| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Dynamic mechanical response of polystyrene at high strain rates under uniaxial strain ramp loading |
| Xuping Zhang(张旭平)1,†, Fuli Tan(谭福利)1, Binqiang Luo(罗斌强)1, Guiji Wang(王桂吉)1, Jianheng Zhao(赵剑衡)2, and Chengwei Sun(孙承纬)1 |
1 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China;
2 Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621999, China |
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Abstract Determination of the yield strength of polymers under dynamic loading has proven to be extremely difficult. Until now, few strength data have been obtained for polymers at strain rates above 10$^{5}$ s$^{-1}$. Based on the electromagnetically driven quasi-isentropic loading technique, the yield strength of polystyrene under high pressure and high strain rate is measured experimentally using a pressure comparison method. In the experiment, a polystyrene window method is used to measure the in-situ particle velocity directly, which reduces the experimental error and obtains reliable high-pressure Lagrangian sound velocity and a quasi-isentropic compression line. The yield stress of polystyrene under quasi-isentropic compression is measured continuously at pressure up to 4 GPa and a strain rate of 10$^{6}$ s$^{-1}$. Combined with strength data under quasi-static and intermediate strain rate loading, the strain rate effect of the yield of polystyrene is analyzed. It is found that the yield strength of polystyrene shows strain rate effects, but the "up-turn" phenomenon is not observed. Additionally, the yield stress of polystyrene from 10$^{-3}$ s$^{-1}$ to 10$^{6}$ s$^{-1}$ strain rate can be fitted using the Eyring model, which provides a reference for the study of the physical properties of polymer materials under high strain rate loading.
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Received: 12 June 2025
Revised: 25 August 2025
Accepted manuscript online: 12 September 2025
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PACS:
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62.50.-p
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(High-pressure effects in solids and liquids)
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51.30.+i
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(Thermodynamic properties, equations of state)
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62.20.-x
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(Mechanical properties of solids)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos. 12272364 and 12002327). |
Corresponding Authors:
Xuping Zhang
E-mail: xupingzhang@sina.cn
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Cite this article:
Xuping Zhang(张旭平), Fuli Tan(谭福利), Binqiang Luo(罗斌强), Guiji Wang(王桂吉), Jianheng Zhao(赵剑衡), and Chengwei Sun(孙承纬) Dynamic mechanical response of polystyrene at high strain rates under uniaxial strain ramp loading 2026 Chin. Phys. B 35 046201
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