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Photonics and fracture toughness of heterogeneous composite materials

Abstract Fracture toughness measures the resistance of a material to fracture. This fundamental property is used in diverse engineering designs including mechanical, civil, materials, electronics and chemical engineering applications. In spite of the advancements made in the past 40 years, the evalu...

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Autores principales:	S. Joseph Antony, George Okeke, D. Deniz Tokgoz, N. Gozde Ozerkan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/77c6033412b34ab79aad664d7028cc96
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spelling	oai:doaj.org-article:77c6033412b34ab79aad664d7028cc962021-12-02T12:31:52ZPhotonics and fracture toughness of heterogeneous composite materials10.1038/s41598-017-04782-72045-2322https://doaj.org/article/77c6033412b34ab79aad664d7028cc962017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04782-7https://doaj.org/toc/2045-2322Abstract Fracture toughness measures the resistance of a material to fracture. This fundamental property is used in diverse engineering designs including mechanical, civil, materials, electronics and chemical engineering applications. In spite of the advancements made in the past 40 years, the evaluation of this remains challenging for extremely heterogeneous materials such as composite concretes. By taking advantage of the optical properties of a thin birefringent coating on the surface of opaque, notched composite concrete beams, here we sense the evolution of the maximum shear stress distribution on the beams under loading. The location of the maximum deviator stress is tracked ahead of the crack tip on the experimental concrete samples under the ultimate load, and hence the effective crack length is characterised. Using this, the fracture toughness of a number of heterogeneous composite beams is evaluated and the results compare favourably well with other conventional methods using combined experimental and numerical/analytical approaches. Finally a new model, correlating the optically measured shear stress concentration factor and flexural strength with the fracture toughness of concretes is proposed. The current photonics-based study could be vital in evaluating the fracture toughness of even opaque and complex heterogeneous materials more effectively in future.S. Joseph AntonyGeorge OkekeD. Deniz TokgozN. Gozde OzerkanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. Joseph Antony George Okeke D. Deniz Tokgoz N. Gozde Ozerkan Photonics and fracture toughness of heterogeneous composite materials
description	Abstract Fracture toughness measures the resistance of a material to fracture. This fundamental property is used in diverse engineering designs including mechanical, civil, materials, electronics and chemical engineering applications. In spite of the advancements made in the past 40 years, the evaluation of this remains challenging for extremely heterogeneous materials such as composite concretes. By taking advantage of the optical properties of a thin birefringent coating on the surface of opaque, notched composite concrete beams, here we sense the evolution of the maximum shear stress distribution on the beams under loading. The location of the maximum deviator stress is tracked ahead of the crack tip on the experimental concrete samples under the ultimate load, and hence the effective crack length is characterised. Using this, the fracture toughness of a number of heterogeneous composite beams is evaluated and the results compare favourably well with other conventional methods using combined experimental and numerical/analytical approaches. Finally a new model, correlating the optically measured shear stress concentration factor and flexural strength with the fracture toughness of concretes is proposed. The current photonics-based study could be vital in evaluating the fracture toughness of even opaque and complex heterogeneous materials more effectively in future.
format	article
author	S. Joseph Antony George Okeke D. Deniz Tokgoz N. Gozde Ozerkan
author_facet	S. Joseph Antony George Okeke D. Deniz Tokgoz N. Gozde Ozerkan
author_sort	S. Joseph Antony
title	Photonics and fracture toughness of heterogeneous composite materials
title_short	Photonics and fracture toughness of heterogeneous composite materials
title_full	Photonics and fracture toughness of heterogeneous composite materials
title_fullStr	Photonics and fracture toughness of heterogeneous composite materials
title_full_unstemmed	Photonics and fracture toughness of heterogeneous composite materials
title_sort	photonics and fracture toughness of heterogeneous composite materials
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/77c6033412b34ab79aad664d7028cc96
work_keys_str_mv	AT sjosephantony photonicsandfracturetoughnessofheterogeneouscompositematerials AT georgeokeke photonicsandfracturetoughnessofheterogeneouscompositematerials AT ddeniztokgoz photonicsandfracturetoughnessofheterogeneouscompositematerials AT ngozdeozerkan photonicsandfracturetoughnessofheterogeneouscompositematerials
_version_	1718394223654338560

Photonics and fracture toughness of heterogeneous composite materials

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