Mechanics of Smart Structures

Mechanics of Smart Structures

Numerical and Experimental Investigation of the Quasi-Static Energy Absorption Behavior of a Hemispherical Truss with Porous Core in Honeycomb and Triangular Geometries

Document Type : Original Article

Authors
peyman Daneshi 1
َAbas Niknejad 2
khadije yousefi 3
1 yasuj univercity_department of mechanical engineering
2 1. Department of Mechanic Engineering, School of Engineering, Yasouj University, Yasouj, Iran
3 Department of Materials Science and Engineering, School of Engineering, Yasouj University, Yasouj, Iran
10.30511/jmms.2026.2083301.1035
Abstract
In this paper, the energy absorption behavior of a hemispherical truss with a porous core geometry in two cases, honeycomb and triangular, is investigated numerically and experimentally. For this purpose, a hemispherical truss with a honeycomb geometry is fabricated by connecting metal wires of a certain length and diameter. To increase the accuracy and quality of the laboratory-produced sample, a polymer template is fabricated using a 3D printer and placed between two rigid plates in a universal testing machine. At the start of the test, the movable rigid plate slowly moves towards the stationary rigid plate at a constant speed of 2 mm/min. In this process, which is carried out quasi-statically, the phenomenon of collapse and plastic deformation will occur in the truss. Finite element analysis of the same process is performed with 4 different wire lengths, 4 different wire diameters, 3 different materials, and 2 different geometries using Abaqus software. The results of the analyses show that the structure with triangular cell geometry, a wire diameter of 6 mm, a wire length of 30 mm, and an aluminum wire material has the best energy absorption in the studied range.
Keywords
Energy absorbtion
Semi_spherical truss
Quasi-static analysis
Mechanics of Smart Structures
Volume 2, Issue 2
Winter 2026