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"
}