Advanced lattice material with high energy absorption based on topology optimisation

Yang, Chengxing; Li, Qingming

doi:10.1016/j.mechmat.2020.103536

Cited by 54 publications

(31 citation statements)

References 26 publications

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“…Nevertheless, it should be noted that the beam element could not reflect the failure evolution properly. Considering that the structural design is the main concerned of our manuscript and in order to reduce the computational cost, the failure was not incorporated in the simulations for simplicity similar to [ 38 ].…”

Section: Methodsmentioning

confidence: 99%

A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials

Xiao

Song

et al. 2020

Materials

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Multi-cell hybrid micro-lattice materials, in which the stretching dominated octet cells were adopted as the strengthen phase while the bending dominated body centered cubic (BCC) lattice was chosen as the soft matrix, were proposed to achieve superior mechanical properties and energy absorption performance. Both stochastic and symmetric distribution of octet cells in the BCC lattice were considered. The cell assembly micromechanics finite element model (FEM) was built and validated by the experimental results. Accordingly, virtual tests were conducted to reveal the stress–strain relationship and deformation patterns of the hybrid lattice specimens. Meanwhile, the influence of reinforcement volume fraction and strut material on the energy absorption ability of the specimens was analyzed. It was concluded that the reinforced octet cells could be adopted to elevate the elastic modulus and collapse strength of the pure BCC micro-lattice material. The multi-cell design could lead to strain hardening in the plateau stress region which resulted in higher plateau stresses and energy absorption capacities. Besides, the symmetric distribution of reinforcements would cause significant stress fluctuations in the plateau region. The obtained results demonstrated that the multi-cell hybrid lattice architectures could be applied to tailor the mechanical behavior and plastic energy absorption performance of micro-lattice materials.

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Section: Methodsmentioning

confidence: 99%

A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials

Xiao

Song

et al. 2020

Materials

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“…In addition, some excellent properties of biomimetic structures are also used in the optimal design of lattice structures. Yang and Li 18 fabricates a cuttlebone-like lattice (CLL) material is obtained and its deformation behavior and compressive properties under impact loads are investigated. The results show that the CLL material undergoes a buckling-dominated and layer-by-layer deforming process, the CLL material outperforms a broad range of existing cellular materials in terms of relative collapse strength, relative elastic modulus and SEA.…”

Section: Introductionmentioning

confidence: 99%

Compression Behavior of 3D Printed Polymer TPU Cubic Lattice Structure

Zhang

Deng

et al. 2022

Mat. Res.

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Based on the face-centered cubic structure, several different types of cubic lattice structures are designed in this paper, the quasi-static compression behavior of the lattice structure is thoroughly investigated by finite element simulation and experimental testing, in which mechanical properties and energy absorption capacities are summarized. The experimental specimens made from thermoplastic polyurethane TPU are additively manufactured using the fused deposition technology. Effects of strut style, strut distance, arrangement form, curvature, and several honeycomb lattice structures are considered. The results show that: under the condition of the same relative density, the selection of sinusoidal struts with larger curvature, the arrangement of 45°/135°, and the inward gradient of the strut distance can all improve the energy absorption characteristics of the structure. Compared with the traditional face-centered cubic structure (specimen L-1), the SEA of the structure with the strut curvature of 0.25, the 45°/135° arrangement of the sinusoidal struts, and the inward gradient of the strut distance is improved by 64% , 190%, and 107%; the introduction of a honeycomb structure with a high relative density can effectively resist the buckling deformation of the structure, and the SEA of the triangular, re-entrant and hexagonal honeycomb structures are 354%, 603% and 548% higher than that of the basic structure, respectively. In addition, reducing the lattice height also resists destabilization.

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“…Benefiting from structural advantages such as lightweight, high strength [1], superior energy absorption [2][3][4] and shock impact [5], the periodic lattice structure with parametric design has been widely used in impact protection devices [6], aerospace [7], and body implants [8,9]. Advanced manufacturing features of 3D printing [10][11][12], such as freedom design, layer-by-layer sintering and conformal manufacturing, provide a powerful tool for the fabrication of lattice structures with complex geometric topologies [12][13][14] and eliminate the restrictions for designers.…”

Section: Introductionmentioning

confidence: 99%

A novel design method for TPMS lattice structures with complex contour based on moving elements method

Zhang

Yu³

et al. 2022

Int J Adv Manuf Technol

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Over the past few decades, there have been many important achievements on the design, research and development of minimal surface lattice structures. In this work, we propose a modeling method for triply periodic minimal surfaces (TPMS) lattice structures with complex contours. This method is based on moving elements method (MEM) and mainly includes the following parts, such as dividing the model mesh, solving the iso-surface of the TPMS in the model, obtaining the TPMS lattice structure triangular surface of the model outline, integrating the interior of the model and the outline, and finally generating an STL file that can be used for additive manufacturing. Furthermore, the representative femur model, rabbit model and gear model are provided as case studies to verify the validity and correctness of the proposed modeling method. Then, this approach is compared with the distance field method in terms of modeling speed and modeling accuracy. The research results show that the modeling method proposed in this paper has certain advantages in the generation of complex model lattice structures. Moreover, this method provides technical means and simulation data for designing TPMS lattice structures with complex contour, and offers the underlying design ideas for the development and application of the excellent physical properties of TPMS lattice structures in medicine and engineering.

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Advanced lattice material with high energy absorption based on topology optimisation

Cited by 54 publications

References 26 publications

A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials

A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials

Compression Behavior of 3D Printed Polymer TPU Cubic Lattice Structure

A novel design method for TPMS lattice structures with complex contour based on moving elements method

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