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

AUTOR(ES)

Warner, M.

FONTE

The National Academy of Sciences

RESUMO

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.

Documentos Relacionados

• Transient stability of empty and fluid-filled cylindrical shells
• Mass transfer inside oblate spheroidal solids: modelling and simulation
• Crystal Morphology Engineering of Pharmaceutical Solids: Tabletting Performance Enhancement
• Quantum dot artificial solids: Understanding the static and dynamic role of size and packing disorder
• Archimedean solids: Transition metal mediated rational self-assembly of supramolecular-truncated tetrahedra