Affordable Access

The elasticity and failure of fluid-filled cellular solids: theory and experiment.

Authors
  • Warner, M
  • Thiel, B L
  • Donald, A M
Type
Published Article
Journal
Proceedings of the National Academy of Sciences of the United States of America
Publication Date
Feb 15, 2000
Volume
97
Issue
4
Pages
1370–1375
Identifiers
PMID: 10660680
Source
Medline
License
Unknown

Abstract

We extend and apply theories of filled foam elasticity and failure to recently available data on foods. The predictions of elastic modulus and failure mode dependence on internal pressure and on wall integrity are borne out by photographic evidence of distortion and failure under compressive loading and under the localized stress applied by a knife blade, and by mechanical data on vegetables differing only in their turgor pressure. We calculate the dry modulus of plate-like cellular solids and the cross over between dry-like and fully fluid-filled elastic response. The bulk elastic properties of limp and aging cellular solids are calculated for model systems and compared with our mechanical data, which also show two regimes of response. The mechanics of an aged, limp beam is calculated, thus offering a practical procedure for comparing experiment and theory. This investigation also thereby offers explanations of the connection between turgor pressure and crispness and limpness of cellular materials.

Report this publication

Statistics

Seen <100 times