Complex mechanical properties of 3D micro-metric pantographic metamaterials fabricated by two-photon polymerization

Complex mechanical properties of 3D micro-metric pantographic metamaterials fabricated by two-photon polymerization | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Complex mechanical properties of 3D micro-metric pantographic metamaterials fabricated by two-photon polymerization Emilio Barchiesi, Stefanos Mavrikos, Ivan Giorgio, Costas Grigoropoulos, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4777260/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 16 Sep, 2024 Read the published version in Continuum Mechanics and Thermodynamics → Version 1 posted 10 You are reading this latest preprint version Abstract Mechanical metamaterials consist of specially engineered features designed to tailor and enhance the mechanical properties of their constituent materials. In this context, 2D pantographic fabrics have gained attention for their unique deformation behavior, providing remarkable resilience and damage tolerance. This study explores micro-metric metamaterials with 3D pantographic motifs, aiming to transfer these properties to small scales. 3D micro-metric structures were designed using 2D pantographic fabrics arranged in multiple layers, each featuring unit cells with quasi-perfect pivots. Relatively large specimens of 3D micro-metric pantographs, measuring 158μm x 250 μm x 450 μm, were fabricated using two-photon polymerization in various configurations. These specimens were mechanically characterized through in-situ scanning electron microscopy microindentation under conditions of cyclic deformation. Structural failures were subsequently assessed via helium-ion microscopy. The 3D micro-metric pantographs exhibited complex mechanical properties, some aligning with those of 2D pantographic fabrics, while new properties, such as a dissipative response and softening, were identified. Nonetheless, the 3D micro-metric pantographs demonstrated great resilience against deformation and enhanced resistance to undesired out-of-plane motions, indicating their potential for novel applications in advanced engineering fields. Additionally, the findings can potentially lead to optimizing and enriching theoretical models describing the mechanical behavior of pantographic metamaterials. Mechanical metamaterials two-photon polymerization pantographic structures in-situ SEM microindentation Full Text Additional Declarations No competing interests reported. Supplementary Files SupplementaryFile1.mp4 SupplementaryFile2.mp4 SupplementaryFile3.mp4 Cite Share Download PDF Status: Published Journal Publication published 16 Sep, 2024 Read the published version in Continuum Mechanics and Thermodynamics → Version 1 posted Editorial decision: Revision requested 08 Aug, 2024 Reviews received at journal 08 Aug, 2024 Reviewers agreed at journal 31 Jul, 2024 Reviewers agreed at journal 31 Jul, 2024 Reviews received at journal 31 Jul, 2024 Reviewers agreed at journal 23 Jul, 2024 Reviewers invited by journal 23 Jul, 2024 Editor assigned by journal 23 Jul, 2024 Submission checks completed at journal 22 Jul, 2024 First submitted to journal 21 Jul, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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