1. Mechanical Properties of Flexible TPU-Based 3D Printed Lattice Structures: Role of Lattice Cut Direction and Architecture
- Author
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Iurii Vozniak, Nadiya Sova, Dmytro Verbylo, V. A. Beloshenko, Andrei Voznyak, Yan Beygelzimer, Bogdan Savchenko, and Vyacheslav Chishko
- Subjects
flexible TPU ,Materials science ,Polymers and Plastics ,Organic chemistry ,Rigidity (psychology) ,General Chemistry ,Bending ,3D printing ,Plasticity ,mechanical properties ,Article ,internal architecture ,lattice material ,Thermoplastic polyurethane ,Lattice (module) ,QD241-441 ,Ultimate tensile strength ,Honeycomb ,Composite material ,Gyroid - Abstract
This study addresses the mechanical behavior of lattice materials based on flexible thermoplastic polyurethane (TPU) with honeycomb and gyroid architecture fabricated by 3D printing. Tensile, compression, and three-point bending tests were chosen as mechanical testing methods. The honeycomb architecture was found to provide higher values of rigidity (by 30%), strength (by 25%), plasticity (by 18%), and energy absorption (by 42%) of the flexible TPU lattice compared to the gyroid architecture. The strain recovery is better in the case of gyroid architecture (residual strain of 46% vs. 31%). TPUs with honeycomb architecture are characterized by anisotropy of mechanical properties in tensile and three-point bending tests. The obtained results are explained by the peculiarities of the lattice structure at meso- and macroscopic level and by the role of the pore space.
- Published
- 2021
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