RT Journal Article
T1 Some experimental observations of crack-tip mechanics with displacement data
A1 López-Crespo, Pablo
A1 Mokhtari, M
A1 Moreno-Morales, María Belén
A1 Zanganeh, M
K1 Materiales - Fatiga
AB In the past two decades, crack-tip mechanics has been increasingly studied with full-fieldtechniques. Within these techniques, Digital Image Correlation (DIC) has been most widely used due to itsmany advantages, to extract important crack-tip information, including Stress Intensity Factor (SIF), CrackOpening Displacement, J-integral, T-stress, closure level, plastic zone size, etc. However, little information isgiven in the literature about the experimental setup that provides best estimations for the different parameters.The current work aims at understanding how the experimental conditions used in DIC influence the crack-tipinformation extracted experimentally. The influence of parameters such as magnification factor, size of theimages, position of the images with respect the crack-tip and size of the subset used in the correlation is studied.The influence is studied in terms of SIF and T-stress by using Williams’ model. The concept of determination ofthe K-dominance zone from experimental data has also explored. In this regard, cyclic loading on a fatiguecrack in a compact tension (CT) specimen, made of aluminium 2024-T351 alloy, has been applied and thesurface deformation ahead of the crack tip has been examined. The comparison between theoretical andexperimental values of KI showed that the effect of subset size on the measured KI is negligible compared tothe effect of size of the image.
PB GIF
YR 2015
FD 2015-05-01
LK http://hdl.handle.net/10630/10074
UL http://hdl.handle.net/10630/10074
LA eng
NO M. Mokhtari et alii, Frattura ed Integrità Strutturale, 33 (2015) 143-150;  DOI: 10.3221/IGF-ESIS.33.18
NO Estudio de la mecánica en el vértice de la grieta mediante datos de desplazamiento.
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026