{"title":"聚酰胺-6 在不同温度和应变率下的动态压缩行为和构成模型","authors":"Bingqiang Zhang, Qiaoguo Wu, Lei Zu, Baozhen Wang, Qian Zhang, Guiming Zhang, Jianhui Fu, Lichuan Zhou","doi":"10.1007/s00707-024-03997-w","DOIUrl":null,"url":null,"abstract":"<div><p>This study investigates the quasi-static and dynamic compressive mechanical properties of polyamide-6 at different temperatures (25–85 ℃) and strain rates (2.6 × 10<sup>−4</sup>–3.2 × 10<sup>3</sup> s<sup>−1</sup>) by using a universal testing machine and a split Hopkinson pressure bar device. The variation of mechanical properties with temperature and strain rate is analyzed. The results show that the stress–strain response of polyamide-6 at different temperatures and strain rates includes viscoelastic deformation, yield behavior, and strain hardening behavior. Under some experimental conditions, polyamide-6 has constant stress flow states, which are related to temperature and strain rate. The mechanical properties of polyamide-6 are significantly affected by temperature and strain rate. The elastic modulus, yield strength, and energy absorption property increase with an increase of strain rate, but decrease with an increase of temperature. The formulas of yield strength and elastic modulus are given, and a modified constitutive model is given to describe the stress–strain response of polyamide-6. The predicted results of the model are in good agreement with the experimental data at different temperatures and strain rates.</p></div>","PeriodicalId":456,"journal":{"name":"Acta Mechanica","volume":"235 8","pages":"5411 - 5430"},"PeriodicalIF":2.3000,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dynamic compressive behavior and constitutive model of polyamide-6 at different temperatures and strain rates\",\"authors\":\"Bingqiang Zhang, Qiaoguo Wu, Lei Zu, Baozhen Wang, Qian Zhang, Guiming Zhang, Jianhui Fu, Lichuan Zhou\",\"doi\":\"10.1007/s00707-024-03997-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study investigates the quasi-static and dynamic compressive mechanical properties of polyamide-6 at different temperatures (25–85 ℃) and strain rates (2.6 × 10<sup>−4</sup>–3.2 × 10<sup>3</sup> s<sup>−1</sup>) by using a universal testing machine and a split Hopkinson pressure bar device. The variation of mechanical properties with temperature and strain rate is analyzed. The results show that the stress–strain response of polyamide-6 at different temperatures and strain rates includes viscoelastic deformation, yield behavior, and strain hardening behavior. Under some experimental conditions, polyamide-6 has constant stress flow states, which are related to temperature and strain rate. The mechanical properties of polyamide-6 are significantly affected by temperature and strain rate. The elastic modulus, yield strength, and energy absorption property increase with an increase of strain rate, but decrease with an increase of temperature. The formulas of yield strength and elastic modulus are given, and a modified constitutive model is given to describe the stress–strain response of polyamide-6. The predicted results of the model are in good agreement with the experimental data at different temperatures and strain rates.</p></div>\",\"PeriodicalId\":456,\"journal\":{\"name\":\"Acta Mechanica\",\"volume\":\"235 8\",\"pages\":\"5411 - 5430\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-06-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Mechanica\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00707-024-03997-w\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Mechanica","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s00707-024-03997-w","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MECHANICS","Score":null,"Total":0}
Dynamic compressive behavior and constitutive model of polyamide-6 at different temperatures and strain rates
This study investigates the quasi-static and dynamic compressive mechanical properties of polyamide-6 at different temperatures (25–85 ℃) and strain rates (2.6 × 10−4–3.2 × 103 s−1) by using a universal testing machine and a split Hopkinson pressure bar device. The variation of mechanical properties with temperature and strain rate is analyzed. The results show that the stress–strain response of polyamide-6 at different temperatures and strain rates includes viscoelastic deformation, yield behavior, and strain hardening behavior. Under some experimental conditions, polyamide-6 has constant stress flow states, which are related to temperature and strain rate. The mechanical properties of polyamide-6 are significantly affected by temperature and strain rate. The elastic modulus, yield strength, and energy absorption property increase with an increase of strain rate, but decrease with an increase of temperature. The formulas of yield strength and elastic modulus are given, and a modified constitutive model is given to describe the stress–strain response of polyamide-6. The predicted results of the model are in good agreement with the experimental data at different temperatures and strain rates.
期刊介绍：
Since 1965, the international journal Acta Mechanica has been among the leading journals in the field of theoretical and applied mechanics. In addition to the classical fields such as elasticity, plasticity, vibrations, rigid body dynamics, hydrodynamics, and gasdynamics, it also gives special attention to recently developed areas such as non-Newtonian fluid dynamics, micro/nano mechanics, smart materials and structures, and issues at the interface of mechanics and materials. The journal further publishes papers in such related fields as rheology, thermodynamics, and electromagnetic interactions with fluids and solids. In addition, articles in applied mathematics dealing with significant mechanics problems are also welcome.
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