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

Abstract

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.

Authors:
ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1649109
Alternate Identifier(s):
OSTI ID: 1644335
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Theoretical and Applied Fracture Mechanics
Additional Journal Information:
Journal Volume: 109; Journal Issue: None; Journal ID: ISSN 0167-8442
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Fracture toughness; spiral notched torsion test; miniature specimen; j-integral

Citation Formats

Wang, Jy-An. J-integral measured from experimental torque load versus torque-ends rotation angle obtained from a spiral notch torsion test. United States: N. p., 2020. Web. https://doi.org/10.1016/j.tafmec.2020.102721.
Wang, Jy-An. J-integral measured from experimental torque load versus torque-ends rotation angle obtained from a spiral notch torsion test. United States. https://doi.org/10.1016/j.tafmec.2020.102721
Wang, Jy-An. Fri . "J-integral measured from experimental torque load versus torque-ends rotation angle obtained from a spiral notch torsion test". United States. https://doi.org/10.1016/j.tafmec.2020.102721. https://www.osti.gov/servlets/purl/1649109.
@article{osti_1649109,
title = {J-integral measured from experimental torque load versus torque-ends rotation angle obtained from a spiral notch torsion test},
author = {Wang, Jy-An},
abstractNote = {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.},
doi = {10.1016/j.tafmec.2020.102721},
journal = {Theoretical and Applied Fracture Mechanics},
number = None,
volume = 109,
place = {United States},
year = {2020},
month = {7}
}

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