Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC

Machining of brittle ceramics is a challenging task because the requirements on the cutting tools are extremely high and the quality of the machined surface strongly depends on the chosen process parameters. Typically, the efficiency of a machining process increases with the depth of cut or the feed...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Masud Alam, Liang Zhao, Napat Vajragupta, Junjie Zhang, Alexander Hartmaier
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	3C-SiC Drucker–Prager model machining brittle–ductile transition roughness subsurface damage Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/411ee0fc5af34570b9add5a8f1c57e4c
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:411ee0fc5af34570b9add5a8f1c57e4c
record_format	dspace
spelling	oai:doaj.org-article:411ee0fc5af34570b9add5a8f1c57e4c2021-11-25T17:17:41ZFinite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC10.3390/cryst111112862073-4352https://doaj.org/article/411ee0fc5af34570b9add5a8f1c57e4c2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1286https://doaj.org/toc/2073-4352Machining of brittle ceramics is a challenging task because the requirements on the cutting tools are extremely high and the quality of the machined surface strongly depends on the chosen process parameters. Typically, the efficiency of a machining process increases with the depth of cut or the feed rate of the tool. However, for brittle ceramics, this easily results in very rough surfaces or even in crack formation. The transition from a smooth surface obtained for small depths of cut to a rough surface for larger depths of cut is called a brittle-to-ductile transition in machining. In this work, we investigate the mechanisms of this brittle-to-ductile transition for diamond cutting of an intrinsically brittle 3C-SiC ceramic with finite element modeling. The Drucker–Prager model has been used to describe plastic deformation of the material and the material parameters have been determined by an inverse method to match the deformation behavior of the material under nanoindentation, which is a similar loading state as the one occurring during cutting. Furthermore, a damage model has been introduced to describe material separation during the machining process and also crack initiation in subsurface regions. With this model, grooving simulations of 3C-SiC with a diamond tool have been performed and the deformation and damage mechanisms have been analyzed. Our results reveal a distinct transition between ductile and brittle cutting modes as a function of the depth of cut. The critical depth of cut for this transition is found to be independent of rake angle; however, the surface roughness strongly depends on the rake angle of the tool.Masud AlamLiang ZhaoNapat VajraguptaJunjie ZhangAlexander HartmaierMDPI AGarticle3C-SiCDrucker–Prager modelmachiningbrittle–ductile transitionroughnesssubsurface damageCrystallographyQD901-999ENCrystals, Vol 11, Iss 1286, p 1286 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	3C-SiC Drucker–Prager model machining brittle–ductile transition roughness subsurface damage Crystallography QD901-999
spellingShingle	3C-SiC Drucker–Prager model machining brittle–ductile transition roughness subsurface damage Crystallography QD901-999 Masud Alam Liang Zhao Napat Vajragupta Junjie Zhang Alexander Hartmaier Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC
description	Machining of brittle ceramics is a challenging task because the requirements on the cutting tools are extremely high and the quality of the machined surface strongly depends on the chosen process parameters. Typically, the efficiency of a machining process increases with the depth of cut or the feed rate of the tool. However, for brittle ceramics, this easily results in very rough surfaces or even in crack formation. The transition from a smooth surface obtained for small depths of cut to a rough surface for larger depths of cut is called a brittle-to-ductile transition in machining. In this work, we investigate the mechanisms of this brittle-to-ductile transition for diamond cutting of an intrinsically brittle 3C-SiC ceramic with finite element modeling. The Drucker–Prager model has been used to describe plastic deformation of the material and the material parameters have been determined by an inverse method to match the deformation behavior of the material under nanoindentation, which is a similar loading state as the one occurring during cutting. Furthermore, a damage model has been introduced to describe material separation during the machining process and also crack initiation in subsurface regions. With this model, grooving simulations of 3C-SiC with a diamond tool have been performed and the deformation and damage mechanisms have been analyzed. Our results reveal a distinct transition between ductile and brittle cutting modes as a function of the depth of cut. The critical depth of cut for this transition is found to be independent of rake angle; however, the surface roughness strongly depends on the rake angle of the tool.
format	article
author	Masud Alam Liang Zhao Napat Vajragupta Junjie Zhang Alexander Hartmaier
author_facet	Masud Alam Liang Zhao Napat Vajragupta Junjie Zhang Alexander Hartmaier
author_sort	Masud Alam
title	Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC
title_short	Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC
title_full	Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC
title_fullStr	Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC
title_full_unstemmed	Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC
title_sort	finite element modeling of brittle and ductile modes in cutting of 3c-sic
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/411ee0fc5af34570b9add5a8f1c57e4c
work_keys_str_mv	AT masudalam finiteelementmodelingofbrittleandductilemodesincuttingof3csic AT liangzhao finiteelementmodelingofbrittleandductilemodesincuttingof3csic AT napatvajragupta finiteelementmodelingofbrittleandductilemodesincuttingof3csic AT junjiezhang finiteelementmodelingofbrittleandductilemodesincuttingof3csic AT alexanderhartmaier finiteelementmodelingofbrittleandductilemodesincuttingof3csic
_version_	1718412525192609792

Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC

Ejemplares similares