Resumé

The resistances of glasses to crack initiation and crack growth are both important parameters for evaluating their mechanical performance. However, it is important to distinguish them as they refer to different mechanical phenomena. In this work, we study the difference in resistance to crack initiation and growth by determining the load required to induce indentation cracking (named crack resistance, CR) and the fracture toughness (KIc), respectively, for six oxide glasses with a wide range of CR values from as low as 0.05 N to above 100 N. These new data as well as existing literature data suggest that there is no systematic relation between CR and KIc, and as such, we conclude that these two terms should not be used interchangeably. We discuss the origin of the lacking relation by considering the competing effects of glass structure, rigidity, and atmospheric humidity on crack initiation and growth.

OriginalsprogEngelsk
Artikelnummer119946
TidsskriftJournal of Non-Crystalline Solids
Vol/bind534
Antal sider6
ISSN0022-3093
DOI
StatusUdgivet - 15 apr. 2020

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fracture strength
Crack initiation
Oxides
Fracture toughness
Crack propagation
cracks
Cracks
crack initiation
Glass
oxides
glass
Indentation
Rigidity
Atmospheric humidity
indentation
rigidity
humidity

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title = "On the relation between fracture toughness and crack resistance in oxide glasses",
abstract = "The resistances of glasses to crack initiation and crack growth are both important parameters for evaluating their mechanical performance. However, it is important to distinguish them as they refer to different mechanical phenomena. In this work, we study the difference in resistance to crack initiation and growth by determining the load required to induce indentation cracking (named crack resistance, CR) and the fracture toughness (KIc), respectively, for six oxide glasses with a wide range of CR values from as low as 0.05 N to above 100 N. These new data as well as existing literature data suggest that there is no systematic relation between CR and KIc, and as such, we conclude that these two terms should not be used interchangeably. We discuss the origin of the lacking relation by considering the competing effects of glass structure, rigidity, and atmospheric humidity on crack initiation and growth.",
author = "Theany To and Jensen, {Lars Rosgaard} and Smedskj{\ae}r, {Morten Mattrup}",
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On the relation between fracture toughness and crack resistance in oxide glasses. / To, Theany; Jensen, Lars Rosgaard; Smedskjær, Morten Mattrup.

I: Journal of Non-Crystalline Solids, Bind 534, 119946, 15.04.2020.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - On the relation between fracture toughness and crack resistance in oxide glasses

AU - To, Theany

AU - Jensen, Lars Rosgaard

AU - Smedskjær, Morten Mattrup

PY - 2020/4/15

Y1 - 2020/4/15

N2 - The resistances of glasses to crack initiation and crack growth are both important parameters for evaluating their mechanical performance. However, it is important to distinguish them as they refer to different mechanical phenomena. In this work, we study the difference in resistance to crack initiation and growth by determining the load required to induce indentation cracking (named crack resistance, CR) and the fracture toughness (KIc), respectively, for six oxide glasses with a wide range of CR values from as low as 0.05 N to above 100 N. These new data as well as existing literature data suggest that there is no systematic relation between CR and KIc, and as such, we conclude that these two terms should not be used interchangeably. We discuss the origin of the lacking relation by considering the competing effects of glass structure, rigidity, and atmospheric humidity on crack initiation and growth.

AB - The resistances of glasses to crack initiation and crack growth are both important parameters for evaluating their mechanical performance. However, it is important to distinguish them as they refer to different mechanical phenomena. In this work, we study the difference in resistance to crack initiation and growth by determining the load required to induce indentation cracking (named crack resistance, CR) and the fracture toughness (KIc), respectively, for six oxide glasses with a wide range of CR values from as low as 0.05 N to above 100 N. These new data as well as existing literature data suggest that there is no systematic relation between CR and KIc, and as such, we conclude that these two terms should not be used interchangeably. We discuss the origin of the lacking relation by considering the competing effects of glass structure, rigidity, and atmospheric humidity on crack initiation and growth.

U2 - 10.1016/j.jnoncrysol.2020.119946

DO - 10.1016/j.jnoncrysol.2020.119946

M3 - Journal article

VL - 534

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

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ER -