| Title: | Effects of fixture configurations and weld strength mismatch on J-integral calculation procedure for SE(B) specimens |
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| Authors: | ID Štefane, Primož (Author)
ID Hertelé, Stijn (Author)
ID Naib, Sameera (Author)
ID Waele, Wim de (Author)
ID Gubeljak, Nenad (Author) |
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| Files: |  materials-15-00962-v2.pdf (7,56 MB)
MD5: 089A8FD5C4FDD66889C447D7FE5BD244
 https://www.mdpi.com/1996-1944/15/3/962
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FS - Faculty of Mechanical Engineering
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| Abstract: | This work presents the development of a J-integral estimation procedure for deep and
shallow cracked bend specimens based upon plastic ηpl factors for a butt weld made in an S690 QL
high strength low alloyed steel. Experimental procedures include the characterization of average
material properties by tensile testing and evaluation of base and weld metal resistance to stable tearing
by fracture testing of square SE(B) specimens containing a weld centerline notch. J-integral has been
estimated from plastic work using a single specimen approach and the normalization data reduction
technique. A comprehensive parametric finite element study has been conducted to calibrate plastic
factor ηpl and geometry factor λ for various fixture and weld configurations, while a corresponding
plastic factor γpl was computed on the basis of the former two. The modified ηpl and γpl factors were
then incorporated in the J computation procedure given by the ASTM E1820 standard, for evaluation
of the plastic component of J and its corresponding correction due to crack growth, respectively. Two
kinds of J-R curves were computed on the basis of modified and standard ηpl and γpl factors, where
the latter are given by ASTM E1820. A comparison of produced J-R curves for the base material
revealed that variations in specimen fixtures can lead to ≈10% overestimation of computed fracture
toughness JIc. Furthermore, a comparison of J-R curves for overmatched single-material idealized
welds revealed that the application of standard ηpl and γpl factors can lead to the overestimation of
computed fracture toughness JIc by more than 10%. Similar observations are made for undermatched
single material idealized welds, where fracture toughness JIc is overestimated by ≈5%. |
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| Keywords: | metal weld, strength mismatch, fracture, plastic correction factors, fixture rollers, J-R resistance curve |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 30.11.2021 |
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| Article acceptance date: | 19.01.2022 |
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| Publication date: | 26.01.2022 |
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| Publisher: | MDPI AG |
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| Year of publishing: | 2022 |
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| Number of pages: | str. 1-24 |
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| Numbering: | Vol. 15, iss. 3 |
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| PID: | 20.500.12556/DKUM-92195  |
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| UDC: | 621.791:539.42 |
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| ISSN on article: | 1996-1944 |
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| COBISS.SI-ID: | 95190531 |
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| DOI: | 10.3390/ma15030962 |
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| Copyright: | © 2022 by the authors |
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| Publication date in DKUM: | 20.03.2025 |
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| Views: | 137 |
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| Downloads: | 16 |
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| Metadata: |    |
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| Categories: | Misc.
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