Effect of Step Size in Incremental Loading Tests on Glass Specimens

Autor:	R. E. Mould, M. W. Davis
Rok vydání:	2006
Předmět:	Materials science business.industry Linear elasticity Materials Chemistry Ceramics and Composites Forensic engineering Fracture (geology) Fracture mechanics Structural engineering business Linear elastic fracture mechanics Incremental test Stress level
Zdroj:	Journal of the American Ceramic Society. 67:43-48
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1151-2916.1984.tb19145.x
Popis:	When incremental loading tests are used to determine the strength of glass, preexisting flaws can grow subcritically during the loading history prior to the stress level, causing failure. Calculations have been performed using linear elastic fracture mechanics (LEFM) to predict the effect of the step size on the strength value obtained in such an incremental test. The theory showed step size to have a small, predictable effect on the average strength values determined by an incremental test. The results obtained permit taking this effect into consideration when utilizing such tests. Experimental verification of the theoretical approach was obtained by predicting and measuring the time-to-failure during the final load increment at which fracture occurred on actual tests.
Databáze:	OpenAIRE
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