A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials
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 per...
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doaj-814cad281b9a41369ddb4fd2ca4085f82020-11-25T03:14:04ZengMDPI AGMaterials1996-19442020-09-01134083408310.3390/ma13184083A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice MaterialsLijun Xiao0Xiao Xu1Weidong Song2Menglei Hu3State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaMulti-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.https://www.mdpi.com/1996-1944/13/18/4083micro-lattice structuremulti-cell hybridenergy absorptionfinite element modelingadditive manufacturing |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lijun Xiao Xiao Xu Weidong Song Menglei Hu |
spellingShingle |
Lijun Xiao Xiao Xu Weidong Song Menglei Hu A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials Materials micro-lattice structure multi-cell hybrid energy absorption finite element modeling additive manufacturing |
author_facet |
Lijun Xiao Xiao Xu Weidong Song Menglei Hu |
author_sort |
Lijun Xiao |
title |
A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials |
title_short |
A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials |
title_full |
A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials |
title_fullStr |
A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials |
title_full_unstemmed |
A Multi-Cell Hybrid Approach to Elevate the Energy Absorption of Micro-Lattice Materials |
title_sort |
multi-cell hybrid approach to elevate the energy absorption of micro-lattice materials |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-09-01 |
description |
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. |
topic |
micro-lattice structure multi-cell hybrid energy absorption finite element modeling additive manufacturing |
url |
https://www.mdpi.com/1996-1944/13/18/4083 |
work_keys_str_mv |
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