Proposed auxetic cluster designs for lightweight structural beams with improved load bearing capacity

Menon, Hrishikesh G.; Dutta, Shammo; Krishnan, Aravind; Hariprasad, M. P.; Shankar, Balakrishnan

doi:10.1016/j.engstruct.2022.114241

Cited by 27 publications

(7 citation statements)

References 42 publications

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“…Here, the horizontally-oriented auxetic cylinders demonstrate Poisson’s ratios varying from 0.2 to 1.1 based on different combinations of the design features (h, v and t). Such a wide range of Poisson’s ratios for the different meshes and cylinders offers unique applications such as in actuators ( 6, 7 ), large structural components ( 8, 9 ), implants ( 25, 26 ) or organ-specific patches ( 3, 4 ).…”

Section: Resultsmentioning

confidence: 99%

“…Such auxetic shapes have also recently paved the way to a new range of patches and tissue grafts for regenerative applications such as those repairing cardiac ( 3 ) and pulmonary pathologies ( 4 ), where auxetic patches allow easy conformation to organ deformation and outperform non-auxetic patches ( 5 ). In addition, auxetic structures are increasingly being used as actuators ( 6, 7 ) or load-bearing structures ( 8, 9 ). Furthermore, advanced CAD and CM tools are increasingly being used in tissue engineering to design complex perfusable structures, such as perfusable vascularized biomimetic tissue models for studying biogenesis and disease progression and treatment ( 10, 11 ).…”

Section: Introductionmentioning

confidence: 99%

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Synergizing algorithmic design, photoclick chemistry and multi-material volumetric printing for accelerating complex shape engineering

Chansoria

Rütsche

Wang

et al. 2022

Preprint

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Accelerating the designing and manufacturing of complex shapes has been a driving factor of modern industrialization. This has led to numerous advances in computational design and modeling and novel additive manufacturing (AM) techniques that can generate and fabricate complex shapes for bespoke applications. By combining new new coding-based design approach with advanced AM techniques for high-throughput fabrication, we envision a new approach to transform the way we design and fabricate complex shapes. Here, we demonstrate an algorithmic voxel-based approach, which can rapidly generate and analyze porous structures, auxetic meshes and cylinders, or perfusable constructs. We use this design scheme in conjunction with new approaches for multi-material volumetric printing based on thiol-ene photoclick chemistry to rapidly fabricate complex heterogeneous structures. Collectively, the new design and fabrication technique we demonstrate can be used across a wide-spectrum of products such as actuators, biomedical implants and grafts, or tissue and disease models.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synergizing algorithmic design, photoclick chemistry and multi-material volumetric printing for accelerating complex shape engineering

Chansoria

Rütsche

Wang

et al. 2022

Preprint

View full text Add to dashboard Cite

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“…Of these, the re-entrant meshes demonstrate the widest range of Poisson's ratios (from 0.1 to −10.9) based on the different combinations of the design features (n1, n2 and t). Such a wide range of Poisson's ratios for the different meshes and cylinders offers unique applications such as in actuators, [6,7] structural components, [8,9] implants, [25,26] or organspecific patches. [3,4] We also validated the computational estimates within a tensile testing apparatus (Figure 2F) using the selected volumetrically printed meshes (Figure 2C).…”

Section: Algorithmically Defined Computational Models For Rapidly Scr...mentioning

confidence: 99%

“…[5] In addition, auxetic structures are increasingly being used as actuators or loadbearing structures. [6][7][8][9] Furthermore, advanced CAD and CM tools are increasingly being used in tissue engineering to design complex perfusable structures, such as perfusable vascularized biomimetic tissue models for studying biogenesis and disease progression and treatment. [10,11] Unfortunately, to this date, CAD and CM still largely require manually defining the complex geometrical relationships and boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Synergizing Algorithmic Design, Photoclick Chemistry and Multi‐Material Volumetric Printing for Accelerating Complex Shape Engineering

et al. 2023

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The field of biomedical design and manufacturing has been rapidly evolving, with implants and grafts featuring complex 3D design constraints and materials distributions. By combining a new coding‐based design and modeling approach with high‐throughput volumetric printing, a new approach is demonstrated to transform the way complex shapes are designed and fabricated for biomedical applications. Here, an algorithmic voxel‐based approach is used that can rapidly generate a large design library of porous structures, auxetic meshes and cylinders, or perfusable constructs. By deploying finite cell modeling within the algorithmic design framework, large arrays of selected auxetic designs can be computationally modeled. Finally, the design schemes are used in conjunction with new approaches for multi‐material volumetric printing based on thiol‐ene photoclick chemistry to rapidly fabricate complex heterogeneous shapes. Collectively, the new design, modeling and fabrication techniques can be used toward a wide spectrum of products such as actuators, biomedical implants and grafts, or tissue and disease models.

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“…For instance, the “quasi‐2D” auxetic beams obtained by such extrusion were employed in the design of a real bridge, which demonstrated the outperformance of the auxetic beams compared to conventional beams in load‐bearing capability. [ 35 ] Additionally, the flexural bending properties of such 3D printed auxetic sandwich structures have been studied, focusing on the energy absorption capacity of re‐entrant structures. [ 36 ] However, these 3D structures exhibit only in‐plane auxeticity (i.e., no NPR effect in the out‐of‐plane direction).…”

Section: Introductionmentioning

confidence: 99%

Study of Mechanical Properties of a New 3D Re‐Entrant Lattice Auxetic Structure Under Bending

et al. 2023

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Herein, the mechanical behaviors of a new 3D re‐entrant lattice auxetic structure under bending are investigated. When a classical 3D re‐entrant lattice auxetic structure is subjected to uniaxial loading, only one 2D structural component can sustain the load, which limits the capability of the auxetic structure. By changing the connection mode of 2D components, a new 3D re‐entrant lattice auxetic structure that can exhibit both in‐ and out‐of‐plane negative Poisson's ratios is proposed. To investigate the bending response of the new structure, specimens with three different design parameters are additively manufactured, and their mechanical properties are studied with the four‐point bending test and finite element analysis. Compared to the classical 3D re‐entrant lattice structure, the new 3D re‐entrant lattice structure exhibits lower initial peak stress and higher energy absorption capacity. The underlying mechanism may be closely associated with the unique deformation pattern of auxetic structures under bending. The new re‐entrant auxetic structure expands the design space of 3D auxetic structures, especially for energy absorption and protection in impact scenarios.

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Proposed auxetic cluster designs for lightweight structural beams with improved load bearing capacity

Cited by 27 publications

References 42 publications

Synergizing algorithmic design, photoclick chemistry and multi-material volumetric printing for accelerating complex shape engineering

Synergizing algorithmic design, photoclick chemistry and multi-material volumetric printing for accelerating complex shape engineering

Synergizing Algorithmic Design, Photoclick Chemistry and Multi‐Material Volumetric Printing for Accelerating Complex Shape Engineering

Study of Mechanical Properties of a New 3D Re‐Entrant Lattice Auxetic Structure Under Bending

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