Elastic properties of isotropic discrete systems: Connections between geometric structure and Poisson's ratio

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F20%3APU135821" target="_blank" >RIV/00216305:26110/20:PU135821 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.ijsolstr.2019.12.012" target="_blank" >https://doi.org/10.1016/j.ijsolstr.2019.12.012</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijsolstr.2019.12.012" target="_blank" >10.1016/j.ijsolstr.2019.12.012</a>

Result language
angličtina
Original language name
Elastic properties of isotropic discrete systems: Connections between geometric structure and Poisson's ratio
Original language description
The use of discrete material representation in numerical models is advantageous due to the straightforward way it takes into account material heterogeneity and randomness, and the discrete and orientated nature of cracks. Unfortunately, it also restricts the macroscopic Poisson’s ratio and therefore narrows its applicability. The paper studies the Poisson’s ratio of a discrete model analytically. It derives theoretical limits for cases where the geometry of the model is completely arbitrary, but isotropic in the statistical sense. It is shown that the widest limits are obtained for models where normal directions of contacts between discrete units are parallel with the vectors connecting these units. Any deviation from parallelism causes the Poisson’s ratio limits to shrink. A comparison of the derived equations to the results of the actual numerical model is presented. It shows relatively large deviations from the theory because the fundamental assumptions behind the theoretical derivations are largely violated in systems with complex geometry. The real shrinking of the Poisson’s ratio limit is less severe compared to that which is theoretically derived.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20102 - Construction engineering, Municipal and structural engineering

Project
<a href="/en/project/GA19-12197S" target="_blank" >GA19-12197S: Coupled Discrete Meso-scale Model for Mechanics and Transport Phenomena in Concrete</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)