{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T16:50:58Z","timestamp":1792601458684,"version":"4.5.0"},"reference-count":33,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,2,11]],"date-time":"2023-02-11T00:00:00Z","timestamp":1676073600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["12072212"],"award-info":[{"award-number":["12072212"]}]},{"name":"National Natural Science Foundation of China","award":["11832007"],"award-info":[{"award-number":["11832007"]}]},{"name":"National Natural Science Foundation of China","award":["12202080"],"award-info":[{"award-number":["12202080"]}]},{"name":"National Natural Science Foundation of China","award":["23NSFJQ0075"],"award-info":[{"award-number":["23NSFJQ0075"]}]},{"name":"Science &amp; Technology Support Program of Sichuan Province","award":["12072212"],"award-info":[{"award-number":["12072212"]}]},{"name":"Science &amp; Technology Support Program of Sichuan Province","award":["11832007"],"award-info":[{"award-number":["11832007"]}]},{"name":"Science &amp; Technology Support Program of Sichuan Province","award":["12202080"],"award-info":[{"award-number":["12202080"]}]},{"name":"Science &amp; Technology Support Program of Sichuan Province","award":["23NSFJQ0075"],"award-info":[{"award-number":["23NSFJQ0075"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>In this study, the main purpose is to analyze the fatigue failure of thermoplastic polyurethane (TPU) plate under tension-tension load control tests (frequency = 5 Hz, stress ratio = 0.1) and consider the change in hydrogen bond content. The results show that the S-N curve of TPU material shows a downward trend before reaching the fatigue limit (10.25 MPa), and the energy is continuously consumed during the cyclic creep process and undergoes three stages of the hard segment and the soft segment changes. The infrared spectrum study shows that the increase in fatigue life will lead to more physical crosslinking, resulting in the reduction of hydrogen bond content, and the increase in microphase separation, leading to the occurrence of fatigue fracture. In addition, the scanning electron microscope and three-dimensional confocal analysis showed that the crack originated from the aggregation of micropores on the surface of the material and was accompanied by the slip of the molecular chain, the crack propagation direction was at an angle of about 45\u00b0.<\/jats:p>","DOI":"10.3390\/polym15040899","type":"journal-article","created":{"date-parts":[[2023,2,13]],"date-time":"2023-02-13T05:59:40Z","timestamp":1676267980000},"page":"899","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":44,"title":["Cyclic Deformation and Fatigue Failure Mechanisms of Thermoplastic Polyurethane in High Cycle Fatigue"],"prefix":"10.3390","volume":"15","author":[{"given":"Shuo","family":"Wang","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering, Chengdu University, Chengdu 610106, China"},{"name":"Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610207, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sen","family":"Tang","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Chengdu University, Chengdu 610106, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2908-0986","authenticated-orcid":false,"given":"Chao","family":"He","sequence":"additional","affiliation":[{"name":"Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610207, China"},{"name":"MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingyuan","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Chengdu University, Chengdu 610106, China"},{"name":"Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610207, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1080\/15321797008068152","article-title":"Block Polymers and Related Heterophase Elastomers","volume":"4","author":"Estes","year":"1970","journal-title":"J. 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