Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects
The temperature and strain rate significantly affect the ballistic performance of UHMWPE, but the deformation of UHMWPE under thermo-mechanical coupling has been rarely studied. To investigate the influences of the temperature and the strain rate on the mechanical properties of UHMWPE, a Split Hopki...
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doaj-8cc5e50e3f2f41989b6ebf5106e0eae22020-11-25T02:53:42ZengMDPI AGPolymers2073-43602020-07-01121561156110.3390/polym12071561Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate EffectsKebin Zhang0Wenbin Li1Yu Zheng2Wenjin Yao3Changfang Zhao4ZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing 210094, ChinaZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing 210094, ChinaZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing 210094, ChinaZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaThe temperature and strain rate significantly affect the ballistic performance of UHMWPE, but the deformation of UHMWPE under thermo-mechanical coupling has been rarely studied. To investigate the influences of the temperature and the strain rate on the mechanical properties of UHMWPE, a Split Hopkinson Pressure Bar (SHPB) apparatus was used to conduct uniaxial compression experiments on UHMWPE. The stress–strain curves of UHMWPE were obtained at temperatures of 20–100 °C and strain rates of 1300–4300 s<sup>−1</sup>. Based on the experimental results, the UHMWPE belongs to viscoelastic–plastic material, and a hardening effect occurs once UHMWPE enters the plastic zone. By comparing the stress–strain curves at different temperatures and strain rates, it was found that UHMWPE exhibits strain rate strengthening and temperature softening effects. By modifying the Sherwood–Frost model, a constitutive model was established to describe the dynamic mechanical properties of UHMWPE at different temperatures. The results calculated using the constitutive model were in good agreement with the experimental data. This study provides a reference for the design of UHMWPE as a ballistic-resistant material.https://www.mdpi.com/2073-4360/12/7/1561UHMWPEstrain ratetemperatureconstitutive modelSHPB |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kebin Zhang Wenbin Li Yu Zheng Wenjin Yao Changfang Zhao |
spellingShingle |
Kebin Zhang Wenbin Li Yu Zheng Wenjin Yao Changfang Zhao Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects Polymers UHMWPE strain rate temperature constitutive model SHPB |
author_facet |
Kebin Zhang Wenbin Li Yu Zheng Wenjin Yao Changfang Zhao |
author_sort |
Kebin Zhang |
title |
Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects |
title_short |
Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects |
title_full |
Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects |
title_fullStr |
Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects |
title_full_unstemmed |
Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects |
title_sort |
dynamic constitutive model of ultra-high molecular weight polyethylene (uhmwpe): considering the temperature and strain rate effects |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2020-07-01 |
description |
The temperature and strain rate significantly affect the ballistic performance of UHMWPE, but the deformation of UHMWPE under thermo-mechanical coupling has been rarely studied. To investigate the influences of the temperature and the strain rate on the mechanical properties of UHMWPE, a Split Hopkinson Pressure Bar (SHPB) apparatus was used to conduct uniaxial compression experiments on UHMWPE. The stress–strain curves of UHMWPE were obtained at temperatures of 20–100 °C and strain rates of 1300–4300 s<sup>−1</sup>. Based on the experimental results, the UHMWPE belongs to viscoelastic–plastic material, and a hardening effect occurs once UHMWPE enters the plastic zone. By comparing the stress–strain curves at different temperatures and strain rates, it was found that UHMWPE exhibits strain rate strengthening and temperature softening effects. By modifying the Sherwood–Frost model, a constitutive model was established to describe the dynamic mechanical properties of UHMWPE at different temperatures. The results calculated using the constitutive model were in good agreement with the experimental data. This study provides a reference for the design of UHMWPE as a ballistic-resistant material. |
topic |
UHMWPE strain rate temperature constitutive model SHPB |
url |
https://www.mdpi.com/2073-4360/12/7/1561 |
work_keys_str_mv |
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