Publication detail
Exploring Induced Heterogeneity in Elastic Discrete Mechanical Models
RAISINGER, J. ZHANG, Q. BOLANDER, J. ELIÁŠ, J.
Original Title
Exploring Induced Heterogeneity in Elastic Discrete Mechanical Models
Type
article in a collection out of WoS and Scopus
Language
English
Original Abstract
Mesoscale discrete lattice models offer a direct way to incorporate the heterogeneous microstructure of concrete and other geomaterials efficiently, using vector-based constitutive laws with homogeneous material parameters. These models exhibit stress oscillations, which, if deemed non-physical, can be suppressed using methods such as auxiliary stress projection or deviatoric-volumetric decomposition to produce homogeneous elastic stress fields. This study examines the elastic behavior of the homogenized models with controlled heterogeneity introduced via spatial randomization of material parameters, with an emphasis on the replication of the oscillations in the non-homogenized discrete model. Simulations with varying degrees of spatial correlation under different macroscopic loading conditions reveal that the original stress oscillations are best replicated with spatially independent randomization. However, none of the techniques fully reproduce the original oscillations.
Keywords
Discrete Model, Stress Oscillations, Concrete Mesoscale, Heterogeneity, Randomization, Elasticity
Authors
RAISINGER, J.; ZHANG, Q.; BOLANDER, J.; ELIÁŠ, J.
Released
25. 4. 2025
Publisher
IA-FraMCoS
Pages from
1
Pages to
7
Pages count
7
URL
Full text in the Digital Library
BibTex
@inproceedings{BUT197790,
author="Jan {Raisinger} and Qiwei {Zhang} and John {Bolander} and Jan {Eliáš}",
title="Exploring Induced Heterogeneity in Elastic Discrete Mechanical Models",
year="2025",
pages="1--7",
publisher="IA-FraMCoS",
doi="10.21012/FC12.1193",
url="https://framcos.org/FraMCoS-12/Full-Papers/1193.pdf"
}