Publication detail
On the Crack Tip Shielding in Particle Reinforced Composites
HORNÍKOVÁ, J. ŠANDERA, P. POKLUDA, J.
Czech title
Ke stínění špice trhliny v částicově zpevněných kompositech
English title
On the Crack Tip Shielding in Particle Reinforced Composites
Type
journal article - other
Language
en
Original abstract
The paper is focused on crack-tip shielding effects caused by crack deflection (tilting) processes in particle reinforced composites. A numerical analysis by means of the ANSYS code was employed in order to assess these effects caused by rigid particles and holes in the matrix. As the first step, the effective stress intensity factor Keff was calculated for many crack tip positions in front, and in between, two particles of the same kind. In spite of a significant crack tip tilting, the spherical holes induce a slight increase in the Keff factor (anti-shielding). On the other hand, the rigid particles cause a significant decrease in the Keff-value (shielding), while leaving the crack practically unaffected. In the second step, the effect of particles in the wake of the crack tip will be analyzed in order to obtain a complex picture of shielding.
Czech abstract
Ke stínění špice trhliny v částicově zpevněných kompositech
English abstract
The paper is focused on crack-tip shielding effects caused by crack deflection (tilting) processes in particle reinforced composites. A numerical analysis by means of the ANSYS code was employed in order to assess these effects caused by rigid particles and holes in the matrix. As the first step, the effective stress intensity factor Keff was calculated for many crack tip positions in front, and in between, two particles of the same kind. In spite of a significant crack tip tilting, the spherical holes induce a slight increase in the Keff factor (anti-shielding). On the other hand, the rigid particles cause a significant decrease in the Keff-value (shielding), while leaving the crack practically unaffected. In the second step, the effect of particles in the wake of the crack tip will be analyzed in order to obtain a complex picture of shielding.
Keywords in English
metallic inclusions, toughening effect, stress intensity factor, crack tip shielding
RIV year
2005
Released
01.01.2005
ISSN
0255-5476
Journal
Materials Science Forum
Volume
482
Pages from–to
311–314
Pages count
4
BIBTEX
@article{BUT45572,
author="Jana {Horníková} and Pavel {Šandera} and Jaroslav {Pokluda},
title="On the Crack Tip Shielding in Particle Reinforced Composites",
journal="Materials Science Forum",
year="2005",
volume="482",
month="January",
pages="311--314",
issn="0255-5476"
}