SYMPOSIA PAPER Published: 01 January 1974
STP38595S

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

Source

The fracture resistance value, Kc, 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, 2ao, were employed.

Analysis of the data has disclosed that the amount of crack extension, that is, final crack length, 2ac, appears to be influenced by the initial crack length. Plotted on a log-log scale of (ao/ac) versus β=[1B(cKybσ)2], statistical analysis justifies a relationship conforming to the equation ln10(ao/ac)=A-Bln10β 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 Kc.

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