A novel 3D compression-torsion mechanical metamaterial with cubic cells based on askew star mechanism: Design, simulation, and experimental validations
Amin Montazeri, Fardad Homafar, Maryam Mahnama
Abstract
An innovative design of a three-dimensional compression-torsion metamaterial converting uniaxial compression (along any principal axis) to torsion is proposed. The compression-torsion properties of the unit cell and multicell structures are explored via finite element simulations and experiments. The effect of the geometrical parameters of the unit cell on its performance is studied, and the best model is used to assemble the multicell structures. The effects of aspect ratio (longitudinal cell number per transverse cell number) and axial strain on the torsion angle of metamaterial are investigated indicating that the torsion angle is proportional to axial strain and aspect ratio.
Topics & Concepts
Torsion (gastropod)Materials scienceStar (game theory)MetamaterialMechanism (biology)Structural engineeringMechanical engineeringEngineeringPhysicsMathematicsMathematical analysisOptoelectronicsMedicineSurgeryQuantum mechanicsAdvanced Materials and MechanicsCellular and Composite StructuresFluid Dynamics Simulations and Interactions