Numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite

Self-healing fiber-reinforced ceramic (shFRC) is a new functional material. When a microcrack propagates in this material, self-healing occurs owing to high-temperature oxidation. Then, the strength of the material recovers to its robust state since the microcrack is rebounded. However, to effective...

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Autores principales:	Yoshitomo OBA, Kyohei TAKEO, Wataru NAKAO, Shingo OZAKI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	crack penetration/deflection fracture mechanics cmc fem cohesive zone model sintering Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/799db232ee1549e6b7f17815e775a1b0
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spelling	oai:doaj.org-article:799db232ee1549e6b7f17815e775a1b02021-11-26T07:11:27ZNumerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite2187-974510.1299/mej.16-00705https://doaj.org/article/799db232ee1549e6b7f17815e775a1b02017-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/5/4_16-00705/_pdf/-char/enhttps://doaj.org/toc/2187-9745Self-healing fiber-reinforced ceramic (shFRC) is a new functional material. When a microcrack propagates in this material, self-healing occurs owing to high-temperature oxidation. Then, the strength of the material recovers to its robust state since the microcrack is rebounded. However, to effectively demonstrate the self-healing function, a crack bifurcation, i.e., penetration/deflection, must be controlled. Therefore, the optimal composite design, in which the microcrack is induced in the interface along the fiber, is a key factor in developing shFRC. In this study, we investigate crack propagation using Finite Element Analysis (FEA). In FEA, the two-dimensional microscopic structure of shFRC with a three-layer construction is discretized. The three layers of construction are the matrix layer, the fiber bundle layer, and the non-oxide layer, called the self-healing agent. Using FEA, we examine ideal relationships of fracture stress and critical energy release rate between the fiber and interface layer considering the sintering characteristics. Furthermore, the relationship between fracture toughness, Young's modulus, and the relative density of the interlayer to induce a crack deflection at the interface is derived.Yoshitomo OBAKyohei TAKEOWataru NAKAOShingo OZAKIThe Japan Society of Mechanical Engineersarticlecrack penetration/deflectionfracture mechanicscmcfemcohesive zone modelsinteringMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 5, Pp 16-00705-16-00705 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	crack penetration/deflection fracture mechanics cmc fem cohesive zone model sintering Mechanical engineering and machinery TJ1-1570
spellingShingle	crack penetration/deflection fracture mechanics cmc fem cohesive zone model sintering Mechanical engineering and machinery TJ1-1570 Yoshitomo OBA Kyohei TAKEO Wataru NAKAO Shingo OZAKI Numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite
description	Self-healing fiber-reinforced ceramic (shFRC) is a new functional material. When a microcrack propagates in this material, self-healing occurs owing to high-temperature oxidation. Then, the strength of the material recovers to its robust state since the microcrack is rebounded. However, to effectively demonstrate the self-healing function, a crack bifurcation, i.e., penetration/deflection, must be controlled. Therefore, the optimal composite design, in which the microcrack is induced in the interface along the fiber, is a key factor in developing shFRC. In this study, we investigate crack propagation using Finite Element Analysis (FEA). In FEA, the two-dimensional microscopic structure of shFRC with a three-layer construction is discretized. The three layers of construction are the matrix layer, the fiber bundle layer, and the non-oxide layer, called the self-healing agent. Using FEA, we examine ideal relationships of fracture stress and critical energy release rate between the fiber and interface layer considering the sintering characteristics. Furthermore, the relationship between fracture toughness, Young's modulus, and the relative density of the interlayer to induce a crack deflection at the interface is derived.
format	article
author	Yoshitomo OBA Kyohei TAKEO Wataru NAKAO Shingo OZAKI
author_facet	Yoshitomo OBA Kyohei TAKEO Wataru NAKAO Shingo OZAKI
author_sort	Yoshitomo OBA
title	Numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite
title_short	Numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite
title_full	Numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite
title_fullStr	Numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite
title_full_unstemmed	Numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite
title_sort	numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/799db232ee1549e6b7f17815e775a1b0
work_keys_str_mv	AT yoshitomooba numericalstudyoncrackbifurcationofselfhealingfiberreinforcedceramicmatrixcomposite AT kyoheitakeo numericalstudyoncrackbifurcationofselfhealingfiberreinforcedceramicmatrixcomposite AT watarunakao numericalstudyoncrackbifurcationofselfhealingfiberreinforcedceramicmatrixcomposite AT shingoozaki numericalstudyoncrackbifurcationofselfhealingfiberreinforcedceramicmatrixcomposite
_version_	1718409728331087872

Numerical study on crack bifurcation of self-healing fiber-reinforced ceramic matrix composite

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