Paper Title:
Dynamic Visualization of Crack Tip Stress Field and Propagation Using the Mechano-Luminescence in SrAl2O4: (Eu,Dy,Nd)
  Abstract

The present investigation aimed at visualizing the propagating crack in a mechano-luminescence (ML) material, which enabled us to measure instantaneous R-curves and observe directly the bridging (shielding) stress in the fast-propagating crack system. The well-known ML compound, SrAl2O4:Eu,Dy,Nd, was adopted as a testing material. The crack initiation and growth from the mechanically machined sharp notch tip in the disc shaped compact tension (CT) specimen at a relatively fast loading rate were found to be associated with the extent of light emission around the crack. The in-situ measurement of crack length and applied load for 0.3 sec yielded an instantaneous R-curve at the conventional crack propagation speed.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
1121-1124
DOI
10.4028/www.scientific.net/MSF.475-479.1121
Citation
J. S. Kim, Y. N. Kwon, K. S. Sohn, "Dynamic Visualization of Crack Tip Stress Field and Propagation Using the Mechano-Luminescence in SrAl2O4: (Eu,Dy,Nd)", Materials Science Forum, Vols. 475-479, pp. 1121-1124, 2005
Online since
January 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hassan El Attaoui, Malika Saâdaoui, Jérôme Chevalier, Gilbert Fantozzi
793
Authors: Hassan El Attaoui, Malika Saâdaoui, Jérôme Chevalier, Gilbert Fantozzi
Abstract:A compliance function is used to quantify the shielding capacity of grain bridging, the degradation of which is the main cyclic fatigue...
449
Authors: Ji Sik Kim, Kee Sun Sohn, Yong Nam Kwon, Gap Su Ban, Kwang Ho Lee
2264
Authors: Makoto Katagiri, Akihiko Kumaki, Yoshito Izumi, H. Suzuki, Hideki Sekine
Abstract:By use of a probabilistic fracture model, a numerical simulation method for deformation and fracture behavior of whisker reinforced ceramics...
41
Authors: Yoshihisa Sakaida, Hajime Yoshida, Shotaro Mori
Abstract:Three types of polycrystalline alumina, one pressureless and two hot press sintered Al2O3, were used to examine the effects of the...
972