TY - JOUR
T1 - BEM analysis of a cylindrical three-point bend specimen with a chevron crack for fracture toughness test of rock
AU - Hayashi, Kazuo
AU - Ono, Akihiko
AU - Abe, Hiroyuki
PY - 1989
Y1 - 1989
N2 - The stress intensity factor along the periphery of a chevron crack in a cylindrical three point bend specimen (CB) is evaluated by BEM for the establishment of a rock fracture toughness test using CB specimens. So far, in the test, the stress intensity factor is assumed to be constant along the front edge of the crack and is evaluated by the compliance method. It is revealed by the present analysis that the stress intensity factor takes a minimum value at the center of the front edge so that the crack growth during the fracture toughness test makes the front edge of the crack concave. It is also shown that the stress intensity factor evaluated by the compliance method is larger than that of the concave crack with a homogeneous distribution of the stress intensity factor along the front edge. This implies that the fracture toughness test leads to overestimation.
AB - The stress intensity factor along the periphery of a chevron crack in a cylindrical three point bend specimen (CB) is evaluated by BEM for the establishment of a rock fracture toughness test using CB specimens. So far, in the test, the stress intensity factor is assumed to be constant along the front edge of the crack and is evaluated by the compliance method. It is revealed by the present analysis that the stress intensity factor takes a minimum value at the center of the front edge so that the crack growth during the fracture toughness test makes the front edge of the crack concave. It is also shown that the stress intensity factor evaluated by the compliance method is larger than that of the concave crack with a homogeneous distribution of the stress intensity factor along the front edge. This implies that the fracture toughness test leads to overestimation.
UR - http://www.scopus.com/inward/record.url?scp=0024699768&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0024699768&partnerID=8YFLogxK
U2 - 10.1299/jsmea1988.32.3_427
DO - 10.1299/jsmea1988.32.3_427
M3 - Article
AN - SCOPUS:0024699768
VL - 32
SP - 427
EP - 431
JO - JSME International Journal, Series 1: Solid Mechanics, Strength of Materials
JF - JSME International Journal, Series 1: Solid Mechanics, Strength of Materials
SN - 1340-8046
IS - 3
ER -