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)

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.

• Language: English
• Keywords: low-cycle fatigue, element removal, XFEM, aluminium alloy, auxetic, honeycomb, strain-energy density
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2020
• Number of pages: Str. 1-13
• Numbering: Vol. 106 (102479)
• PID: 20.500.12556/RUL-113842
• UDC: 539.2:539.4(045)
• ISSN on article: 0167-8442
• DOI: 10.1016/j.tafmec.2020.102479
• COBISS.SI-ID: 22988310
• Publication date in RUL: 06.02.2020

Secondary language

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

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: J2-8186
• Name: Razvoj večnamenskih avksetičnih celičnih struktur