Measurement of crack opening displacement and energy release hate at bifurcation of fast propagating cracks

Shinichi Suzuki, Kenichi Sakaue, Takahisa Mizuta, Yasutoshi Sasaki

Research output: Contribution to journalArticle

Abstract

High speed holographic microscopy is applied to take three successive photographs of fast propagating.cracks at the moment of bifurcation. The cracks are propagated in PMMA plate specimens at a speed of about 660 m/s. From the photographs, crack opening displacement (COD) is measured along the cracks as a function of distance r from the crack tips. The measurement results show that the CODs are proportional to √r before bifurcation. After bifurcation, the COD, of mother cracks are proportional to √r, however, those of bifurcated cracks are not always proportional to √r. The energy release rate is obtained from the COD data, and is found to be continuous across the bifurcation point. The continuity of the energy release rate is explained through the fact that the bifurcated cracks appear as three dimensional cracks, not as through cracks.

Original languageEnglish
Pages (from-to)2010-2017
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume67
Issue number664
Publication statusPublished - 2001
Externally publishedYes

Fingerprint

Cracks
Energy release rate
Polymethyl Methacrylate
Crack tips
Microscopic examination

Keywords

  • Brink-fracture
  • Crack bifurcation
  • Crack opening displacement
  • Experimental stress analyses
  • Fracture mechanics
  • High polymer materials
  • Knergy release rate
  • Optical measurement

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Measurement of crack opening displacement and energy release hate at bifurcation of fast propagating cracks. / Suzuki, Shinichi; Sakaue, Kenichi; Mizuta, Takahisa; Sasaki, Yasutoshi.

In: Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 67, No. 664, 2001, p. 2010-2017.

Research output: Contribution to journalArticle

@article{90c12e00371648748329007523b0c441,
title = "Measurement of crack opening displacement and energy release hate at bifurcation of fast propagating cracks",
abstract = "High speed holographic microscopy is applied to take three successive photographs of fast propagating.cracks at the moment of bifurcation. The cracks are propagated in PMMA plate specimens at a speed of about 660 m/s. From the photographs, crack opening displacement (COD) is measured along the cracks as a function of distance r from the crack tips. The measurement results show that the CODs are proportional to √r before bifurcation. After bifurcation, the COD, of mother cracks are proportional to √r, however, those of bifurcated cracks are not always proportional to √r. The energy release rate is obtained from the COD data, and is found to be continuous across the bifurcation point. The continuity of the energy release rate is explained through the fact that the bifurcated cracks appear as three dimensional cracks, not as through cracks.",
keywords = "Brink-fracture, Crack bifurcation, Crack opening displacement, Experimental stress analyses, Fracture mechanics, High polymer materials, Knergy release rate, Optical measurement",
author = "Shinichi Suzuki and Kenichi Sakaue and Takahisa Mizuta and Yasutoshi Sasaki",
year = "2001",
language = "English",
volume = "67",
pages = "2010--2017",
journal = "Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A",
issn = "0387-5008",
publisher = "Japan Society of Mechanical Engineers",
number = "664",

}

TY - JOUR

T1 - Measurement of crack opening displacement and energy release hate at bifurcation of fast propagating cracks

AU - Suzuki, Shinichi

AU - Sakaue, Kenichi

AU - Mizuta, Takahisa

AU - Sasaki, Yasutoshi

PY - 2001

Y1 - 2001

N2 - High speed holographic microscopy is applied to take three successive photographs of fast propagating.cracks at the moment of bifurcation. The cracks are propagated in PMMA plate specimens at a speed of about 660 m/s. From the photographs, crack opening displacement (COD) is measured along the cracks as a function of distance r from the crack tips. The measurement results show that the CODs are proportional to √r before bifurcation. After bifurcation, the COD, of mother cracks are proportional to √r, however, those of bifurcated cracks are not always proportional to √r. The energy release rate is obtained from the COD data, and is found to be continuous across the bifurcation point. The continuity of the energy release rate is explained through the fact that the bifurcated cracks appear as three dimensional cracks, not as through cracks.

AB - High speed holographic microscopy is applied to take three successive photographs of fast propagating.cracks at the moment of bifurcation. The cracks are propagated in PMMA plate specimens at a speed of about 660 m/s. From the photographs, crack opening displacement (COD) is measured along the cracks as a function of distance r from the crack tips. The measurement results show that the CODs are proportional to √r before bifurcation. After bifurcation, the COD, of mother cracks are proportional to √r, however, those of bifurcated cracks are not always proportional to √r. The energy release rate is obtained from the COD data, and is found to be continuous across the bifurcation point. The continuity of the energy release rate is explained through the fact that the bifurcated cracks appear as three dimensional cracks, not as through cracks.

KW - Brink-fracture

KW - Crack bifurcation

KW - Crack opening displacement

KW - Experimental stress analyses

KW - Fracture mechanics

KW - High polymer materials

KW - Knergy release rate

KW - Optical measurement

UR - http://www.scopus.com/inward/record.url?scp=77949669297&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77949669297&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:77949669297

VL - 67

SP - 2010

EP - 2017

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

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

SN - 0387-5008

IS - 664

ER -