TY - JOUR
T1 - Tε* integral as a crack growth criterion
AU - Omori, Yoshika
AU - Kobayashi, Albert S.
AU - Okada, Hiroshi
AU - Atluri, Satya N.
AU - Tan, Paul W.
PY - 1998/7
Y1 - 1998/7
N2 - Tε*-integral values associated with stable crack growth in thin 2024-T3 aluminum single edge notched (SEN), central notched (CN) and compact (CT) specimens were evaluated experimentally and numerically along a near-crack contour, Γε, which elongated with crack extension. The surface displacement fields, which were determined by Moiré interferometry and by an elastic-plastic finite element (FE) simulation of the measured stable crack growth, were used to determine the Tε*. The experimentally and numerically determined Tε*'s and those of the crack tip opening angles (CTOA), were in excellent agreements with each other. Variations in Tε* and CTOA with crack extension of all three specimens were in essential agreement, albeit the continually increasing Tε* of the SEN specimen.
AB - Tε*-integral values associated with stable crack growth in thin 2024-T3 aluminum single edge notched (SEN), central notched (CN) and compact (CT) specimens were evaluated experimentally and numerically along a near-crack contour, Γε, which elongated with crack extension. The surface displacement fields, which were determined by Moiré interferometry and by an elastic-plastic finite element (FE) simulation of the measured stable crack growth, were used to determine the Tε*. The experimentally and numerically determined Tε*'s and those of the crack tip opening angles (CTOA), were in excellent agreements with each other. Variations in Tε* and CTOA with crack extension of all three specimens were in essential agreement, albeit the continually increasing Tε* of the SEN specimen.
KW - Crack
KW - Integral values
KW - Surface
UR - http://www.scopus.com/inward/record.url?scp=0032067993&partnerID=8YFLogxK
U2 - 10.1016/S0167-6636(97)00059-8
DO - 10.1016/S0167-6636(97)00059-8
M3 - Article
AN - SCOPUS:0032067993
SN - 0167-6636
VL - 28
SP - 147
EP - 154
JO - Mechanics of Materials
JF - Mechanics of Materials
IS - 1-4
ER -