STUDY ON ELASTIC MECHANICAL PROPERTY OF NOVEL OBLIQUE CROSS-LIKE STRUCTURE WITH NEGATIVE POISSON’S RATIO (MT)

HAN Guang; QIE YanHui; BAN BaoWang

doi:10.16579/j.issn.1001.9669.2023.01.023

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STUDY ON ELASTIC MECHANICAL PROPERTY OF NOVEL OBLIQUE CROSS-LIKE STRUCTURE WITH NEGATIVE POISSON’S RATIO (MT)

更新时间：2023-07-28

- STUDY ON ELASTIC MECHANICAL PROPERTY OF NOVEL OBLIQUE CROSS-LIKE STRUCTURE WITH NEGATIVE POISSON’S RATIO (MT)
- Journal of Mechanical Strength Issue 1, Pages: 183-189(2023)
- 作者机构：
  
  1. 河北工业大学机械工程学院
  2. 唐钢国际工程技术股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2023.01.023
  CLC：
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HAN Guang, QIE YanHui, BAN BaoWang. STUDY ON ELASTIC MECHANICAL PROPERTY OF NOVEL OBLIQUE CROSS-LIKE STRUCTURE WITH NEGATIVE POISSON’S RATIO (MT). [J]. Journal of Mechanical Strength (1):183-189(2023)
DOI：

HAN Guang, QIE YanHui, BAN BaoWang. STUDY ON ELASTIC MECHANICAL PROPERTY OF NOVEL OBLIQUE CROSS-LIKE STRUCTURE WITH NEGATIVE POISSON’S RATIO (MT). [J]. Journal of Mechanical Strength (1):183-189(2023) DOI： 10.16579/j.issn.1001.9669.2023.01.023.

摘要

负泊松比(Negative Poisson’s Ratio, NPR)结构优异的能量吸收和体积变化可调能力，使其在航空航天、生物医学和军工设备等领域具有广泛的应用前景。提出了一种水平和铅垂方向具有负泊松比特性而45°方向具有正泊松比特性的新型斜十字结构，并利用能量法和卡氏第二定理，推导了该结构的等效弹性模量、等效泊松比及相对密度的解析表达式。利用有限元模拟和实验测试，验证了解析表达式的正确性。同时，给出了几何参数对结构等效弹性模量和泊松比的影响规律。研究结果完善了该类结构在力学性能方面的研究，为其在工程实际中的推广和应用提供了理论依据。

Abstract

Negative Poisson’s ratio（NPR） structure has been widely used in aerospace, biomedicine and military equipment and other fields owing to its outstanding energy absorption and adjustable volume. A novel type of inclined cross-like cellular re-entrant structure with negative Poisson’s ratio in horizontal and vertical directions and positive Poisson’s ratio in 45° oblique direction is proposed. The analytical expressions of the equivalent elastic modulus, equivalent Poisson’s ratio and relative density of the structure are derived by using the energy method and Castigliano’s second theorem. The correctness of the analytical expression is verified by finite element simulation and experimental test. Meanwhile, the effects of the geometric parameters on the equivalent elastic modulus and Poisson’s ratio are given. The research results improve the mechanical properties of this kind of structure, and provide a theoretical basis for its promotion and application in engineering practice.

关键词

负泊松比力学性能拉胀结构胞元结构能量法

Keywords

Negative Poisson’s ratioMechanical propertiesAuxetic structureCellular structureEnergy method

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