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.
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 - http://www.scopus.com/inward/record.url?scp=0019050746&partnerID=8YFLogxK
U2 - 10.1016/0022-5096(80)90003-4
DO - 10.1016/0022-5096(80)90003-4
M3 - Article
VL - 28
SP - 191
EP - 200
JO - Journal of the Mechanics and Physics of Solids
JF - Journal of the Mechanics and Physics of Solids
SN - 0022-5096
IS - 3-4
ER -