Image-based numerical characterization and experimental validation of tensile behavior of octet-truss lattice structures

Korshunova, Nina; Alaimo, Gianluca; Hosseini, Seyyed Bahram; Carraturo, Massimo; Reali, Alessandro; Niiranen, Jarkko; Auricchio, Ferdinando; Rank, Ernst; Kollmannsberger, Stefan

doi:10.1016/j.addma.2021.101949

Cited by 33 publications

(21 citation statements)

References 47 publications

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“…Then this information can be used during analysis with every matrix corrected by a HU value of the current voxel. For a more detailed description of this methodology, the reader is referred to previous studies 5,6,12 …”

Section: Methodsmentioning

confidence: 99%

“…Numerical simulations can provide an effective, non‐disruptive tool to estimate fatigue life. Yet numerical characterization of LPBF lattices is not straightforward since the original as‐designed geometry can substantially differ from the actual, as‐built geometry 3–8 . Accordingly, numerical analysis computed on the as‐designed geometry might deliver results very different from experimental measurements 7 .…”

Section: Introductionmentioning

confidence: 99%

“…Our goal is to obtain an HCF life estimation in a simple tensile configuration. An immersed boundary method, namely, the finite cell method (FCM), with an implementation specifically tuned to work on μ‐CT images, 4–6 is used to directly perform numerical analyses on the as‐built geometry.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical evaluation of high cycle fatigue life for additively manufactured stainless steel 316L lattice structures: Preliminary considerations

Alaimo

Carraturo

Korshunova

et al. 2021

Mat Design & Process Comms

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Lattice components manufactured by selective laser melting processes are increasingly employed for producing high performing lightweight parts to be used in several industrial applications. However, the geometry at a submillimeter scale can exhibit not negligible differences with respect to the nominal design due to the high complexity of the manufacturing process. Accordingly, the mechanical behavior of lattice structures is strongly influenced by such process‐induced geometrical defects. Therefore, to numerically predict the fatigue behavior of lattice components, the as‐built geometry, as acquired, for instance, by means of micro‐computed tomography, should be considered. In this work, we employ an immersed boundary method, namely, the finite cell method, to develop a numerical framework suitable to compute fatigue life directly on an as‐built lattice geometry.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical evaluation of high cycle fatigue life for additively manufactured stainless steel 316L lattice structures: Preliminary considerations

Alaimo

Carraturo

Korshunova

et al. 2021

Mat Design & Process Comms

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show abstract

“…The performance of lattice materials will be affected by microscopic defects, which inevitably appear in the lattice structure during the additive manufacturing 6–9 . Introducing all defects in the finite element model can improve the accuracy of the analysis results obviously 10–14 . On the other hand, as mentioned in the research, 15 in the lattice materials manufactured by additive manufacturing, there are obvious differences in the micro structures of different parts, which will make the structural response have obvious nonlinear effects.…”

Section: Introductionmentioning

confidence: 95%

“…[6][7][8][9] Introducing all defects in the finite element model can improve the accuracy of the analysis results obviously. [10][11][12][13][14] On the other hand, as mentioned in the research, 15 in the lattice materials manufactured by additive manufacturing, there are obvious differences in the micro structures of different parts, which will make the structural response have obvious nonlinear effects. However, the considerations of defects or nonlinear effect are complex and difficult.…”

Section: Introductionmentioning

confidence: 96%

Multiscale analysis for 3D lattice structures based on parallel computing

Yan

Huo

et al. 2021

Numerical Meth Engineering

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In this study, a parallel framework for the multiscale analysis of three‐dimensional lattice structures is developed. The established parallel framework performs the multiscale analysis using the extended multiscale finite element method (EMsFEM) in a parallel environment provided by the portable and extensible toolkit for scientific computation (PETSc), which is a high‐performance parallel scientific computing library. To realize this aim, we developed several modifications of the original EMsFEM method and adopted some routines from PETSc. Through numerical examples, the efficiency and accuracy of the proposed parallel computing framework were verified first. Then, the parallel acceleration ratio and parallel efficiency of the proposed parallel framework were studied. The proposed parallel computing framework shows good efficiency and can be used to deal with the analysis of large‐scale lattice structures.

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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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Image-based numerical characterization and experimental validation of tensile behavior of octet-truss lattice structures

Cited by 33 publications

References 47 publications

Numerical evaluation of high cycle fatigue life for additively manufactured stainless steel 316L lattice structures: Preliminary considerations

Numerical evaluation of high cycle fatigue life for additively manufactured stainless steel 316L lattice structures: Preliminary considerations

Multiscale analysis for 3D lattice structures based on parallel computing

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

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