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| 星形内凹超材料的力学性能研究 |
| A Study on the Mechanical Properties of Star-Shaped Re-entrant Metamaterials |
| 投稿时间：2025-05-12 修订日期：2025-06-04 |
| DOI： |
| 中文关键词: 星型内凹结构 变截面 等效泊松比 等效弹性模量 能量法 |
| 英文关键词:Star-Shaped Concave Structures Variable Cross-Section Equivalent Poisson's Ratio Equivalent Elastic Modulus Energy Method |
| 基金项目:国家自然科学基金（12472012）；江西省自然科学基金（20232ACB204028） |
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| 中文摘要: |
| 本文采用能量法研究星型内凹负泊松比超材料的力学性能，设计了四种新型负泊松比星型结构，并计算了这四种变截面结构的等效泊松比与等效弹性模量。通过多参数调谐，二维周期性材料可展现出丰富的力学性能，包括等效负泊松比效应增强或减弱，以及等效弹性模量增长速率突变等现象。变截面设计为星型内凹负泊松比结构的性能优化提供了新思路，在结构性能调节方面具有重要作用。 |
| 英文摘要: |
| This study investigates the mechanical properties of star-shaped concave auxetic metamaterials using the energy method. Four novel configurations of negative Poisson's ratio star structures were designed, with their equivalent Poisson's ratios and elastic moduli systematically calculated. Two-dimensional periodic materials exhibit tunable mechanical characteristics through multi-parameter optimization, demonstrating phenomena such as enhancement or attenuation of equivalent negative Poisson's ratio effects, and abrupt changes in elastic modulus growth rates. The variable cross-section design establishes a novel conceptual framework for performance optimization of star-shaped auxetic structures, playing a pivotal role in mechanical property modulation. |
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