Measurement of crack opening displacements of branch cracks on both surfaces of plate specimens at bifurcation of fast propagating cracks

Shinichi Suzuki; Kenichi Sakaue

doi:10.1299/kikaia.70.1312

Measurement of crack opening displacements of branch cracks on both surfaces of plate specimens at bifurcation of fast propagating cracks

Research output: Contribution to journal › Article › peer-review

Abstract

Pulsed holographic microscopy is applied to take photographs of a rapidly bifurcating crack in a PMMA plate specimen. The crack is the opening mode and propagates at a speed more than 600 m/s. Two photographs are simultaneously taken on the both sides of the specimen about 15 μs after bifurcation. Crack opening dislacements, COD_s, of branch cracks are measured from the photographs on both specimen surfaces. It is found that one of the two branch cracks appears as a surface crack, Also found is that the two branch cracks propagate at the same speed even though one of the two branch cracks is not linked to the mother crack on one side of the specimen. And the COD_s of the branch crack that didn't perfectly connect with the mother crack become smaller near the bifurcation point. This fact indicates clearly that the rapid crack bifurcation is three dimensional phenomenon.

Original language	English
Pages (from-to)	1312-1318
Number of pages	7
Journal	Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	70
Issue number	9
DOIs	https://doi.org/10.1299/kikaia.70.1312
Publication status	Published - 2004 Sept
Externally published	Yes

Keywords

Brittle Fracture
Crack Bifurcation
Crack Opening Displacement
Crack Propagation
Experimental Stress Analysis
Fracture Mechanics
High-Polymer Materials
Impact Strength

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1299/kikaia.70.1312

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Measurement of crack opening displacements of branch cracks on both surfaces of plate specimens at bifurcation of fast propagating cracks. / Suzuki, Shinichi; Sakaue, Kenichi.

In: Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 70, No. 9, 09.2004, p. 1312-1318.

Research output: Contribution to journal › Article › peer-review

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title = "Measurement of crack opening displacements of branch cracks on both surfaces of plate specimens at bifurcation of fast propagating cracks",

abstract = "Pulsed holographic microscopy is applied to take photographs of a rapidly bifurcating crack in a PMMA plate specimen. The crack is the opening mode and propagates at a speed more than 600 m/s. Two photographs are simultaneously taken on the both sides of the specimen about 15 μs after bifurcation. Crack opening dislacements, CODs, of branch cracks are measured from the photographs on both specimen surfaces. It is found that one of the two branch cracks appears as a surface crack, Also found is that the two branch cracks propagate at the same speed even though one of the two branch cracks is not linked to the mother crack on one side of the specimen. And the CODs of the branch crack that didn't perfectly connect with the mother crack become smaller near the bifurcation point. This fact indicates clearly that the rapid crack bifurcation is three dimensional phenomenon.",

keywords = "Brittle Fracture, Crack Bifurcation, Crack Opening Displacement, Crack Propagation, Experimental Stress Analysis, Fracture Mechanics, High-Polymer Materials, Impact Strength",

author = "Shinichi Suzuki and Kenichi Sakaue",

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T1 - Measurement of crack opening displacements of branch cracks on both surfaces of plate specimens at bifurcation of fast propagating cracks

AU - Suzuki, Shinichi

AU - Sakaue, Kenichi

PY - 2004/9

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N2 - Pulsed holographic microscopy is applied to take photographs of a rapidly bifurcating crack in a PMMA plate specimen. The crack is the opening mode and propagates at a speed more than 600 m/s. Two photographs are simultaneously taken on the both sides of the specimen about 15 μs after bifurcation. Crack opening dislacements, CODs, of branch cracks are measured from the photographs on both specimen surfaces. It is found that one of the two branch cracks appears as a surface crack, Also found is that the two branch cracks propagate at the same speed even though one of the two branch cracks is not linked to the mother crack on one side of the specimen. And the CODs of the branch crack that didn't perfectly connect with the mother crack become smaller near the bifurcation point. This fact indicates clearly that the rapid crack bifurcation is three dimensional phenomenon.

AB - Pulsed holographic microscopy is applied to take photographs of a rapidly bifurcating crack in a PMMA plate specimen. The crack is the opening mode and propagates at a speed more than 600 m/s. Two photographs are simultaneously taken on the both sides of the specimen about 15 μs after bifurcation. Crack opening dislacements, CODs, of branch cracks are measured from the photographs on both specimen surfaces. It is found that one of the two branch cracks appears as a surface crack, Also found is that the two branch cracks propagate at the same speed even though one of the two branch cracks is not linked to the mother crack on one side of the specimen. And the CODs of the branch crack that didn't perfectly connect with the mother crack become smaller near the bifurcation point. This fact indicates clearly that the rapid crack bifurcation is three dimensional phenomenon.

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KW - Crack Propagation

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KW - Fracture Mechanics

KW - High-Polymer Materials

KW - Impact Strength

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JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

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Measurement of crack opening displacements of branch cracks on both surfaces of plate specimens at bifurcation of fast propagating cracks

Abstract

Keywords

ASJC Scopus subject areas

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