CHARACTERIZATION OF FRACTURE ARREST IN A STRUCTURAL STEEL.

被引：0
|
作者：
Hahn, G.T.
Hoagland, R.G.
Kanninen, M.F.
Rosenfield, A.R.
机构：
来源：
Ship Structure Committee (Report) SSC (United States) | 1973年
关键词：
STEEL TESTING - Fracture;
D O I：
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学科分类号：
摘要：
A new method of characterizing the fracture arrest capabilities of structural steels is described. The method employs wedge-loaded ″duplex″ double-cantilever-beam (DCB) specimens and a fully dynamic analysis of crack propagation in the test piece. In this way unstable fractures can be initiated and arrested over a wide range of temperature encompassing the transition temperature, the speed of unstable fracture in the test piece can be controlled, and R or K//d, the dynamic fracture energy or dynamic toughness of the material, can be evaluated. Results for fractures propagating at 600 ms** minus **1 to 1100 ms** minus **1 in. 12. 7 mm- and 25. 4 mm-thick plates of A517F steel and SAE 4340 steel at 0 degree C and minus 78 degree C, are described. The analysis of the test data lends support to the view that kinetic energy contributes to the crack driving force, and that K//a, the static stress intensity at arrest is not a material property.
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页码：25 / 54
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