{"title":"A multi-scale mechanical model of multilevel helical structures with filament damage","authors":"","doi":"10.1016/j.ijmecsci.2024.109654","DOIUrl":null,"url":null,"abstract":"<div><p>Multilevel helical structures are widely used in biology and engineering fields. The multilevel helical structure exhibits interesting and complex mechanical behaviors due to the hierarchical feature and interactions between various structural scales. Herein, by extending the straight filament shear-lag model, a multi-scale damage mechanical model including the helical filament and sub-cable scales is established to investigate the mechanical behavior of the multilevel helical structure. The effect of filament breakage, contact interactions, and helical characteristics on the mechanical responses of the sub-cable is investigated. It is found that helical filaments have the higher deformation flexibility than straight filaments, thus weakening the stress transferring capacity and inhibiting filament breakage. The stress-strain curve of the helical filament exhibits a plateau region by adjusting laying angles. It is demonstrated for the helical structure level that the axial tension stiffness can be enhanced by increasing laying angles of the filament bundle and sub-cable. Axial coupling stiffness with filament damage exhibits the non-monotonic variation with sub-cable laying angles. The effectiveness of the present model is also verified by comparison with axial tensile experiments of composite wires. This research seeks to elucidate the intertwined impacts of filament damage and helical characteristics on the mechanical behaviors of multilevel helical structures.</p></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":null,"pages":null},"PeriodicalIF":7.1000,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mechanical Sciences","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0020740324006957","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Multilevel helical structures are widely used in biology and engineering fields. The multilevel helical structure exhibits interesting and complex mechanical behaviors due to the hierarchical feature and interactions between various structural scales. Herein, by extending the straight filament shear-lag model, a multi-scale damage mechanical model including the helical filament and sub-cable scales is established to investigate the mechanical behavior of the multilevel helical structure. The effect of filament breakage, contact interactions, and helical characteristics on the mechanical responses of the sub-cable is investigated. It is found that helical filaments have the higher deformation flexibility than straight filaments, thus weakening the stress transferring capacity and inhibiting filament breakage. The stress-strain curve of the helical filament exhibits a plateau region by adjusting laying angles. It is demonstrated for the helical structure level that the axial tension stiffness can be enhanced by increasing laying angles of the filament bundle and sub-cable. Axial coupling stiffness with filament damage exhibits the non-monotonic variation with sub-cable laying angles. The effectiveness of the present model is also verified by comparison with axial tensile experiments of composite wires. This research seeks to elucidate the intertwined impacts of filament damage and helical characteristics on the mechanical behaviors of multilevel helical structures.
期刊介绍:
The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering.
The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture).
Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content.
In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.