Numerical and experimental investigation of 3D printed tunable stiffness metamaterial with real-time response using digital light processing technology

IF 6.2 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Mahdi Khajepour, Abbas Bayati, Behrad Rezaee, Alireza Khatami, Mohammad Amin Soltani, Ghader Faraji, Karen Abrinia, Mostafa Baghani, Majid Baniassadi
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Abstract

A tunable mechanical metamaterial is a type that can be altered or manipulated to change its physical properties in various situations. This study introduces a novel type of metamaterial, hydro-tunable metamaterials (HTMs), which can be dynamically adjusted in real-time by filling or draining it with water. The development of HTMs has significant implications for various fields, including mechanical engineering, biomedical applications, and energy absorption. The study involves designing and manufacturing HTMs using a Digital Light Processing (DLP) 3D printing process. The design process involves modifying an initial basic auxetic structure to create a closed and sealed structure accommodating fluid. The printed samples are then characterized using mechanical testing and finite element analysis (FEA). Experiments and simulations have found that a sample containing water behaves differently from a sample without water, resulting in an increase in stiffness. This difference can be leveraged to modify the stiffness and strength of the structure. This phenomenon is attributed to the incompressibility of water within the structure. Water exerts a hydrostatic pressure on the auxetic material, resulting in increased stiffness and resistance to compression. This technique highlights the potential of HTMs to be dynamically adjusted in real-time, leading to enhanced energy absorption and improved performance. An additional FEA was conducted to examine the impact of water pressure on the mechanical behavior of the structure. The results indicate that applying pressure or temperature to the water can significantly enhance the mechanical properties of the water-filled sample.

Abstract Image

利用数字光处理技术对具有实时响应的 3D 打印可调刚度超材料进行数值和实验研究
可调谐机械超材料是一种可在各种情况下改变或操纵其物理特性的类型。本研究介绍了一种新型超材料--水调谐超材料(HTMs),它可以通过注水或排水进行实时动态调节。HTMs 的开发对机械工程、生物医学应用和能量吸收等多个领域具有重要意义。这项研究涉及使用数字光处理(DLP)3D 打印工艺设计和制造 HTM。设计过程包括修改最初的基本辅助结构,以创建可容纳流体的封闭式密封结构。然后利用机械测试和有限元分析(FEA)对打印出的样品进行表征。实验和模拟发现,含水样品与不含水样品的行为不同,导致刚度增加。可以利用这种差异来改变结构的刚度和强度。这种现象归因于结构中水的不可压缩性。水对辅助材料施加了静水压力,从而增加了刚度和抗压性。这项技术凸显了 HTM 实时动态调整的潜力,从而增强了能量吸收并提高了性能。另外还进行了一次有限元分析,以研究水压对结构机械行为的影响。结果表明,对水施加压力或温度可显著提高充水样品的机械性能。
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来源期刊
Journal of Materials Research and Technology-Jmr&t
Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys
CiteScore
8.80
自引率
9.40%
发文量
1877
审稿时长
35 days
期刊介绍: The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.
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