SYMPOSIA PAPER Published: 01 January 1983
STP36801S

Further Developments of a -Based Design Curve and Its Relationship to Other Procedures

Source

The existing so-called J-design curve is based on shallow-notch data (a/W ⩽ 0.1) and in many other ways is in a less-developed form than the corresponding crackopening displacement and R-6 procedures. A specific though simplified relationship between the three methods of assessment is pointed out and a modified J-estimation method is then proposed. The features of load or displacement control, shallow or deep notches, stress concentrations, and residual stresses are discussed and proposals made to encompass them within the revised procedure. The normalized J, JE/Y2σY2a is expressed as a function of an effective structural strain that depends upon notch depth. One equation is used to describe the load-controlled region of linear elastic fracture mechanics and contained yield, and another, the strain-controlled regime at or above ligament limit load.

Author Information

Turner, CE
Imperial College, London, U.K.
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Details
Developed by Committee: E08
Pages: 80–102
DOI: 10.1520/STP36801S
ISBN-EB: 978-0-8031-4870-3
ISBN-13: 978-0-8031-0726-7