Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels

Athina Kontopoulou; Riccardo Manno; Bing Zhang; Fabrizio  Scarpa; Giuliano Allegri

doi:10.5075/epfl-298799_978-2-9701614-0-0

Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels

Athina Kontopoulou^*, Riccardo Manno, Bing Zhang, Fabrizio Scarpa, Giuliano Allegri

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

Abstract

The evolution of additive manufacturing techniques has vastly increased the design space of lattice structures, making it possible to create stiffer and lighter ones. This work deals with the evolutionary shape and size optimization of lattice structures, using a genetic algorithm (GA). A modelling framework involving finite element (FE) homogenization of representative volume elements (RVE) under strain-controlled Periodic Boundary Conditions (PBCs) is employed. Several designs of lattice structures were optimized with this approach. These designs were obtained superimposing basic lattice unit cells, such as body-centred cubic (BCC), face-centred cubic (FCC), simple cubic (SC) and octahedral, considering additive manufacturing constraints. The optimization objective was the maximisation of the specific compressive stiffness of the lattices, limiting the maximum relative density to 0.30. The optimized led to a five-fold increase of the specific compressive stiffness.

Original language	English
Title of host publication	Proceedings of the 20th European Conference on Composite Materials, ECCM20
Editors	Anastasios P. Vassilopoulos, Véronique Michaud
Publisher	Composite Construction Laboratory (CCLab)
Pages	27-34
Number of pages	8
Volume	5
ISBN (Electronic)	9782970161400
DOIs	https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0
Publication status	Published - 2 Jul 2022
Event	20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022 - Lausanne, Switzerland Duration: 26 Jun 2022 → 30 Jun 2022

Conference

Conference	20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022
Country/Territory	Switzerland
City	Lausanne
Period	26/06/22 → 30/06/22

Bibliographical note

Publisher Copyright:
© 2022 Kontopoulou et al.

Keywords

Lattice structures
Homogenization
Finite Element method
EVOLUTIONARY OPTIMIZATION

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10.5075/epfl-298799_978-2-9701614-0-0Licence: CC BY-NC

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Kontopoulou, A., Manno, R., Zhang, B., Scarpa, F., & Allegri, G. (2022). Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels. In A. P. Vassilopoulos, & V. Michaud (Eds.), Proceedings of the 20th European Conference on Composite Materials, ECCM20 (Vol. 5, pp. 27-34). Composite Construction Laboratory (CCLab). https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0

Kontopoulou, Athina ; Manno, Riccardo ; Zhang, Bing et al. / Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels. Proceedings of the 20th European Conference on Composite Materials, ECCM20. editor / Anastasios P. Vassilopoulos ; Véronique Michaud. Vol. 5 Composite Construction Laboratory (CCLab), 2022. pp. 27-34

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abstract = "The evolution of additive manufacturing techniques has vastly increased the design space of lattice structures, making it possible to create stiffer and lighter ones. This work deals with the evolutionary shape and size optimization of lattice structures, using a genetic algorithm (GA). A modelling framework involving finite element (FE) homogenization of representative volume elements (RVE) under strain-controlled Periodic Boundary Conditions (PBCs) is employed. Several designs of lattice structures were optimized with this approach. These designs were obtained superimposing basic lattice unit cells, such as body-centred cubic (BCC), face-centred cubic (FCC), simple cubic (SC) and octahedral, considering additive manufacturing constraints. The optimization objective was the maximisation of the specific compressive stiffness of the lattices, limiting the maximum relative density to 0.30. The optimized led to a five-fold increase of the specific compressive stiffness.",

keywords = "Lattice structures, Homogenization, Finite Element method, EVOLUTIONARY OPTIMIZATION",

author = "Athina Kontopoulou and Riccardo Manno and Bing Zhang and Fabrizio Scarpa and Giuliano Allegri",

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Kontopoulou, A, Manno, R, Zhang, B, Scarpa, F & Allegri, G 2022, Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels. in AP Vassilopoulos & V Michaud (eds), Proceedings of the 20th European Conference on Composite Materials, ECCM20. vol. 5, Composite Construction Laboratory (CCLab), pp. 27-34, 20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022, Lausanne, Switzerland, 26/06/22. https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0

Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels. / Kontopoulou, Athina; Manno, Riccardo; Zhang, Bing et al.
Proceedings of the 20th European Conference on Composite Materials, ECCM20. ed. / Anastasios P. Vassilopoulos; Véronique Michaud. Vol. 5 Composite Construction Laboratory (CCLab), 2022. p. 27-34.

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

TY - GEN

T1 - Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels

AU - Kontopoulou, Athina

AU - Manno, Riccardo

AU - Zhang, Bing

AU - Scarpa, Fabrizio

AU - Allegri, Giuliano

PY - 2022/7/2

Y1 - 2022/7/2

N2 - The evolution of additive manufacturing techniques has vastly increased the design space of lattice structures, making it possible to create stiffer and lighter ones. This work deals with the evolutionary shape and size optimization of lattice structures, using a genetic algorithm (GA). A modelling framework involving finite element (FE) homogenization of representative volume elements (RVE) under strain-controlled Periodic Boundary Conditions (PBCs) is employed. Several designs of lattice structures were optimized with this approach. These designs were obtained superimposing basic lattice unit cells, such as body-centred cubic (BCC), face-centred cubic (FCC), simple cubic (SC) and octahedral, considering additive manufacturing constraints. The optimization objective was the maximisation of the specific compressive stiffness of the lattices, limiting the maximum relative density to 0.30. The optimized led to a five-fold increase of the specific compressive stiffness.

AB - The evolution of additive manufacturing techniques has vastly increased the design space of lattice structures, making it possible to create stiffer and lighter ones. This work deals with the evolutionary shape and size optimization of lattice structures, using a genetic algorithm (GA). A modelling framework involving finite element (FE) homogenization of representative volume elements (RVE) under strain-controlled Periodic Boundary Conditions (PBCs) is employed. Several designs of lattice structures were optimized with this approach. These designs were obtained superimposing basic lattice unit cells, such as body-centred cubic (BCC), face-centred cubic (FCC), simple cubic (SC) and octahedral, considering additive manufacturing constraints. The optimization objective was the maximisation of the specific compressive stiffness of the lattices, limiting the maximum relative density to 0.30. The optimized led to a five-fold increase of the specific compressive stiffness.

KW - Lattice structures

KW - Homogenization

KW - Finite Element method

KW - EVOLUTIONARY OPTIMIZATION

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EP - 34

BT - Proceedings of the 20th European Conference on Composite Materials, ECCM20

A2 - Vassilopoulos, Anastasios P.

A2 - Michaud, Véronique

PB - Composite Construction Laboratory (CCLab)

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Y2 - 26 June 2022 through 30 June 2022

ER -

Kontopoulou A, Manno R, Zhang B, Scarpa F , Allegri G. Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels. In Vassilopoulos AP, Michaud V, editors, Proceedings of the 20th European Conference on Composite Materials, ECCM20. Vol. 5. Composite Construction Laboratory (CCLab). 2022. p. 27-34 doi: 10.5075/epfl-298799_978-2-9701614-0-0

Shape and Size Optimization of Additive Manufactured Lattice Cores with an Evolutionary-Based Approach for High Performance Sandwich Panels

Abstract

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Keywords

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