Relationship Between Critical Stretch Zone Width, Crack-Tip Opening Displacement, and Fracture-Energy Criterion: Application to SA-516-70 Steel Plates

P Nguyen-Duy

doi:10.1520/STP28817S

SYMPOSIA PAPER Published: 01 January 1981

STP28817S

Relationship Between Critical Stretch Zone Width, Crack-Tip Opening Displacement, and Fracture-Energy Criterion: Application to SA-516-70 Steel Plates

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Relationships are developed between the crack-tip opening displacement (CTOD), fracture-energy criterion (J_Ic), and critical stretch zone width (W_SZc) using a simple geometrical model of the crack tip. Stretch zone width is directly measured from micrographs of fracture surfaces.

For three-point-bend specimens of SA-516-70 steel, J_Ic evaluated from measured values of W_SZc is equal to 0.173 MJ-m⁻² compared with 0.200 MJ-m⁻² determined from the single-specimen method in which the crack onset point is detected by the electrical potential method.

Author Information

Nguyen-Duy, P

Institut de Recherche d'Hydro-Québec (IREQ), Varennes, Québec, Canada

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Details

Developed by Committee: E08

Pages: 543–552

DOI: 10.1520/STP28817S

ISBN-EB: 978-0-8031-4809-3

ISBN-13: 978-0-8031-0732-8

Relationship Between Critical Stretch Zone Width, Crack-Tip Opening Displacement, and Fracture-Energy Criterion: Application to SA-516-70 Steel Plates

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