Size and deformation limits to maintain constraint in K{sub Ic} and J{sub c} testing of bend specimens

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Description

The ASTM Standard Test Method for Plane-Strain Fracture Toughness of metallic Materials (E399-90) restricts test specimen dimensions to insure the measurement of highly constrained fracture toughness values (K{sub Ic}). These requirements insure small-scale yielding (SSY) conditions at fracture, and thereby the validity of linear elastic fracture mechanics. Recently, Dodds and Anderson have proposed a less restrictive size requirement for cleavage fracture toughness measured in terms of the J-integral (J{sub c}), as given by a, b, B {ge} 200 J{sub c}/{sigma}{sub 0}. The size requirement proposed by Dodds and Anderson increases the applicability of fracture toughness experiments by expanding the range ... continued below

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17 p.

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Koppenhoefer, K. C. & Dodds, R. H., Jr. October 1995.

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Description

The ASTM Standard Test Method for Plane-Strain Fracture Toughness of metallic Materials (E399-90) restricts test specimen dimensions to insure the measurement of highly constrained fracture toughness values (K{sub Ic}). These requirements insure small-scale yielding (SSY) conditions at fracture, and thereby the validity of linear elastic fracture mechanics. Recently, Dodds and Anderson have proposed a less restrictive size requirement for cleavage fracture toughness measured in terms of the J-integral (J{sub c}), as given by a, b, B {ge} 200 J{sub c}/{sigma}{sub 0}. The size requirement proposed by Dodds and Anderson increases the applicability of fracture toughness experiments by expanding the range of conditions over which fracture toughness data meeting SSY conditions can be reliably measured. This investigation compares the proposed size requirement with that of ASTM Standard Test Method E399 and, by comparison with published experimental data for various alloys, provides validation of the new requirements.

Physical Description

17 p.

Notes

INIS; OSTI as TI96002335

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  • Other Information: PBD: Oct 1995

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  • Other: TI96002335
  • Report No.: NUREG/CR--6191
  • Report No.: UILU-ENG--94-2002
  • DOI: 10.2172/132781 | External Link
  • Office of Scientific & Technical Information Report Number: 132781
  • Archival Resource Key: ark:/67531/metadc620077

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 1995

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  • June 16, 2015, 7:43 a.m.

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  • April 8, 2016, 8:25 p.m.

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Koppenhoefer, K. C. & Dodds, R. H., Jr. Size and deformation limits to maintain constraint in K{sub Ic} and J{sub c} testing of bend specimens, report, October 1995; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc620077/: accessed November 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.