{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T18:24:50Z","timestamp":1791829490788,"version":"4.3.4"},"reference-count":32,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2021,10,26]],"date-time":"2021-10-26T00:00:00Z","timestamp":1635206400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51875440"],"award-info":[{"award-number":["51875440"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Materials with high strength and toughness have always been pursued by academic and industrial communities. This work presented a novel hybrid brick-and-mortar-like structure by introducing the wavy structure of the woodpecker beak for enhanced mechanical performance. The effects of tablet waviness and tablet wave number on the mechanical performance of the bio-inspired composites were analyzed. Compared with nacre-like composites with a flat tablet, the strength, stiffness and toughness of the novel hybrid nacre-like composite with tablet wave surface increased by up to 191.3%, 46.6% and 811.0%, respectively. The novel failure mode combining soft phase failure and tablet fracture revealed the key to the high toughness of composites. Finite element simulations were conducted to further explore the deformation and stress distribution of the hybrid brick-and-mortar-like structure. It showed that the hybrid brick-and-mortar-like structure can achieve a much better load transfer, which leads to greater tensile deformation in tablet before fracture, thus improving strength and energy absorption. These investigations have implications in the design of composites with high mechanical performance for aerospace, automobile and other manufacturing industries.<\/jats:p>","DOI":"10.3390\/polym13213681","type":"journal-article","created":{"date-parts":[[2021,10,26]],"date-time":"2021-10-26T23:54:33Z","timestamp":1635292473000},"page":"3681","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Hybrid Bio-Inspired Structure Based on Nacre and Woodpecker Beak for Enhanced Mechanical Performance"],"prefix":"10.3390","volume":"13","author":[{"given":"Zhongqiu","family":"Ding","sequence":"first","affiliation":[{"name":"State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ben","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong","family":"Xiao","sequence":"additional","affiliation":[{"name":"State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yugang","family":"Duan","sequence":"additional","affiliation":[{"name":"State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,10,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1146\/annurev-matsci-070909-104421","article-title":"Biological composites","volume":"40","author":"Dunlop","year":"2010","journal-title":"Annu. Rev. Mater. Res."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"4423","DOI":"10.1002\/adfm.201300340","article-title":"Biological and bioinspired composites with spatially tunable heterogeneous architectures","volume":"23","author":"Studart","year":"2013","journal-title":"Adv. Funct. Mater."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.pmatsci.2007.05.002","article-title":"Biological materials: Structure and mechanical properties","volume":"53","author":"Meyers","year":"2008","journal-title":"Prog. Mater. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"773","DOI":"10.1126\/science.1220854","article-title":"Structural biological materials: Critical mechanics-materials connections","volume":"339","author":"Connections","year":"2013","journal-title":"Science"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1380","DOI":"10.1016\/j.msec.2005.08.016","article-title":"Mechanical properties and structure of Strombus gigas, Tridacna gigas, and Haliotis rufescens sea shells: A comparative study","volume":"26","author":"Lin","year":"2006","journal-title":"Mater. Sci. Eng. C"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2001","DOI":"10.1023\/A:1017526830874","article-title":"Micromechanical model of nacre tested in tension","volume":"36","author":"Kotha","year":"2001","journal-title":"J. Mater. Sci."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"306","DOI":"10.1016\/j.jmps.2006.07.007","article-title":"On the mechanics of mother-of-pearl: A key feature in the material hierarchical structure","volume":"55","author":"Barthelat","year":"2007","journal-title":"J. Mech. Phys. Solids"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2485","DOI":"10.1557\/JMR.2001.0340","article-title":"Deformation mechanisms in nacre","volume":"16","author":"Wang","year":"2001","journal-title":"J. Mater. Res."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1007\/s11340-007-9040-1","article-title":"An experimental investigation of deformation and fracture of nacre\u2013mother of pearl","volume":"47","author":"Barthelat","year":"2007","journal-title":"Exp. Mech."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2167","DOI":"10.1080\/14786430410001680935","article-title":"The mechanical efficiency of natural materials","volume":"84","author":"Wegst","year":"2004","journal-title":"Philos. Mag."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1038\/nmat4089","article-title":"Bioinspired structural materials","volume":"14","author":"Wegst","year":"2014","journal-title":"Nat. Mater."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1111","DOI":"10.1039\/C1CS15106A","article-title":"Layered nanocomposites inspired by the structure and mechanical properties of nacre","volume":"41","author":"Wang","year":"2011","journal-title":"Chem. Soc. Rev."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1567","DOI":"10.1557\/JMR.2002.0233","article-title":"Microstructure and characteristics in the organic matrix layers of nacre","volume":"17","author":"Song","year":"2002","journal-title":"J. Mater. Res."