操纵多稳吸能结构材料的局部几何特性

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-05 DOI:10.1016/j.tws.2024.112535

Xianhua Yao , Haiyang Zhao , Ruiqi Ma , Nan Hu

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引用次数: 0

摘要

在多稳态吸能结构材料（MEAMs）中，优化单元格的全局几何特征及其空间排列已经得到了很好的研究，但其优化的几何特征可能导致高度复杂的特征，需要昂贵的增材制造技术。在本研究中，我们介绍了一种通用设计策略，用于调整 MEAM 中薄曲线梁的局部厚度变化。我们从数值上确定了最佳非均匀调制参数，以最大化 MEAM 单元、阵列和圆柱体的能量捕获能力。然后，我们对采用非均匀设计的 MEAM 柱体进行了准静态压缩和跌落冲击试验，以证明所提出的方法在相同材料消耗的情况下实现同等能量吸收能力的有效性。总之，我们相信我们易于实施的策略可以应用于任何类型的具有细长梁元素的 MEAM，并嵌入到吸能设备和结构中。

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Manipulating localized geometric characteristics in multistable energy-absorbing architected materials

Optimizing global geometric features of unit cells and their spatial arrangements have been well studied in multistable energy-absorbing architected materials (MEAMs), yet their optimized geometries could lead to highly complex features that require expensive additive manufacturing techniques. In this study, we introduce a generalized design strategy to adjust localized thickness variation of thin curved beams in MEAMs. We numerically identify the optimal non-uniform modulation parameter for maximizing energy trapping capacity across MEAM cells, arrays, and cylinders. Then, quasi-static compression and drop impact tests on MEAM cylinders with non-uniform designs are conducted to prove the proposed method's effectiveness in achieving equivalent energy-absorbing abilities with the same material consumption. Overall, we believe that our easy-to-implement strategy can be applied to any type of MEAM with slender beam elements and embedded into energy-absorbing devices and structures.

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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.