Investigating the potential of hierarchical non-self-similar discontinuous composites
Author(s)
Henry, J
Pimenta, soraia
Type
Conference Paper
Abstract
This work investigates the potential and the applicability of combining hierarchical and discontinuous microstructures to overcome the brittleness of man-made composites. Finite Element simulations were developed to model hierarchical “brick-and-mortar” composites, in which each brick
of the structure is itself made of an arrangement of bricks at a smaller scale. Then, optimal brick geometrieswere identified, manufactured and tested. The experimental results confirmedthe potential of such microstructures to dissipate energy stably through damage dispersion in the whole material, hence delaying damage localisation, and providing warning before failure. Finally, non-self-similar microstructureswere
identified and optimised to improve furtherthe tensile response of co
mposites. It was found that relaxing the constraints of self-similarity could
delay damage localisation even more, and increase both the strength and
the damage tolerance of hierarchical discontinuous composites.
of the structure is itself made of an arrangement of bricks at a smaller scale. Then, optimal brick geometrieswere identified, manufactured and tested. The experimental results confirmedthe potential of such microstructures to dissipate energy stably through damage dispersion in the whole material, hence delaying damage localisation, and providing warning before failure. Finally, non-self-similar microstructureswere
identified and optimised to improve furtherthe tensile response of co
mposites. It was found that relaxing the constraints of self-similarity could
delay damage localisation even more, and increase both the strength and
the damage tolerance of hierarchical discontinuous composites.
Date Issued
2017-08-20
Date Acceptance
2017-03-31
Citation
2017
Publisher
ICCM
Copyright Statement
© 2017 The Author(s)
Source
21st International Conference on Composite Materials (ICCM 2017)
Publication Status
Published
Start Date
2017-08-20
Finish Date
2017-08-25
Coverage Spatial
Xi'an, China