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However, the design of metamaterials with prescribed nonlinear mechanical properties is challenging due to the difficulty in accurately predicting nonlinear mechanical responses such as buckling and self\u2010contact, as well as geometric and material uncertainties. Herein, additive manufacturing (AM) with machine learning (ML) to demonstrate data\u2010driven modeling and the design of nonlinear elastomeric springs with a broad stress plateau is combined. 243 elastomer chi (<jats:italic>\u03c7<\/jats:italic>) spring parts with different design parameters fabricated by AM are tested. A Gaussian process (GP) model is trained on key features of the measured mechanical response and predicts the mechanical response within a 3% error with as few as 97 parts. To account for the geometric and material uncertainties, the GP model to develop an uncertainty\u2010aware design optimization approach to tailor the mechanical response based on the covariance matrix adaptation evolution strategy (CMA\u2010ES) is utilized. Excellent agreement is demonstrated between the designed response and measured response over the range of plateau stress considered. The research illustrates the promise of experimental data\u2010driven approaches and AM in enabling complex material design.<\/jats:p><\/jats:sec>","DOI":"10.1002\/aisy.202200225","type":"journal-article","created":{"date-parts":[[2022,11,6]],"date-time":"2022-11-06T22:06:24Z","timestamp":1667772384000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Modeling and Design of Zero\u2010Stiffness Elastomer Springs Using Machine Learning"],"prefix":"10.1002","volume":"4","author":[{"given":"Hyeongkeun","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Mechanical Science and Engineering University of Illinois Urbana-Champaign  Urbana IL 61801 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sameh H.","family":"Tawfick","sequence":"additional","affiliation":[{"name":"Department of Mechanical Science and Engineering University of Illinois Urbana-Champaign  Urbana IL 61801 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8606-1290","authenticated-orcid":false,"given":"William P.","family":"King","sequence":"additional","affiliation":[{"name":"Department of Mechanical Science and Engineering University of Illinois Urbana-Champaign  Urbana IL 61801 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,11,6]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms5130"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1098\/rspa.1982.0087"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201501708"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201502809"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202101428"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41578-018-0002-2"},{"key":"e_1_2_8_8_1","volume-title":"Polymer Foams Handbook","author":"Mills N.","year":"2007"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1080\/15583724.2021.1897996"},{"key":"e_1_2_8_10_1","volume-title":"Cellular Solids: Structure and Properties","author":"Gibson L. 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