Effects of crack length and shape on the fracture toughness of a high strength steel 300m

Julia E. King*, J.F. Knott

*Corresponding author for this work

    Research output: Contribution to journal › Article

    Abstract

    The results of fracture toughness tests on a high strength steel 300m are presented. These results show (i) that in the presence of through-thickness cracks the toughness remains constant down to (a/W)-ratios as low as 0.01 and failure loads up to 0.85σy, and (ii) that the material is more resistant to crack growth when the cracks are semi-elliptical in shape, giving a toughness value which is almost 25 per cent higher than the through-thickness one. Three independent stress analyses are used to obtain stress intensity values for the semi-elliptical cracks and additional confirmation of the increase in toughness comes from stretch zone measurements.
    Original languageEnglish
    Pages (from-to)191-200
    Number of pages10
    JournalJournal of the Mechanics and Physics of Solids
    Volume28
    Issue number3-4
    DOIs
    Publication statusPublished - Aug 1980

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    high strength steels
    fracture strength
    High strength steel
    Toughness
    Fracture toughness
    toughness
    cracks
    Cracks
    Crack propagation

    Keywords

    • steel

    Cite this

    King, Julia E. ; Knott, J.F. / Effects of crack length and shape on the fracture toughness of a high strength steel 300m. In: Journal of the Mechanics and Physics of Solids. 1980 ; Vol. 28, No. 3-4. pp. 191-200.
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    abstract = "The results of fracture toughness tests on a high strength steel 300m are presented. These results show (i) that in the presence of through-thickness cracks the toughness remains constant down to (a/W)-ratios as low as 0.01 and failure loads up to 0.85σy, and (ii) that the material is more resistant to crack growth when the cracks are semi-elliptical in shape, giving a toughness value which is almost 25 per cent higher than the through-thickness one. Three independent stress analyses are used to obtain stress intensity values for the semi-elliptical cracks and additional confirmation of the increase in toughness comes from stretch zone measurements.",
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    King, JE & Knott, JF 1980, 'Effects of crack length and shape on the fracture toughness of a high strength steel 300m', Journal of the Mechanics and Physics of Solids, vol. 28, no. 3-4, pp. 191-200. https://doi.org/10.1016/0022-5096(80)90003-4

    Effects of crack length and shape on the fracture toughness of a high strength steel 300m. / King, Julia E.; Knott, J.F.

    In: Journal of the Mechanics and Physics of Solids, Vol. 28, No. 3-4, 08.1980, p. 191-200.

    Research output: Contribution to journal › Article

    TY - JOUR

    T1 - Effects of crack length and shape on the fracture toughness of a high strength steel 300m

    AU - King, Julia E.

    AU - Knott, J.F.

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    N2 - The results of fracture toughness tests on a high strength steel 300m are presented. These results show (i) that in the presence of through-thickness cracks the toughness remains constant down to (a/W)-ratios as low as 0.01 and failure loads up to 0.85σy, and (ii) that the material is more resistant to crack growth when the cracks are semi-elliptical in shape, giving a toughness value which is almost 25 per cent higher than the through-thickness one. Three independent stress analyses are used to obtain stress intensity values for the semi-elliptical cracks and additional confirmation of the increase in toughness comes from stretch zone measurements.

    AB - The results of fracture toughness tests on a high strength steel 300m are presented. These results show (i) that in the presence of through-thickness cracks the toughness remains constant down to (a/W)-ratios as low as 0.01 and failure loads up to 0.85σy, and (ii) that the material is more resistant to crack growth when the cracks are semi-elliptical in shape, giving a toughness value which is almost 25 per cent higher than the through-thickness one. Three independent stress analyses are used to obtain stress intensity values for the semi-elliptical cracks and additional confirmation of the increase in toughness comes from stretch zone measurements.

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    King JE, Knott JF. Effects of crack length and shape on the fracture toughness of a high strength steel 300m. Journal of the Mechanics and Physics of Solids. 1980 Aug;28(3-4):191-200. https://doi.org/10.1016/0022-5096(80)90003-4

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