Prediction of static and low-cycle durability of porous cellular structures with positive and negative Poisson's ratios
Tomažinčič, Dejan (Author), Vesenjak, Matej (Author), Klemenc, Jernej (Author)

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The static and low-cycle durability of three planar cellular structures, hexagonal, auxetic and auxetic-chiral, have been compared. The three structures have the same critical cross-section and are made from an aluminium alloy Al7075-T651. The reference region of each structure is represented by a matrix of nine elementary shaped cells (3 rows by 3 columns). For each structure static and low-cycle fatigue experiments at different loading amplitudes were made. Numerical simulations were then performed for the same boundary conditions to predict the static and low-cycle fatigue durability. For this purpose a continuum damage mechanics approach with element removal was used in explicit dynamic simulations. The results of static simulations were also checked using the eXtended Finite Element Method (XFEM). All the numerical simulations were carried out using Abaqus. Good agreement was observed between the simulated and measured results for each of the three cellular structures.

Keywords:low-cycle fatigue, element removal, XFEM, aluminium alloy, auxetic, honeycomb, strain-energy density
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Number of pages:str. 1-13
Numbering:Vol. 106 (102479)
ISSN on article:0167-8442
DOI:10.1016/j.tafmec.2020.102479 Link is opened in a new window
COBISS.SI-ID:22988310 Link is opened in a new window
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Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:J2-8186
Name:Razvoj večnamenskih avksetičnih celičnih struktur

Secondary language

Keywords:malo-ciklično utrujanje, odstranitev elementov, aluminijeve zlitine, oksetični materiali, satovje, gostota energije specifične deformacije

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