The effect of a negative Poisson's ratio on thermal stresses in cellular metallic structures

Journal article
(Original article)


Publication Details

Author(s): Adler L, Warmuth F, Lodes M, Osmanlic F, Körner C
Journal: Smart Materials and Structures
Publisher: Institute of Physics Publishing
Publication year: 2016
Volume: 25
Journal issue: 11
ISSN: 1361-665X
Language: English


Abstract


To investigate the influence of auxetic behavior on thermally induced stresses, finite element analysis simulations of the displacement and stress fields in locally heated three dimensional auxetic and cubic structures are compared. The simulations were carried out in Comsol for a cubic as well as a chiral array of 30 mm length in each spatial dimension (3 × 3 × 3 unit cells). The center cells of these arrays were heated for 20 s. For two boundary conditions (free and clamped), deformation mechanisms are analyzed. It is found, that the auxetic behavior can effectively reduce thermal stresses by internal node rotation and strut bending, especially for constrained (clamped) boundary conditions. A stress reduction of a factor of 3.3 in comparisons to a simple cubic cell array could be evaluated.



FAU Authors / FAU Editors

Adler, Lucas
Zentralinstitut für Neue Materialien und Prozesstechnik
Körner, Carolin Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Lodes, Matthias Dr.-Ing.
Zentralinstitut für Neue Materialien und Prozesstechnik
Osmanlic, Fuad
Zentralinstitut für Neue Materialien und Prozesstechnik
Warmuth, Franziska
Zentralinstitut für Neue Materialien und Prozesstechnik


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Adler, L., Warmuth, F., Lodes, M., Osmanlic, F., & Körner, C. (2016). The effect of a negative Poisson's ratio on thermal stresses in cellular metallic structures. Smart Materials and Structures, 25(11). https://dx.doi.org/10.1088/0964-1726/25/11/115038

MLA:
Adler, Lucas, et al. "The effect of a negative Poisson's ratio on thermal stresses in cellular metallic structures." Smart Materials and Structures 25.11 (2016).

BibTeX: 

Last updated on 2018-19-04 at 03:52