J-integral measured from experimental torque load versus torque-ends rotation angle obtained from a spiral notch torsion test

Wang, Jy-An

doi:10.1016/j.tafmec.2020.102721

J-integral measured from experimental torque load versus torque-ends rotation angle obtained from a spiral notch torsion test

Journal Article · Fri Jul 24 00:00:00 EDT 2020 · Theoretical and Applied Fracture Mechanics

DOI:https://doi.org/10.1016/j.tafmec.2020.102721· OSTI ID:1649109

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

In this work, Spiral Notch Torsion Test (SNTT) was developed to measure the intrinsic fracture toughness of structural materials using small specimens. The SNTT system operates by applying pure torsion to cylindrical specimens with a notch line that spirals around the specimen at a 45° pitch. 3-D finite-element analysis has been used to estimate the fracture toughness obtained from SNTT test specimen with 3-D non-coplanar crack front. Furthermore, here a newly developed SNTT protocol to estimate J-integral directly from the experimental torque load versus torque-ends rotation angle trend curve without the aid of 3-D finite element analyses is presented and its applicability is illustrated by applying it for the evaluation of fracture toughness of SS304/308 weldment. The estimated JQ’ for the SS304/308 weld is 144.2 kJ/m2, which is consistent with that obtained from CT specimen.

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1649109

Alternate ID(s):: OSTI ID: 1644335

Journal Information:: Theoretical and Applied Fracture Mechanics, Journal Name: Theoretical and Applied Fracture Mechanics Journal Issue: None Vol. 109; ISSN 0167-8442

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
Fracture toughness
j-integral
miniature specimen
spiral notched torsion test

J-integral measured from experimental torque load versus torque-ends rotation angle obtained from a spiral notch torsion test

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References (13)

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