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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
Volume
1
ISBN electronic:
978-1-62708-214-3
Publication date:
1992
Book Chapter

Delayed Fracture of Tempered Glass Panels Due to Nickel Sulfide Inclusions

By
Roland Huet
Roland Huet
Failure Analysis Associates, Inc.
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;
Joel M. Wolf
Joel M. Wolf
Failure Analysis Associates, Inc.
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;
Piotr D. Moncarz
Piotr D. Moncarz
Failure Analysis Associates, Inc.
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Published:
1992
Page range:
431 - 433

Abstract

The spontaneous breakage of tempered glass spandrel panels used to cover concrete wall panels on building facades was investigated. Between January 1988 and August 1990, 19 panel failures were recorded. The tinted panels were coated on their exterior surfaces with a reflective metal oxide and covered on the back surfaces with an adherent black polyethylene plastic. Macro fractography, SEM fractography, EDX analysis, and photo elasticimetry were conducted on four of the shattered panels. Small nickel sulfide inclusions were found at the failure origins. Failure of the panels was attributed to growth of the inclusions, coupled with high residual stresses. Fracture mechanics analysis showed that the residual stresses alone were high enough to cause fracture of the glass, with a flaw of the size observed.

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Roland Huet, Joel M. Wolf, Piotr D. Moncarz, 1992. "Delayed Fracture of Tempered Glass Panels Due to Nickel Sulfide Inclusions", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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