arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.10552physics.app-ph
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负泊松比超材料的两相拓扑优化

Two-Phase Topology Optimization for Metamaterials with Negative Poisson's Ratio

Daichi Akamatsu, Yuki Noguchi, Kei Matsushima, Yuji Sato, Jun Yanagimoto, Takayuki Yamada

摘要:

尽管3D打印技术的最新发展使得制造具有特征机械性能的超材料成为可能,但制造包含空腔的复杂形状并不容易。在这项研究中,包括两种类型的材料没有一个腔的复合结构进行了优化。此外,开发了可以使用增材制造方法制造的具有负泊松比的机械超材料。首先简要介绍了表征复合材料结构性能的均匀化方法。在此基础上,建立了实现负泊松比的优化问题,并提出了一种基于水平集的拓扑优化方法。最后,通过三维数值算例验证了该方法的有效性,并对优化设计的变形行为进行了数值分析。此外,使用3D打印机制造包含用于拉伸测试的具有负泊松比的优化设计的样品。我们进行了一些实验,以评估其机械性能。

英文摘要:

Although recent developments in 3D printing technology have made it possible to fabricate metamaterials with characteristic mechanical properties, it is not easy to fabricate complex shapes containing cavities. In this study, a composite structure comprising two types of materials without a cavity was optimized. Moreover, a mechanical metamaterial with a negative Poisson's ratio that can be fabricated using an additive manufacturing method was developed. First, a homogenization method that characterizes the properties of composite structures was briefly described. Then, an optimization problem to realize a negative Poisson's ratio was formulated, and a level set-based topology optimization method was proposed to solve the abovementioned problem. Next, three-dimensional numerical examples are presented to confirm the effectiveness of the proposed method, and the deformation behaviors of the optimized designs are numerically examined. Furthermore, a sample containing the optimized design with negative Poisson's ratio for the tensile test was fabricated using a 3D printer. We conducted some experiments to evaluate its mechanical performance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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