Fracture toughness evaluation of interstitial free steel sheet using Essential Work of Fracture (EWF) method

S. K. Chandra; R. Sarkar; A. D. Bhowmick; P. S. De; P. C. Chakraborti; S. K. Ray

doi:10.1016/j.engfracmech.2018.09.026

Fracture toughness evaluation of interstitial free steel sheet using Essential Work of Fracture (EWF) method

S. K. Chandra
, R. Sarkar
, A. D. Bhowmick
, P. S. De
, P. C. Chakraborti
, S. K. Ray

Jadavpur University
Indian Institute of Technology Madras

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

21 Citations (Scopus)

Abstract

Essential Work of Fracture (EWF) method has been used to evaluate ductile tearing resistance of interstitial-free (IF) steel sheet of 1 mm thickness. Experiments have been done on double edge notched tensile (DENT) specimens with and without fatigue precracking at three different quasi-static ramp rates. The fracture in all cases was flat with maximum specimen necking of 36% of thickness. The estimated crack tip opening angle (CTOA, ψ^e) was found to be essentially independent of ρ and also of deformation rate. The critical CTOA (φ_e) was optically estimated using a precracked DENT specimen. Also, the tearing resistance parameters obtained from EWF tests have been compared with that determined using 3-dimentional Finite Element Modeling (FEM). Results of FEM, along with a chosen traction-separation law, were used in a 3-dimentional Cohesive Zone Model (CZM) for flat fracture to simulate crack growth behavior in the DENT specimens.

Original language	English
Pages (from-to)	29-45
Number of pages	17
Journal	Engineering Fracture Mechanics
Volume	204
Early online date	19 Sept 2018
DOIs	https://doi.org/10.1016/j.engfracmech.2018.09.026
Publication status	Published - Dec 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Ltd

Funder

Funding Information:
The authors thank M/s Tata Steel, India, for providing the test material.

Funding

The authors thank M/s Tata Steel, India, for providing the test material.

Keywords

Cohesive zone model
Crack tip opening angle
EWF method
Interstitial free (IF) steel
Tearing resistance

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1016/j.engfracmech.2018.09.026

Cite this

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title = "Fracture toughness evaluation of interstitial free steel sheet using Essential Work of Fracture (EWF) method",

abstract = "Essential Work of Fracture (EWF) method has been used to evaluate ductile tearing resistance of interstitial-free (IF) steel sheet of 1 mm thickness. Experiments have been done on double edge notched tensile (DENT) specimens with and without fatigue precracking at three different quasi-static ramp rates. The fracture in all cases was flat with maximum specimen necking of 36\% of thickness. The estimated crack tip opening angle (CTOA, ψe) was found to be essentially independent of ρ and also of deformation rate. The critical CTOA (φe) was optically estimated using a precracked DENT specimen. Also, the tearing resistance parameters obtained from EWF tests have been compared with that determined using 3-dimentional Finite Element Modeling (FEM). Results of FEM, along with a chosen traction-separation law, were used in a 3-dimentional Cohesive Zone Model (CZM) for flat fracture to simulate crack growth behavior in the DENT specimens.",

keywords = "Cohesive zone model, Crack tip opening angle, EWF method, Interstitial free (IF) steel, Tearing resistance",

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note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = dec,

doi = "10.1016/j.engfracmech.2018.09.026",

language = "English",

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pages = "29--45",

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AU - Chandra, S. K.

AU - Sarkar, R.

AU - Bhowmick, A. D.

AU - De, P. S.

AU - Chakraborti, P. C.

AU - Ray, S. K.

PY - 2018/12

Y1 - 2018/12

N2 - Essential Work of Fracture (EWF) method has been used to evaluate ductile tearing resistance of interstitial-free (IF) steel sheet of 1 mm thickness. Experiments have been done on double edge notched tensile (DENT) specimens with and without fatigue precracking at three different quasi-static ramp rates. The fracture in all cases was flat with maximum specimen necking of 36% of thickness. The estimated crack tip opening angle (CTOA, ψe) was found to be essentially independent of ρ and also of deformation rate. The critical CTOA (φe) was optically estimated using a precracked DENT specimen. Also, the tearing resistance parameters obtained from EWF tests have been compared with that determined using 3-dimentional Finite Element Modeling (FEM). Results of FEM, along with a chosen traction-separation law, were used in a 3-dimentional Cohesive Zone Model (CZM) for flat fracture to simulate crack growth behavior in the DENT specimens.

AB - Essential Work of Fracture (EWF) method has been used to evaluate ductile tearing resistance of interstitial-free (IF) steel sheet of 1 mm thickness. Experiments have been done on double edge notched tensile (DENT) specimens with and without fatigue precracking at three different quasi-static ramp rates. The fracture in all cases was flat with maximum specimen necking of 36% of thickness. The estimated crack tip opening angle (CTOA, ψe) was found to be essentially independent of ρ and also of deformation rate. The critical CTOA (φe) was optically estimated using a precracked DENT specimen. Also, the tearing resistance parameters obtained from EWF tests have been compared with that determined using 3-dimentional Finite Element Modeling (FEM). Results of FEM, along with a chosen traction-separation law, were used in a 3-dimentional Cohesive Zone Model (CZM) for flat fracture to simulate crack growth behavior in the DENT specimens.

KW - Cohesive zone model

KW - Crack tip opening angle

KW - EWF method

KW - Interstitial free (IF) steel

KW - Tearing resistance

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DO - 10.1016/j.engfracmech.2018.09.026

M3 - Article

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JO - Engineering Fracture Mechanics

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ER -

Fracture toughness evaluation of interstitial free steel sheet using Essential Work of Fracture (EWF) method

Abstract

Bibliographical note

Funder

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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