A 3D kirigami meta-structure with programmable and directionally tailored thermal expansion

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-09-16 DOI:10.1016/j.tws.2025.114002

Tinghui Wei , Fucong Lu , Chuanbiao Zhang , Kelan Mo , Yang Liu , Yilin Zhu

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引用次数: 0

Abstract

Thermally responsive mechanical metamaterials enable unconventional thermal expansion behaviors for advanced engineering applications. However, existing designs often face challenges in achieving scalable and programmable tailored responses. In this work, we proposed a 3D kirigami meta-structure capable of realizing positive, zero, and negative thermal expansion (PTE, ZTE, and NTE) through a kinematics-driven design strategy. To achieve thermal actuation, curved thermostatic metal strips were integrated in place of traditional creases. The design was validated through theoretical modeling, finite element (FE) simulations, and experimental tests. Furthermore, by assembling unit cells with varied geometries and material configurations, complex yet deformation-compatible arrays are constructed, significantly enhancing both flexibility and scalability. Overall, this work presents a programmable, scalable, and directionally tailored thermal response strategy, with promising applications in thermal stress management for precision engineering systems such as space telescopes, satellite components, and advanced optical instruments.

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三维基里伽米元结构，具有可编程和定向定制的热膨胀

热响应机械超材料为先进的工程应用提供了非常规的热膨胀行为。然而，现有的设计在实现可扩展和可编程的定制响应方面经常面临挑战。在这项工作中，我们提出了一个3D基里伽米元结构，能够通过运动学驱动的设计策略实现正、零和负热膨胀（PTE、ZTE和NTE）。为了实现热驱动，将弯曲的恒温金属条集成在传统的折痕中。通过理论建模、有限元仿真和实验测试验证了该设计。此外，通过组装具有不同几何形状和材料配置的单元格，构建了复杂但变形兼容的阵列，显著提高了灵活性和可扩展性。总的来说，这项工作提出了一种可编程的、可扩展的、定向定制的热响应策略，在精密工程系统（如太空望远镜、卫星组件和先进光学仪器）的热应力管理中具有前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.