In order to study the deformation behavior of double arrowhead (DAH) auxetic metamaterials under different forces with different directions as well as the effects of the geometry parameters on the Poisson's ratio, this paper assembled an advanced researching method by combining the industrial design of SolidWorks software, the finite element analysis of Abaqus software and three-dimensional printed technology. Results show that the DAH structure expanded in the direction perpendicular to the force first and contracted with the strain increasing when it was pulled by the uniaxial force, no matter which direction the force is applied. Besides, the auxetic effect of the DAH structure under the tensile force in the X direction is longer than that under the tensile force in the Y direction. It is more resistant to compression when the DAH structure is subjected to transverse tensile forces than when it is subjected to longitudinal tensile forces. The angle of the V-shaped short truss has a significant impact on the negative Poisson's ratio of the DAH structure, while the angle of the V-shaped long truss angle has little influence on its auxetic performance. Specifically, the smaller the angles, the better the auxetic effect.

中文翻译：

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双箭头拉胀超材料受拉力学性能分析

为了研究不同方向不同力作用下双箭头（DAH）拉胀超材料的变形行为以及几何参数对泊松比的影响，本文结合SolidWorks软件的工业设计组装了一种先进的研究方法。 ，Abaqus 软件的有限元分析和三维打印技术。结果表明，DAH结构在被单轴力拉动时，无论向哪个方向施加力，都首先在垂直于力的方向上膨胀，并随着应变的增加而收缩。此外，DAH结构在X方向拉力作用下的拉胀作用大于Y方向拉力作用下的拉胀作用。当 DAH 结构承受横向拉力时，它比承受纵向拉力时更能抵抗压缩。V形短桁架角度对DAH结构的负泊松比影响显着，而V形长桁架角度对其拉胀性能影响不大。具体而言，角度越小，拉胀效果越好。