Journal Article

Observed failure modes of portland cement concrete cylinders are reported and discussed, and K//I//q (fracture toughness) as calculated from both the maximum load and from the load at the end of the linear part of the load versus crack mouth opening displacement (CMOD) plots are compared. Values of K//I//q have been found to increase with increasing initial notch length. It is concluded that this is a consequence of the more ductile behavior due to increased microcracking of specimens with longer notches relative to those with shorter ones. Maximum linear load and initial notch length yield K//I//q values less dependent on initial notch length, thus suggesting that the notched cylinder may provide a good standard fracture mechanics specimen to measure the fracture toughness associated with the onset of microcracking ahead of a macrocrack.

Duke Authors

Cited Authors

  • Ojdrovic, RP; Petroski, HJ

Published Date

  • October 1, 1987

Published In

Volume / Issue

  • ll3 / l0

International Standard Serial Number (ISSN)

  • 0733-9399

Citation Source

  • Scopus