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1097","DOI":"10.1557\/JMR.2005.0171","article-title":"Platelet interlocks are the key to toughness and strength in nacre","volume":"20","author":"Katti","year":"2005","journal-title":"J. Mater. Res."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"108754","DOI":"10.1016\/j.compositesb.2021.108754","article-title":"Tunable interface hardening: Designing tough bio-inspired composites through 3D printing, testing, and computational validation","volume":"215","author":"Ghimire","year":"2021","journal-title":"Compos. Part B Eng."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1016\/j.compstruct.2018.04.047","article-title":"Effects of tablet waviness on the mechanical response of architected multilayered materials: Modeling and experiment","volume":"195","author":"Askarinejad","year":"2018","journal-title":"Compos. Struct."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"100621","DOI":"10.1016\/j.eml.2019.100621","article-title":"Combination of stiffness, strength, and toughness in 3D printed interlocking nacre-like composites","volume":"35","author":"Liu","year":"2019","journal-title":"Extreme Mech. Lett."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1038\/ncomms1172","article-title":"Tablet-level origin of toughening in abalone shells and translation to synthetic composite materials","volume":"2","author":"Espinosa","year":"2011","journal-title":"Nat. Commun."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"295","DOI":"10.1021\/ab500120f","article-title":"Defect-tolerant bioinspired hierarchical composites: Simulation and Experiment","volume":"1","author":"Mirzaeifar","year":"2015","journal-title":"ACS Biomater. Sci. Eng."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"108374","DOI":"10.1016\/j.compscitech.2020.108374","article-title":"Bio-inspired non-self-similar hierarchical microstructures for damage tolerance","volume":"201","author":"Henry","year":"2020","journal-title":"Compos. Sci. Technol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1016\/j.jmbbm.2017.05.007","article-title":"Printing nature: Unraveling the role of nacre\u2019s mineral bridges","volume":"76","author":"Gu","year":"2017","journal-title":"J. Mech. Behav. Biomed. Mater."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"33256","DOI":"10.1021\/acsami.0c08181","article-title":"Bioinspired compliance grading motif of mortar in nacreous materials","volume":"12","author":"Ubaid","year":"2020","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"449","DOI":"10.1007\/s11837-012-0302-8","article-title":"The structure, functions, and mechanical properties of keratin","volume":"64","author":"McKittrick","year":"2012","journal-title":"JOM"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Liu, Y., Qiu, X., Zhang, X., and Yu, T.X. (2015). Response of woodpecker\u2019s head during pecking process simulated by material point method. PLoS ONE, 10.","DOI":"10.1371\/journal.pone.0122677"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Wang, L., Cheung, J.T.-M., Pu, F., Li, D., Zhang, M., and Fan, Y. (2011). Why do woodpeckers resist head impact injury: A biomechanical investigation. PLoS ONE, 6.","DOI":"10.1371\/journal.pone.0026490"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"20140274","DOI":"10.1098\/rsif.2014.0274","article-title":"Hierarchical multiscale structure\u2013property relationships of the red-bellied woodpecker (Melanerpes carolinus) beak","volume":"11","author":"Lee","year":"2014","journal-title":"J. R. Soc. Interface"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1412","DOI":"10.1016\/j.msec.2005.08.025","article-title":"The toucan beak: Structure and mechanical response","volume":"26","author":"Seki","year":"2006","journal-title":"Mater. Sci. Eng. C"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"6286","DOI":"10.1007\/s10853-018-3163-x","article-title":"Energy absorption of a bio-inspired honeycomb sandwich panel","volume":"54","author":"Ha","year":"2019","journal-title":"J. Mater. Sci."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1016\/j.apmt.2017.02.004","article-title":"Fundamentals and applications of 3D printing for novel materials","volume":"7","author":"Lee","year":"2017","journal-title":"Appl. Mater. Today"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.ijplas.2015.12.012","article-title":"Transversely isotropic hyperelastic-viscoplastic model for glassy polymers with application to additive manufactured photopolymers","volume":"80","author":"Zhang","year":"2016","journal-title":"Int. J. Plast."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1354","DOI":"10.1002\/adem.201600143","article-title":"Bone-inspired materials by design: Toughness amplification observed using 3D printing and testing","volume":"18","author":"Libonati","year":"2016","journal-title":"Adv. Eng. Mater."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"14944","DOI":"10.1016\/j.jmrt.2020.10.052","article-title":"Scale and size effects on the mechanical properties of bioinspired 3D printed two-phase composites","volume":"9","author":"Su","year":"2020","journal-title":"J. Mater. Res. Technol."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/21\/3681\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:23:45Z","timestamp":1760167425000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/21\/3681"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,10,26]]},"references-count":32,"journal-issue":{"issue":"21","published-online":{"date-parts":[[2021,11]]}},"alternative-id":["polym13213681"],"URL":"https:\/\/doi.org\/10.3390\/polym13213681","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,10,26]]}}}