Modifications of ASTM E 813-81 Standard Test Method for an Improved Definition of Using New Blunting-Line Equation

J Heerens; K-H Schwalbe; A Cornec

doi:10.1520/STP23253S

SYMPOSIA PAPER Published: 01 January 1988

STP23253S

Modifications of ASTM E 813-81 Standard Test Method for an Improved Definition of Using New Blunting-Line Equation

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A test procedure for determining the fracture resistance of ductile metallic materials under stable crack growth conditions is described. The procedure consists of the determination of a J-Δa curve with particular emphasis on the near-initiation region. In our proposal, J_Ic is defined as the fracture resistance at 0.2-mm stable ductile tearing. It is determined by the intersection of the J-Δa curve with an intercept line which is parallel to and 0.2 mm off the blunting line. The blunting-line formula is improved by accounting for the strain hardening behavior of the material. A simple determination of the blunting-line equation is shown, and its applicability is checked using a broad range of materials.

Author Information

Heerens, J

GKSS Research Center Geesthacht, Geesthacht, West Germany

Schwalbe, K-H

GKSS Research Center Geesthacht, Geesthacht, West Germany

Cornec, A

GKSS Research Center Geesthacht, Geesthacht, West Germany

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Details

Developed by Committee: E08

Pages: 374–389

DOI: 10.1520/STP23253S

ISBN-EB: 978-0-8031-5036-2

ISBN-13: 978-0-8031-0949-0

Modifications of ASTM E 813-81 Standard Test Method for an Improved Definition of Using New Blunting-Line Equation

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