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1.河北工业大学 机械工程学院,天津 300401
2.天津河工大先进装备研究院有限公司,天津 300401
3.唐钢国际工程技术股份有限公司,唐山 063000
刘宇乐,男,1998年生,河南信阳人,硕士研究生;主要研究方向为力学超材料结构的设计和数值模拟;E-mail:839473779@qq.com。
郄彦辉(通信作者),男,1976年生,河北保定人,博士,副教授,硕士研究生导师;主要研究方向为承压设备的安全评估、力学超材料结构的设计与性能表征、结构的数值模拟和优化设计;E-mail:qieyanhui@126.com。
收稿日期:2023-09-26,
修回日期:2023-12-20,
纸质出版日期:2025-06-15
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刘宇乐,邓先溥,郄彦辉,等. 新型负泊松比材料内凹正四面体胞元弹性性能研究[J]. 机械强度,2025,47(6):152-158.
LIU Yule,DENG Xianpu,QIE Yanhui,et al. Study on elastic properties of re-entrant regular tetrahedral cell of novel negative poisson ratio materials[J]. Journal of Mechanical Strength,2025,47(6):152-158.
刘宇乐,邓先溥,郄彦辉,等. 新型负泊松比材料内凹正四面体胞元弹性性能研究[J]. 机械强度,2025,47(6):152-158. DOI: 10.16579/j.issn.1001.9669.2025.06.018.
LIU Yule,DENG Xianpu,QIE Yanhui,et al. Study on elastic properties of re-entrant regular tetrahedral cell of novel negative poisson ratio materials[J]. Journal of Mechanical Strength,2025,47(6):152-158. DOI: 10.16579/j.issn.1001.9669.2025.06.018.
为了提高三维负泊松比材料的力学性能,拓展负泊松比材料的应用范围。首先,通过在正四面体多孔结构的边线引入内凹角,提出了一种全新的空间负泊松比材料的单位胞元,并对其进行了7种正交各向同性和正交各向异性的增强设计。利用均匀化有限元方法和周期性边界条件研究了胞元几何参数对新型胞元和增强胞元的量纲一等效弹性模量和泊松比的影响规律,并利用3D打印的树脂试样进行了试验验证。相比已有的负泊松比材料的正方体胞元,新型胞元可在保持负泊松比特性的同时节省材料50%;
x
向、
y
向和
xy
两向3种增强方案可在提高负泊松比特性的同时明显提高承载能力。
In order to improve the mechanical properties of three-dimensional negative Poisson ratio materials
and expand the application of negative Poisson ratio materials. A new unit cell of negative Poisson ratio structural material was proposed by introducing internal concave angles into the edges of tetrahedral porous structures
and 7 kinds of orthogonal isotropic and orthogonal anisotropic enhancement designs were carried out on it. The influence of cell geometry parameters on the dimension one equivalent elastic modulus and Poisson ratio of new and enhanced cells was studied by using the homogenized finite element method and periodic boundary conditions, and the 3D printed resin sample was used for experimental verification. Compared with the existing negative Poisson ratio unit cells
the novel unit cell can save 50% of materials while maintaining the negative Poisson ratio characteristics. The three reinforcement schemes in
x
-direction
y
-direction and
xy
-direction can significantly improve the bearing-load capacity while improving the negative Poisson ratio characteristics.
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邓先溥 , 班宝旺 , 郄彦辉 . 新型3D负泊松比多孔材料胞元的弹性性能研究 [J]. 机械科学与技术 , 2024 , 43 ( 1 ): 173 - 179 .
DENG Xianpu , BAN Baowang , QIE Yanhui . Study on the elastic properties of a novel 3D cellular materials with negative Poisson’s ratio [J]. Mechanical Science and Technology for Aerospace Engineering , 2024 , 43 ( 1 ): 173 - 179 . (In Chinese)
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