 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 11262 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8011
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| In English (Mech. Solids): | | 3251 |
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| Qiaoguo Wu, Bingqiang Zhang, Baozhen Wang, Jianhua Pan, and Gang Dong, "Dynamic Tensile Behavior of Polyamide 6 at Different Strain Rates: Experiments and Constitutive Model," Mech. Solids. 58 (9), 3288-3301 (2023) |
| Year |
2023 |
Volume |
58 |
Number |
9 |
Pages |
3288-3301 |
| DOI |
10.3103/S0025654423601209 |
| Title |
Dynamic Tensile Behavior of Polyamide 6 at Different Strain Rates: Experiments and Constitutive Model |
| Author(s) |
Qiaoguo Wu (College of Civil Engineering, Hefei University of Technology, Hefei, 230009 China)
Bingqiang Zhang (College of Civil Engineering, Hefei University of Technology, Hefei, 230009 China)
Baozhen Wang (College of Civil Engineering, Hefei University of Technology, Hefei, 230009 China, bzwang@hfut.edu.cn)
Jianhua Pan (Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei, 230009 China)
Gang Dong (College of Civil Engineering, Hefei University of Technology, Hefei, 230009 China) |
| Abstract |
This work studies the tensile behavior of polyamide 6 (PA6) at different strain rates using both experimental and numerical methods. Quasi-static and dynamic tensile tests are performed using a universal testing machine and a split Hopkinson tensile bar (SHTB). The stress-strain curves and specimen morphologies are obtained over a wide range of strain rates from 2.6×10−4 s−1 to 900 s−1. The tensile behavior of PA6 is sensitive to strain rate, and the yield strength and yield strain both increase with an increase of strain rate. The plastic stage of PA6 exhibits strain hardening characteristics under quasi-static loading, but strain softening characteristics under dynamic loading. The strain softening characteristics become more significant with an increase of strain rate. The quasi-static tensile mechanical responses of PA6 are analyzed by a ZWT viscoelastic constitutive model, while the dynamic ones are analyzed by a ZWT model with a damage factor. The experimental stress-strain curves are well described by the constitutive model. Three-dimensional incremental expressions of the constitutive model are given, and a user-defined constitutive subroutine is written. Numerical simulations on the stress wave propagation process and the stress-strain curves of PA6 under SHTB loading are conducted, with results that are consistent with the experiments. |
| Keywords |
polyamide, tensile behavior, strain rate, experimental testing, constitutive model |
| Received |
18 July 2023 | Revised |
03 November 2023 | Accepted |
07 November 2023 |
| Link to Fulltext |
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