SYMPOSIA PAPER Published: 01 January 1976
STP27802S

Fracture Analysis of Various Cracked Configurations in Sheet and Plate Materials

Source

A two-parameter fracture criterion has been derived which relates the linear-elastic stress-intensity factor at failure, the elastic nominal failure stress, and two material parameters. The fracture criterion was used previously to analyze fracture data for surface- and through-cracked sheet and plate specimens under tensile loading. In the present paper the fracture criterion was applied to center-crack tension, compact, and notch-bend fracture specimens made of steel, titanium, or aluminum alloy materials tested at room temperature. The fracture data included a wide range of crack lengths, specimen widths, and thicknesses. The materials analyzed had a wide range of tensile properties. Failure stresses calculated using the criterion agreed well (± 10 percent) with experimental failure stresses. The criterion was also found to correlate fracture data from different specimen types (such as center-crack tension and compact specimens), within ± 10 percent for the same material, thickness, and test temperature.

Author Information

Newman, JC
NASA-Langley Research Center, Hampton, Va.
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Details
Developed by Committee: E08
Pages: 104–123
DOI: 10.1520/STP27802S
ISBN-EB: 978-0-8031-4679-2
ISBN-13: 978-0-8031-0540-9