Determination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling

It is well-known that cracks are observed around the impression during indentation of brittle materials. The cracks inception depends on load conditions, material and indenter geometry. The paper aims to use experimental micro-indentation data, FE simulations with cohesive zone modelling, and an opt...

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Autores principales:	Petr Skalka, Michal Kotoul
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	micro-indentation mechanical and fracture properties identification finite element analysis optimisation analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/2386ccce74cf4110a269b759253a860f
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spelling	oai:doaj.org-article:2386ccce74cf4110a269b759253a860f2021-11-25T18:14:14ZDetermination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling10.3390/ma142268641996-1944https://doaj.org/article/2386ccce74cf4110a269b759253a860f2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6864https://doaj.org/toc/1996-1944It is well-known that cracks are observed around the impression during indentation of brittle materials. The cracks inception depends on load conditions, material and indenter geometry. The paper aims to use experimental micro-indentation data, FE simulations with cohesive zone modelling, and an optimisation procedure to determine the cohesive energy density of silicon single crystals. While previous studies available in the literature, which use cohesive zone finite element techniques for simulation of indentation cracks in brittle solids, tried to improve methods for the evaluation of material toughness from the indentation load, crack size, hardness, elastic constants, and indenter geometry, this study focuses on the evaluation of the cohesive energy density 2<i>Γ</i> from which the material toughness can be easily determined using the well-known Griffith-Irwin formula. There is no need to control the premise of the linear fracture mechanics that the cohesive zone is much shorter than the crack length. Hence, the developed approach is suitable also for short cracks for which the linear fracture mechanics premise is violated.Petr SkalkaMichal KotoulMDPI AGarticlemicro-indentationmechanical and fracture properties identificationfinite element analysisoptimisation analysisTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6864, p 6864 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	micro-indentation mechanical and fracture properties identification finite element analysis optimisation analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	micro-indentation mechanical and fracture properties identification finite element analysis optimisation analysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Petr Skalka Michal Kotoul Determination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling
description	It is well-known that cracks are observed around the impression during indentation of brittle materials. The cracks inception depends on load conditions, material and indenter geometry. The paper aims to use experimental micro-indentation data, FE simulations with cohesive zone modelling, and an optimisation procedure to determine the cohesive energy density of silicon single crystals. While previous studies available in the literature, which use cohesive zone finite element techniques for simulation of indentation cracks in brittle solids, tried to improve methods for the evaluation of material toughness from the indentation load, crack size, hardness, elastic constants, and indenter geometry, this study focuses on the evaluation of the cohesive energy density 2<i>Γ</i> from which the material toughness can be easily determined using the well-known Griffith-Irwin formula. There is no need to control the premise of the linear fracture mechanics that the cohesive zone is much shorter than the crack length. Hence, the developed approach is suitable also for short cracks for which the linear fracture mechanics premise is violated.
format	article
author	Petr Skalka Michal Kotoul
author_facet	Petr Skalka Michal Kotoul
author_sort	Petr Skalka
title	Determination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling
title_short	Determination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling
title_full	Determination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling
title_fullStr	Determination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling
title_full_unstemmed	Determination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling
title_sort	determination of mechanical and fracture properties of silicon single crystal from indentation experiments and finite element modelling
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2386ccce74cf4110a269b759253a860f
work_keys_str_mv	AT petrskalka determinationofmechanicalandfracturepropertiesofsiliconsinglecrystalfromindentationexperimentsandfiniteelementmodelling AT michalkotoul determinationofmechanicalandfracturepropertiesofsiliconsinglecrystalfromindentationexperimentsandfiniteelementmodelling
_version_	1718411424867287040

Determination of Mechanical and Fracture Properties of Silicon Single Crystal from Indentation Experiments and Finite Element Modelling

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