Reliability of the Chevron-notch technique for fracture toughness determination in glass.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F03%3A07033010" target="_blank" >RIV/68081723:_____/03:07033010 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Reliability of the Chevron-notch technique for fracture toughness determination in glass.

Popis výsledku v původním jazyce

The applicability of the chevron-notch (CN) three-point bending test for determining the fracture toughness (KIc) of borosilicate glass was studied. As-received specimens with straight sharp notch were also tested in three-point bending for comparison purposes. It was found that both chevron and straight notched specimen geometries were equally suitable for the determination of fracture toughness in terms of average values and data variability according to Weibull and Student's t -statistics. Further testing with CN geometry showed that annealing of specimens at a temperature (550 8C) higher than the glass transformation temperature led to a lower value of KIc. The difference in mean fracture toughness values (0.75 and 0.64 MPam1/2 before and after annealing, respectively), was ascribed to the different level of compressive residual stresses in the samples. The Student's t -test was applied to confirm the statistical significance of the different KIc values measured. These results demo

Název v anglickém jazyce

Reliability of the Chevron-notch technique for fracture toughness determination in glass.

Popis výsledku anglicky

The applicability of the chevron-notch (CN) three-point bending test for determining the fracture toughness (KIc) of borosilicate glass was studied. As-received specimens with straight sharp notch were also tested in three-point bending for comparison purposes. It was found that both chevron and straight notched specimen geometries were equally suitable for the determination of fracture toughness in terms of average values and data variability according to Weibull and Student's t -statistics. Further testing with CN geometry showed that annealing of specimens at a temperature (550 8C) higher than the glass transformation temperature led to a lower value of KIc. The difference in mean fracture toughness values (0.75 and 0.64 MPam1/2 before and after annealing, respectively), was ascribed to the different level of compressive residual stresses in the samples. The Student's t -test was applied to confirm the statistical significance of the different KIc values measured. These results demo

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

<a href="/cs/project/IAA2041003" target="_blank" >IAA2041003: Mikromechanika křehkého lomu a statistické modely</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Science and Engineering A. Elsevier

ISSN

0921-5093

e-ISSN

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Svazek periodika

347

Číslo periodika v rámci svazku

1/2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

102-108

Kód UT WoS článku

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EID výsledku v databázi Scopus

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