TU Darmstadt / ULB / TUprints

Fracture toughness determination of fused silica by cube corner indentation cracking and pillar splitting

Bruns, Sebastian ; Petho, Laszlo ; Minnert, Christian ; Michler, Johann ; Durst, Karsten (2020):
Fracture toughness determination of fused silica by cube corner indentation cracking and pillar splitting. (Publisher's Version)
In: Materials & Design, 186, Elsevier, ISSN 02641275,
DOI: 10.25534/tuprints-00011386,
[Article]

[img]
Preview
Text
Bruns.pdf
Copyright Information: CC-BY-NC-ND 4.0 International - Creative Commons, Attribution NonCommercial, NoDerivs.

Download (1MB) | Preview
Item Type: Article
Origin: Secondary publication
Status: Publisher's Version
Title: Fracture toughness determination of fused silica by cube corner indentation cracking and pillar splitting
Language: English
Abstract:

In this paper the applicability of the pillar splitting technique for fracture toughness determination on anomalous behaving bulk fused silica glass is explored. The results are compared to conventional cube corner indentation cracking analyzed using the Lawn, Evans and Marshall model (JACerS, 63 (1980) 574). The experimental analysis is supported by constitutive Finite Element Analysis with cohesive zones to determine adequate gauge factors to correlate the load instability upon splitting to the fracture toughness Kc. The role of densification on pillar splitting was critically examined.

The results show a fragmentation of the micro pillar into three parts, a failure pattern as proposed by Sebastiani et al. (Philos. Mag., 95 (2014) 1928). Therefore, the applicability of pillar splitting to (anomalous) glasses is confirmed. Cohesive zone FEA delivered the gauge factors required for fracture toughness calculation. The influence of densification on those factors, however, was found to be small for indentation cracking and negligible for pillar splitting. With the corresponding set of gauge factors fracture toughness values in good accordance with literature could be determined. Inside the SEM, moreover, electron beam irradiation has been found to enhance the fracture properties of fused silica.

Journal or Publication Title: Materials & Design
Volume of the journal: 186
Place of Publication: Darmstadt
Publisher: Elsevier
Collation: 8 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Physical Metallurgy
Date Deposited: 22 Jan 2020 07:00
Last Modified: 05 Apr 2023 11:58
DOI: 10.25534/tuprints-00011386
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-113866
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/11386
PPN:
Export:
Actions (login required)
View Item View Item