Multiple strut-deformation patterns based analytical elastic modulus of sandwich BCC lattices

Yang, Yinghua; Shan, Meijuan; Zhao, Libin; Qi, Dexuan; Zhang, Jianyu

doi:10.1016/j.matdes.2019.107916

Cited by 54 publications

(31 citation statements)

References 25 publications

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“…Analytical approaches were developed for the simplified evaluation of cellular structure deformation behavior [ 2 , 42 ]. This study is using one of the newest approaches presented by Yang et al [ 43 ], which accounts for the unit cell length, nominal strut radius, and boundary conditions of the BCC lattice structure. Equations described in this study were based on the earlier Timoshenko beam theory and Euler–Bernoulli theory [ 19 ] neglecting shear deflection terms.…”

Section: Methodsmentioning

confidence: 99%

“…Because of higher computational requirements, a mesh sensitivity study was performed on a smaller lattice structure with a configuration of 3 × 3 × 3 unit cells to achieve reasonably accurate results [ 35 ]. During the study, the level of plateau stress and the convergence of the solution were validated through the series with different element sizes [ 3 , 37 , 43 ]. At least six elements were used to discretize the diameter of the strut for geometry with and without imperfections [ 19 , 26 ].…”

Section: Methodsmentioning

confidence: 99%

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Computational Approaches of Quasi-Static Compression Loading of SS316L Lattice Structures Made by Selective Laser Melting

et al. 2021

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Additive manufacturing methods (AM) allow the production of complex-shaped lattice structures from a wide range of materials with enhanced mechanical properties, e.g., high strength to relative density ratio. These structures can be modified for various applications considering a transfer of a specific load or to absorb a precise amount of energy with the required deformation pattern. However, the structure design requires knowledge of the relationship between nonlinear material properties and lattice structure geometrical imperfections affected by manufacturing process parameters. A detailed analytical and numerical computational investigation must be done to better understand the behavior of lattice structures under mechanical loading. Different computational methods lead to different levels of result accuracy and reveal various deformational features. Therefore, this study focuses on a comparison of computational approaches using a quasi-static compression experiment of body-centered cubic (BCC) lattice structure manufactured of stainless steel 316L by selective laser melting technology. Models of geometry in numerical simulations are supplemented with geometrical imperfections that occur on the lattice structure’s surface during the manufacturing process. They are related to the change of lattice struts cross-section size and actual shape. Results of the models supplemented with geometrical imperfections improved the accuracy of the calculations compared to the nominal geometry.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Computational Approaches of Quasi-Static Compression Loading of SS316L Lattice Structures Made by Selective Laser Melting

et al. 2021

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“…In this case, the finite element calculation process takes too long. Yang et al [27]- [28] . introduced the homogenization method to equivalent the lattice structure.…”

Section: Figure Lattice Compressor Impellermentioning

confidence: 99%

“…Based on the homogenization method of Yang [27]- [28] , the orthotropic linear elastic characteristics of a single lattice can be obtained approximately. This section considers loads in six directions, namely, loads in three tensile directions (x, y, z) and loads in three shear directions (XY, YZ, XZ), as shown in Figure 3.…”

Section: Figure Lattice Compressor Impellermentioning

confidence: 99%

Influence of Geometric Parameters On Mechanical Response of Concentric Cylinders With Centrosymmetric Lattice

Jia

Liu

et al. 2021

Preprint

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A design method of centrosymmetric lattice structure is proposed. The centrosymmetric lattice is applied to the lightweight design of concentric cylindrical structures. Combining homogenization method and finite element method, the advantage of centrosymmetric lattice concentric cylinder in reducing the maximum stress is verified, and the stress distribution of centrosymmetric lattice concentric cylinder is more uniform along the circumference; two kinds of centrosymmetric lattice solids are selected, and the parametric method is used to study the influence of three parameters on the static response of a centrosymmetric lattice concentric cylinder under axisymmetric surface pressure.The results show that the maximum stress of the central symmetric concentric cylinder is less than that of the parallel array lattice cylinder under axisymmetric surface pressure;the stress distribution of the cylinder under axisymmetric load is periodic along the circumference, and the stress distribution of the concentric cylinder is more uniform than that of the parallel array lattice while the centrosymmetric lattice is applied to the lightweight design of concentric cylinder; the maximum stress increases with the increase of inside thickness and decreases with the increase of outside thickness; the increase of lattice section size will reduce the stress of outside and lattice of concentric cylinder, while the maximum stress of inside is less affected by the size of lattice section.

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“…Azzouz et al [25] examined the role of the three lattice structures' shapes on the compression, shear and bending strength. Yang et al [26] provided an analytical method to divine the mechanical properties of sandwich lattice structures. In that study, a finite element model of the sandwich lattice structures was developed by using Timoshenko beam theory to predict deformation patterns.…”

Section: Introductionmentioning

confidence: 99%

Free Vibration Analysis of Composite Plate Stiffened by Lattice Structures

Güler¹

2021

European Journal of Science and Technology

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Free vibration behavior of laminated composite plates stiffened by different lattice structures is considered. To simulate free vibration, finite element models were created with Ansys Parametric Design Language (APDL). In the models, SHELL181 and BEAM181 elements were used to model laminated composite and lattice structures, respectively. The influence of the different stiffeners lattice structures on natural frequencies of the composite plate is examined for the clamped-free-clamped-free boundary condition. The results showed that the frequency parameters of the stiffened composite structures made of the L2-type lattice are higher than those composed of other lattice types. This study provides an exciting opportunity to advance our knowledge of the usage of lattice structures as stiffener structures for composite plates.

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Multiple strut-deformation patterns based analytical elastic modulus of sandwich BCC lattices

Cited by 54 publications

References 25 publications

Computational Approaches of Quasi-Static Compression Loading of SS316L Lattice Structures Made by Selective Laser Melting

Computational Approaches of Quasi-Static Compression Loading of SS316L Lattice Structures Made by Selective Laser Melting

Influence of Geometric Parameters On Mechanical Response of Concentric Cylinders With Centrosymmetric Lattice

Free Vibration Analysis of Composite Plate Stiffened by Lattice Structures

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