Multi-Material Topology Optimization Using Variable Density Lattice Structures for Additive Manufacturing

Venugopal, Vysakh; Hertlein, Nathan; Anand, Sam

doi:10.1016/j.promfg.2021.06.089

Cited by 10 publications

(2 citation statements)

References 19 publications

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“…A modified version of the SIMP method has been developed by Venugopal et al [29], which connects it with a surrogate model describing the elasticity tensor of each finite element based on its density value.…”

Section: Multi-materials Tomentioning

confidence: 99%

Micro- and Macro-Scale Topology Optimization of Multi-Material Functionally Graded Lattice Structures

Santos,

Sohouli,

Suleman

2024

J. Compos. Sci.

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Lattice structures are becoming an increasingly attractive design approach for the most diverse engineering applications. This increase in popularity is mainly due to their high specific strength and stiffness, considerable heat dissipation, and relatively light weight, among many other advantages. Additive manufacturing techniques have made it possible to achieve greater flexibility and resolution, enabling more complex and better-performing lattice structures. Unrestricted material unit cell designs are often associated with high computational power and connectivity problems, and highly restricted lattice unit cell designs may not reach the optimal desired properties despite their lower computational cost. This work focuses on increasing the flexibility of a restricted unit cell design while achieving a lower computational cost. It is based on a two-scale concurrent optimization of the lattice structure, which involves simultaneously optimizing the topology at both the macro- and micro-scales to achieve an optimal topology. To ensure a continuous optimization approach, surrogate models are used to define material and geometrical properties. The elasticity tensors for a lattice unit cell are obtained using an energy-based homogenization method combined with voxelization. A multi-variable parameterization of the material unit cell is defined to allow for the synthesis of functionally graded lattice structures.

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Section: Multi-materials Tomentioning

confidence: 99%

Micro- and Macro-Scale Topology Optimization of Multi-Material Functionally Graded Lattice Structures

Santos,

Sohouli,

Suleman

2024

J. Compos. Sci.

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“…The unit cell strut with the tapered shape, 17 the curved shape, 24 and the arched shape 25 lattice structures are developed and proven effective for improving SEA. On the other hand, multimaterial lattices, 26 multilayered lattices, 27 layer-wise density gradient lattices, 28 and nature-inspired lattice structures 29 are established to improve the properties and efficiency of the structure.…”

Section: Introductionmentioning

confidence: 99%

Characterization of penetrate and interpenetrate tessellated cellular lattice structures for energy absorption

Ashok¹,

Mertens²,

Bahubalendruni³

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Recently, cellular lattice structures are gaining research attention due to their lightweight and high energy absorption. Interpenetrated lattice structure is a combination of two or more regular lattices with the same volume and without any contact at the unit level. The interpenetrated tessellated lattice (I-PTL) structures are better known for load sharing and energy absorption applications. In the current research, regular unit cell lattices such as cubic, beam lattice, body-centered cubic, and octahedron are considered to fabricate penetrated and interpenetrated cellular lattice structures and tested for energy absorption on quasi-static loading. These structures were fabricated using a Vat polymerization three-dimensional printer and tested as per the American Society for Testing and Materials (ASTM) standards, and the results were compared with numerical simulation using ANSYS. The penetrated tessellated lattice structural and I-PTL behavior deliver energy transfer controlled by the surface and solid joint interactions. The enhancement in mechanical properties is observed with the controllable compliance and specific energy absorption of the lattice structure.

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Multi-scale and multi-material topology optimization of gradient lattice structures using surrogate models

Costa¹,

Sohouli

Suleman

2022

Composite Structures

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Multi-Material Topology Optimization Using Variable Density Lattice Structures for Additive Manufacturing

Cited by 10 publications

References 19 publications

Micro- and Macro-Scale Topology Optimization of Multi-Material Functionally Graded Lattice Structures

Micro- and Macro-Scale Topology Optimization of Multi-Material Functionally Graded Lattice Structures

Characterization of penetrate and interpenetrate tessellated cellular lattice structures for energy absorption

Multi-scale and multi-material topology optimization of gradient lattice structures using surrogate models

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