Study on defect influence on elastic stifnesses and strength of auxetic cellular materials
Autor
Janus, Małgorzata
Marschalko, Marian
Opublikowane w
Technical Transactions
Numeracja
Vol. 123, iss. 1
Data wydania
2026
Miejsce wydania
Warsaw
Wydawca
Sciendo
Sekcja czasopisma
Civil Engineering and Transport
Język
angielski
ISSN
0011-4561
eISSN
2353-737X
DOI
https://doi.org/10.37705/TechTrans/e2026001
Słowa kluczowe
auxetic cellulars, defected lattice materials, statistical volume element
Abstrakt
The goal of this paper is to investigate the effects of randomly removed structural members of auxetic cellular material on the evaluation of elastic constants. Statistical volume element SVE size ensuring prescribed accuracy is adopted by giving relation with the size of representative volume element RVE considering number of statistical random defects. Statistical analysis is carried out within the Mathcad code. Inverted honeycomb structures with randomly removed structural members under the typical statistical boundary conditions are considered. The study is achieved by conducting finite element calculation by means of ABAQUS FEA of the auxetic structure leading to obtaining the stiffness matrix and strength. Timoshenko beam elements are used for material microstructure discretization with special attention paid on relation of mesh density with results accuracy. Influence of geometric microstructural parameters on examples of variety of inverted honeycomb microstructures is studied. As result dependence of residual effective elastic moduli and strength on defects density for each microstructure is specified.
