A New Approach to Evaluate Fracture Toughness of Structural Materials

Wang, J. A.; Liu, K. C.

doi:10.1115/1.1804202

A New Approach to Evaluate Fracture Toughness of Structural Materials

Journal Article · Tue Nov 30 23:00:00 EST 2004 · Journal of Pressure Vessel Technology

DOI:https://doi.org/10.1115/1.1804202· OSTI ID:1784104

^[1]; Liu, K. C. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

A new method, designated as Spiral Notch Torsion Test (SNTT), is developed recently to measure the intrinsic fracture toughness K_IC of structural materials. The SNTT overcomes many of the limitations inherent in traditional techniques and makes it possible to standardize fracture toughness testing. It is uniquely suitable for testing a wide variety of materials used extensively in pressure vessel and piping structural components and weldments, including others such as ceramics, their composites, and concrete. The SNTT system operates by applying pure torsion to uniform cylindrical specimens with a notch line that spirals around the specimen at a 45 deg pitch. The K_IC values are obtained with the aid of a three-dimensional finite-element computer code, TOR3D-KIC, developed at Oak Ridge National Laboratory (ORNL). The fundamental mechanism of SNTT approach is also described in the paper.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1784104

Journal Information:: Journal of Pressure Vessel Technology, Journal Name: Journal of Pressure Vessel Technology Journal Issue: 4 Vol. 126; ISSN 0094-9930

Publisher:: ASMECopyright Statement

Country of Publication:: United States

Language:: English

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