sulfide (Cleartran) were tested to determine mechanical strength and slow crack growth parameters. Mechanical strength measurements of coupons were fit to a Weibull equation that describes the material strength and its distribution. Slow crack growth parameters were calculated using the procedure set forth by Weiderhorn.1 This paper describes the derivation of Weibull and slow crack growth parameters from strength measurements over a range of stress rates and how these parameters are used to predict window lifetime under stress. Proof testing is employed to ensure that a window begins its life with a known, minimum strength.

Paper Details

Date Published: 3 May 2017
PDF: 15 pages
Proc. SPIE 10179, Window and Dome Technologies and Materials XV, 101790A (3 May 2017); doi: 10.1117/12.2261102
Show Author Affiliations
Lee R. Cambrea, Naval Air Warfare Ctr. Weapons Div. (United States)
Daniel C. Harris, Naval Air Warfare Ctr. Weapons Div. (United States)
Steven M. Goodrich, Univ. of Dayton Research Institute (United States)
Mark Parish, CeraNova Corp. (United States)
Marina R. Pascucci, CeraNova Corp. (United States)

Published in SPIE Proceedings Vol. 10179:
Window and Dome Technologies and Materials XV
Brian J. Zelinski, Editor(s)

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