Further Aspects of Fracture Resistance Measurement on Thin Sheet Material: Yield Stress and Crack Length

AM Sullivan; J Stoop

doi:10.1520/STP38595S

SYMPOSIA PAPER Published: 01 January 1974

STP38595S

Further Aspects of Fracture Resistance Measurement on Thin Sheet Material: Yield Stress and Crack Length

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The fracture resistance value, K_c, has been determined for a number of alloys of aluminum, titanium, and steel and found to depend inversely upon the material yield stress. During this investigation various initial crack lengths, 2a_o, were employed.

Analysis of the data has disclosed that the amount of crack extension, that is, final crack length, 2a_c, appears to be influenced by the initial crack length. Plotted on a log-log scale of (a_o/a_c) versus β=[1B(cKybσ)2], statistical analysis justifies a relationship conforming to the equation ln⁡10(ao/ac)=A-Bln⁡10β which can be transformed to (aoac)=AβB

The development of these relationships can be of real assistance in the design of a standard initial screening test for K_c.

Author Information

Sullivan, AM

Fracture Machanics, Metallurgy Division, Naval Research Laboratory, Washington, D. C.

Stoop, J

Fracture Machanics, Metallurgy Division, Naval Research Laboratory, Washington, D. C.

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Details

Developed by Committee: E08

Pages: 99–110

DOI: 10.1520/STP38595S

ISBN-EB: 978-0-8031-5583-1

ISBN-13: 978-0-8031-0367-2

Further Aspects of Fracture Resistance Measurement on Thin Sheet Material: Yield Stress and Crack Length

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