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

Julia E. King; J.F. Knott

doi:10.1016/0022-5096(80)90003-4

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

Aston University

University of Cambridge

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

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 0.85σ_y, 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 language	English
Pages (from-to)	191-200
Number of pages	10
Journal	Journal of the Mechanics and Physics of Solids
Volume	28
Issue number	3-4
DOIs	https://doi.org/10.1016/0022-5096(80)90003-4
Publication status	Published - Aug 1980

Keywords

steel

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10.1016/0022-5096(80)90003-4

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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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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.

PY - 1980/8

Y1 - 1980/8

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.

KW - steel

UR - https://www.scopus.com/pages/publications/0019050746

U2 - 10.1016/0022-5096(80)90003-4

DO - 10.1016/0022-5096(80)90003-4

M3 - Article

SN - 0022-5096

VL - 28

SP - 191

EP - 200

JO - Journal of the Mechanics and Physics of Solids

JF - Journal of the Mechanics and Physics of Solids

IS - 3-4

ER -

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

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