Electrical/thermal triggering on shape memory composite tubes with different braiding angles

IF 3.7 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION Smart Materials and Structures Pub Date : 2024-06-11 DOI:10.1088/1361-665x/ad525a

Qin Yang, Renyi Liu, Bohong Gu, Baozhong Sun, Chaofeng Han and Wei Zhang

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Abstract

2D braided shape memory composite (SMPC) tubes, with near-net shape manufacturing and programmable, are widely utilized in smart structures. Here we have developed braided tubes of continuous carbon fiber reinforced shape memory polyurethane (SMPU) composites. This innovative design yields a synergistic boost in both mechanical strength, shape memory functionality, and dual-trigger responsiveness. The mechanical properties, electrical/thermal shape memory performance, and recovery force of the SMPC tubes with various braiding angles have been investigated. The effects of braiding angle, temperature dependence, and applied current on the mechanical properties and shape memory properties were revealed. We found a substantial increase in compression load and ring stiffness as the braiding angle increased and the temperature decreased. The SMPC tubes exhibited a recovery ratio of 99% under electrical and thermal triggering, demonstrating a more rapid shape recovery compared to the SMPU tubes solely under thermal triggering. The large-angle specimens exhibited shorter recovery times, higher recovery forces (up to 11.40 N), and faster responses upon electrical stimulation. The ability of SMPC tubes to generate a recovery force several times greater than their weight holds great potential for expanding the applications of smart actuators.

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不同编织角形状记忆复合管上的电/热触发器

二维编织形状记忆复合材料（SMPC）管具有近净形状制造和可编程的特点，被广泛应用于智能结构中。在这里，我们开发了连续碳纤维增强形状记忆聚氨酯（SMPU）复合材料编织管。这种创新设计在机械强度、形状记忆功能和双触发响应性方面产生了协同增效作用。我们研究了具有不同编织角的 SMPC 管的机械性能、电/热形状记忆性能和恢复力。研究揭示了编织角度、温度依赖性和外加电流对机械性能和形状记忆性能的影响。我们发现，随着编织角的增加和温度的降低，压缩载荷和环刚度大幅增加。在电气和热触发条件下，SMPC 管的恢复率达到 99%，与仅在热触发条件下的 SMPU 管相比，其形状恢复更快。大角度试样的恢复时间更短，恢复力更大（达 11.40 牛），在电刺激下反应更快。SMPC 管能够产生数倍于其重量的恢复力，这为扩大智能致动器的应用领域提供了巨大潜力。

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来源期刊

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

期刊介绍： Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.