Superelastic Behavior of Additively Manufactured Nylon-12 Lattice Structures

Kankanamge, Udesh M. H. U.; Mohamed, Omar Ahmed; Xu, Wei

doi:10.1007/s11665-021-06086-4

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…The capabilities of AM technologies have also allowed various researchers to build lattices with elevated levels of complexity. Indeed, several works have investigated enclosed truss-based unit cell geometries based on cubic, diamond, triangular, pyramidal, body-centered cubic (BBC), dodecahedron, octahedral, tetrahedron, and tetrakaidecahedron or Kelvin cell [ 5 , 7 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ], among many other geometries. Surface-based geometries and triply periodic minimal surface (TPMS) configurations as a spherical shell, gyroid, IWP, OCTO, Schwarz, TPMS diamond, and TPMS primitive have also been studied [ 5 , 7 , 14 , 15 , 29 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

Low Impact Velocity Modeling of 3D Printed Spatially Graded Elastomeric Lattices

et al. 2022

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Additive manufacturing technologies have facilitated the construction of intricate geometries, which otherwise would be an extenuating task to accomplish by using traditional processes. Particularly, this work addresses the manufacturing, testing, and modeling of thermoplastic polyurethane (TPU) lattices. Here, a discussion of different unit cells found in the literature is presented, along with the based materials used by other authors and the tests performed in diverse studies, from which a necessity to improve the dynamic modeling of polymeric lattices was identified. This research focused on the experimental and numerical analysis of elastomeric lattices under quasi-static and dynamic compressive loads, using a Kelvin unit cell to design and build non-graded and spatially side-graded lattices. The base material behavior was fitted to an Ogden 3rd-order hyperelastic material model and used as input for the numerical work through finite element analysis (FEA). The quasi-static and impact loading FEA results from the lattices showed a good agreement with the experimental data, and by using the validated simulation methodology, additional special cases were simulated and compared. Finally, the information extracted from FEA allowed for a comparison of the performance of the lattice configurations considered herein.

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Section: Introductionmentioning

confidence: 99%

Low Impact Velocity Modeling of 3D Printed Spatially Graded Elastomeric Lattices

et al. 2022

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A Review on Factors Affecting the Mechanical Properties of Additively-Manufactured Lattice Structures

Liu

Chen

Zhao

2023

J. of Materi Eng and Perform

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Impact Performance of 3D Printed Spatially Varying Elastomeric Lattices

et al. 2023

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Additive manufacturing is catalyzing a new class of volumetrically varying lattice structures in which the dynamic mechanical response can be tailored for a specific application. Simultaneously, a diversity of materials is now available as feedstock including elastomers, which provide high viscoelasticity and increased durability. The combined benefits of complex lattices coupled with elastomers is particularly appealing for anatomy-specific wearable applications such as in athletic or safety equipment. In this study, Siemens’ DARPA TRADES-funded design and geometry-generation software, Mithril, was leveraged to design vertically-graded and uniform lattices, the configurations of which offer varying degrees of stiffness. The designed lattices were fabricated in two elastomers using different additive manufacturing processes: (a) vat photopolymerization (with compliant SIL30 elastomer from Carbon) and (b) thermoplastic material extrusion (with Ultimaker™ TPU filament providing increased stiffness). Both materials provided unique benefits with the SIL30 material offering compliance suitable for lower energy impacts and the Ultimaker™ TPU offering improved protection against higher impact energies. Moreover, a hybrid lattice combination of both materials was evaluated and demonstrated the simultaneous benefits of each, with good performance across a wider range of impact energies. This study explores the design, material, and process space for manufacturing a new class of comfortable, energy-absorbing protective equipment to protect athletes, consumers, soldiers, first responders, and packaged goods.

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Superelastic Behavior of Additively Manufactured Nylon-12 Lattice Structures

Cited by 3 publications

References 26 publications

Low Impact Velocity Modeling of 3D Printed Spatially Graded Elastomeric Lattices

Low Impact Velocity Modeling of 3D Printed Spatially Graded Elastomeric Lattices

A Review on Factors Affecting the Mechanical Properties of Additively-Manufactured Lattice Structures

Impact Performance of 3D Printed Spatially Varying Elastomeric Lattices

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