WRC 130:1968 (R1976)

$21.45

Advances in Fracture Toughness characterization Procedures and in Quantitative Interpretations to Fracture-Safe Design for Structural Steels

Published By	Publication Date	Number of Pages
WRC	1968	54

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Category: WRC

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Description

The state of knowledge of fracture-safe design for steels is examined in relation to the requirements for achieving practical solutions to general engineering problems. Analytical procedures evolved from fracture mechanics theory are demonstrated to provide for quantitative interpretations of engineering fracture toughness tests. It is thus possible to couple the procedural simplicity which is inherent to engineering tests with the analytical advantages of fracture mechanics theory. The coupling of these two approaches provides for practical advances in fracture-safe design which cover the totality of general engineering problems and requirements. The Charpy V test is shown to have applicability for use in the described fashion primarily in relation to the strength transition for high strength steels. Serious limitations exist for reliable quantitative interpretations involving the temperature transition. The Drop Weight Test (DWT) and the related Fracture Analysis Diagram (FAD) are demonstrated to be interpretable in terms of fracture mechanics parameters. Additional applications of the DWT which provide for separate definition of static and dynamic fracture initiation conditions have been evolved for the Nil Ductility Transition (NDT) temperature region. The resulting new reference diagram is defined as the NDT Analysis Diagram (NAD).

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