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Stiffness design of a multilayer arbitrary BCC lattice structure with face sheets

机译：带面板的多层任意BCC晶格结构的刚度设计

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摘要

In this paper, a theoretical stiffness design approach for a body-centered cubic (BCC) lattice structure is proposed. Although numerous studies have focused on lattice structures, particularly BCC lattice structure, there are still some issues that must be further investigated. Homogenization method is always followed that the mechanical properties of lattice structure can be achieved by directly solving the unit cell, since the structure is a periodically repeated sequence of a unit cell. However, the equivalent modulus varies a lot with different array configurations from our study, which indicates that the spatial array configuration also has an important influence on the equivalent mechanical properties. In this paper, "large unit cell" assumption is used to characterize the equivalent modulus of the lattice structure considering array configuration effect, and then validated using the finite element method (FEM) and experiment. The results demonstrate that the mechanical properties vary significantly for different array configurations, even those with the same unit cell topology. Furthermore, the proposed method is extended to an arbitrary BCC unit cell to broaden its application for stiffness design of engineering parts. This research provides a guidance for the stiffness design of lightweight lattice structures.
机译：本文提出了一种用于体心立方晶格结构的理论刚度设计方法。尽管许多研究集中于晶格结构，尤其是BCC晶格结构，但仍有一些问题需要进一步研究。始终遵循均质化方法，可以通过直接求解晶胞来获得晶格结构的机械性能，因为该结构是晶胞的周期性重复序列。然而，等效模量随我们研究中的不同阵列配置而变化很大，这表明空间阵列配置对等效机械性能也有重要影响。在本文中，“大晶胞”假设用于表征考虑阵列配置效应的晶格结构的等效模量，然后使用有限元方法（FEM）和实验进行验证。结果表明，即使具有相同的晶胞拓扑结构，不同阵列配置的机械性能也有很大差异。此外，该方法扩展到任意的BCC晶胞，以扩展其在工程零件刚度设计中的应用。该研究为轻质晶格结构的刚度设计提供了指导。

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  • 来源
    《Composite Structures》 |2019年第12期|111485.1-111485.12|共12页
  • 作者

  • 作者单位

    Beijing Inst Technol Inst Adv Struct Technol Beijing 100081 Peoples R China|Beijing Key Lab Lightweight Multifunct Composite Beijing 100081 Peoples R China;

    Army Aviat Inst Beijing 100123 Peoples R China;

    Beijing Inst Technol Inst Adv Struct Technol Beijing 100081 Peoples R China|Beijing Key Lab Lightweight Multifunct Composite Beijing 100081 Peoples R China|Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing 100081 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Stiffness design; Multilayer lattice structures; Array configuration; BCC lattice structure;

    机译：刚度设计;多层晶格结构;阵列配置;BCC晶格结构;

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