{"title":"A temperature-regulated multi-material compression-torsion metamaterial with local bistability","authors":"Hao Chen , Yongtao Yao , Yanju Liu , Wenfeng Bian","doi":"10.1016/j.tws.2024.112629","DOIUrl":null,"url":null,"abstract":"<div><div>In this paper, based on the compression-torsion coupling structure, we designed and fabricated a structure that exhibits a temperature-controlled local bistability phenomenon during uniaxial compression at different temperatures. In the structure, based on the quadrilateral rigid frames, the flexible connecting bands are hinged to the frames by pins, and the shape memory polymer inclined struts are bonded to the frames. The compression-torsion coupling causes the bend of the inclined struts and the rotation of the rigid frames, then causing the connecting bands to post-buckling. The inclined struts can adjust and control the deformation process under thermal loads, because the modulus of the shape memory polymer is controlled by temperature, so that the deformation of the structure is reversible/irreversible under programmable temperature/displacement loads. The analytical model and numerical simulation show that the local bistability can be achieved under temperature control and different boundary conditions. An assembled metamaterial structure is fabricated by combining 3D printed parts. The relationships between the reversibility/irreversibility of the structural deformation and temperature/displacement loads are verified by experiments. The local bistable phenomenon enables the structure to remember the history of the load, providing inspiration for new functional designs in the fields of intelligent memory, encoding display, and vibration energy absorption.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112629"},"PeriodicalIF":5.7000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin-Walled Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263823124010693","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, based on the compression-torsion coupling structure, we designed and fabricated a structure that exhibits a temperature-controlled local bistability phenomenon during uniaxial compression at different temperatures. In the structure, based on the quadrilateral rigid frames, the flexible connecting bands are hinged to the frames by pins, and the shape memory polymer inclined struts are bonded to the frames. The compression-torsion coupling causes the bend of the inclined struts and the rotation of the rigid frames, then causing the connecting bands to post-buckling. The inclined struts can adjust and control the deformation process under thermal loads, because the modulus of the shape memory polymer is controlled by temperature, so that the deformation of the structure is reversible/irreversible under programmable temperature/displacement loads. The analytical model and numerical simulation show that the local bistability can be achieved under temperature control and different boundary conditions. An assembled metamaterial structure is fabricated by combining 3D printed parts. The relationships between the reversibility/irreversibility of the structural deformation and temperature/displacement loads are verified by experiments. The local bistable phenomenon enables the structure to remember the history of the load, providing inspiration for new functional designs in the fields of intelligent memory, encoding display, and vibration energy absorption.
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.
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