Determination of opening mode stress intensity factor in edge cracked specimen by means of digital shearography

D. Ghahremani-Moghadam, A. Gallehdari, S. Hadidi-Moud

Research output: Contribution to conferencePaper

Abstract

In this paper, digital Shearography as a non-destructive technique is deployed to determine the opening mode stress intensity factor in an edge cracked specimen subjected to tensile loading. The optical setup was consisted of two in-plane illumination sources to determine purposed strain variable and consequently to obtain the opening mode stress intensity factor based on the assumptions of linear elastic fracture mechanics (LEFM). The speckle pattern images taken by a CCD camera were recorded and saved on a computer. In order to utilize the advantage of whole field Shearography and minimise the random experimental errors, the least square technique was used to obtain the stress intensity factors. A finite element model of the specific geometry was constructed, and ABAQUS v6.7 commercial software was used to perform the analyses. Comparison of the experimental data with the numerical results proved the credibility and potential of this non-destructive method as a practical measurement technique. The average difference between the results obtained from experiments and those of finite element analyses was nearly 8%.
Original languageUndefined
Publication statusPublished - 2012
Event19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety: ECF 2012 - Kazan, Russian Federation
Duration: 26 Aug 201231 Aug 2012
Conference number: 19

Conference

Conference19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety
CountryRussian Federation
CityKazan
Period26/08/1231/08/12

Keywords

  • Digital Shearography
  • Finite Element Analysis
  • Stress intensity factor

Cite this

Ghahremani-Moghadam, D., Gallehdari, A., & Hadidi-Moud, S. (2012). Determination of opening mode stress intensity factor in edge cracked specimen by means of digital shearography. Paper presented at 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, Kazan, Russian Federation.

Determination of opening mode stress intensity factor in edge cracked specimen by means of digital shearography. / Ghahremani-Moghadam, D.; Gallehdari, A.; Hadidi-Moud, S.

2012. Paper presented at 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, Kazan, Russian Federation.

Research output: Contribution to conferencePaper

Ghahremani-Moghadam, D, Gallehdari, A & Hadidi-Moud, S 2012, 'Determination of opening mode stress intensity factor in edge cracked specimen by means of digital shearography' Paper presented at 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, Kazan, Russian Federation, 26/08/12 - 31/08/12, .
Ghahremani-Moghadam D, Gallehdari A, Hadidi-Moud S. Determination of opening mode stress intensity factor in edge cracked specimen by means of digital shearography. 2012. Paper presented at 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, Kazan, Russian Federation.
Ghahremani-Moghadam, D. ; Gallehdari, A. ; Hadidi-Moud, S. / Determination of opening mode stress intensity factor in edge cracked specimen by means of digital shearography. Paper presented at 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, Kazan, Russian Federation.
@conference{7d85557375d34ca4b43038d0d122d911,
title = "Determination of opening mode stress intensity factor in edge cracked specimen by means of digital shearography",
abstract = "In this paper, digital Shearography as a non-destructive technique is deployed to determine the opening mode stress intensity factor in an edge cracked specimen subjected to tensile loading. The optical setup was consisted of two in-plane illumination sources to determine purposed strain variable and consequently to obtain the opening mode stress intensity factor based on the assumptions of linear elastic fracture mechanics (LEFM). The speckle pattern images taken by a CCD camera were recorded and saved on a computer. In order to utilize the advantage of whole field Shearography and minimise the random experimental errors, the least square technique was used to obtain the stress intensity factors. A finite element model of the specific geometry was constructed, and ABAQUS v6.7 commercial software was used to perform the analyses. Comparison of the experimental data with the numerical results proved the credibility and potential of this non-destructive method as a practical measurement technique. The average difference between the results obtained from experiments and those of finite element analyses was nearly 8{\%}.",
keywords = "Digital Shearography, Finite Element Analysis, Stress intensity factor",
author = "D. Ghahremani-Moghadam and A. Gallehdari and S. Hadidi-Moud",
year = "2012",
language = "Undefined",
note = "null ; Conference date: 26-08-2012 Through 31-08-2012",

}

TY - CONF

T1 - Determination of opening mode stress intensity factor in edge cracked specimen by means of digital shearography

AU - Ghahremani-Moghadam, D.

AU - Gallehdari, A.

AU - Hadidi-Moud, S.

PY - 2012

Y1 - 2012

N2 - In this paper, digital Shearography as a non-destructive technique is deployed to determine the opening mode stress intensity factor in an edge cracked specimen subjected to tensile loading. The optical setup was consisted of two in-plane illumination sources to determine purposed strain variable and consequently to obtain the opening mode stress intensity factor based on the assumptions of linear elastic fracture mechanics (LEFM). The speckle pattern images taken by a CCD camera were recorded and saved on a computer. In order to utilize the advantage of whole field Shearography and minimise the random experimental errors, the least square technique was used to obtain the stress intensity factors. A finite element model of the specific geometry was constructed, and ABAQUS v6.7 commercial software was used to perform the analyses. Comparison of the experimental data with the numerical results proved the credibility and potential of this non-destructive method as a practical measurement technique. The average difference between the results obtained from experiments and those of finite element analyses was nearly 8%.

AB - In this paper, digital Shearography as a non-destructive technique is deployed to determine the opening mode stress intensity factor in an edge cracked specimen subjected to tensile loading. The optical setup was consisted of two in-plane illumination sources to determine purposed strain variable and consequently to obtain the opening mode stress intensity factor based on the assumptions of linear elastic fracture mechanics (LEFM). The speckle pattern images taken by a CCD camera were recorded and saved on a computer. In order to utilize the advantage of whole field Shearography and minimise the random experimental errors, the least square technique was used to obtain the stress intensity factors. A finite element model of the specific geometry was constructed, and ABAQUS v6.7 commercial software was used to perform the analyses. Comparison of the experimental data with the numerical results proved the credibility and potential of this non-destructive method as a practical measurement technique. The average difference between the results obtained from experiments and those of finite element analyses was nearly 8%.

KW - Digital Shearography

KW - Finite Element Analysis

KW - Stress intensity factor

M3 - Paper

ER -