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Why are crack paths in concrete and mortar different from those in PMMA?

Melin, Solveig LU (1989) In Materials and Structures 22(1). p.23-27
Abstract
Experiments by Bazant and Pfeiffer on concrete and mortar seem to indicate that crack growth does not necessarily take place under Mode I conditions. In order to investigate the influence of the material, experiments were carried out in PMMA with similar geometry to that used by Bazant and Pfeiffer and a numerical simulation was made assuming Mode I crack growth. The experimental results for PMMA differ significantly from those in concrete and mortar, but agree closely with the result from the numerical simulations. The difference is believed to be explained by the fact that small-scale yielding conditions are not realized well enough in concrete and mortar. A fairly large region of small cracks probably influences the crack growth... (More)
Experiments by Bazant and Pfeiffer on concrete and mortar seem to indicate that crack growth does not necessarily take place under Mode I conditions. In order to investigate the influence of the material, experiments were carried out in PMMA with similar geometry to that used by Bazant and Pfeiffer and a numerical simulation was made assuming Mode I crack growth. The experimental results for PMMA differ significantly from those in concrete and mortar, but agree closely with the result from the numerical simulations. The difference is believed to be explained by the fact that small-scale yielding conditions are not realized well enough in concrete and mortar. A fairly large region of small cracks probably influences the crack growth direction. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Materials and Structures
volume
22
issue
1
pages
23 - 27
publisher
Springer
external identifiers
  • scopus:0024482501
ISSN
1359-5997
DOI
10.1007/BF02472691
language
English
LU publication?
yes
id
e5f95025-35ba-47f7-bf56-4ea4be7fa76d (old id 1515267)
date added to LUP
2010-01-07 11:39:39
date last changed
2017-01-01 07:40:19
@article{e5f95025-35ba-47f7-bf56-4ea4be7fa76d,
  abstract     = {Experiments by Bazant and Pfeiffer on concrete and mortar seem to indicate that crack growth does not necessarily take place under Mode I conditions. In order to investigate the influence of the material, experiments were carried out in PMMA with similar geometry to that used by Bazant and Pfeiffer and a numerical simulation was made assuming Mode I crack growth. The experimental results for PMMA differ significantly from those in concrete and mortar, but agree closely with the result from the numerical simulations. The difference is believed to be explained by the fact that small-scale yielding conditions are not realized well enough in concrete and mortar. A fairly large region of small cracks probably influences the crack growth direction.},
  author       = {Melin, Solveig},
  issn         = {1359-5997},
  language     = {eng},
  number       = {1},
  pages        = {23--27},
  publisher    = {Springer},
  series       = {Materials and Structures},
  title        = {Why are crack paths in concrete and mortar different from those in PMMA?},
  url          = {http://dx.doi.org/10.1007/BF02472691},
  volume       = {22},
  year         = {1989},
}