A series of uniaxial tests (including multilevel loading–unloading recovery, creep-recovery, and cyclic tension–compression/tension ones) were performed to investigate the monotonic and cyclic viscoelastic–viscoplastic deformations of polycarbonate (PC) polymer at room temperature. The results show that the PC exhibits strong nonlinearity and rate-dependence, and obvious ratchetting occurs during the stress-controlled cyclic tension–compression/tension tests with nonzero mean stress, which comes from both the viscoelasticity and viscoplasticity of the PC. Based on the experimental observation, a nonlinear viscoelastic–viscoplastic cyclic constitutive model is then constructed. The viscoelastic part of the proposed model is constructed by extending the Schapery's nonlinear viscoelastic model, and the viscoplastic one is established by adopting the Ohno–Abdel-Karim's nonlinear kinematic hardening rule to describe the accumulation of irrecoverable viscoplastic strain produced during cyclic loading. Furthermore, the dependence of elastic compliance of the PC on the accumulated viscoplastic strain is considered. Finally, the capability of the proposed model is verified by comparing the predicted results with the corresponding experimental ones of the PC. It is shown that the proposed model provides reasonable predictions to the various deformation characteristics of the PC presented in the multilevel loading–unloading recovery, creep-recovery, and cyclic tension–compression/tension tests.
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April 2016
Research-Article
Viscoelastic–Viscoplastic Cyclic Deformation of Polycarbonate Polymer: Experiment and Constitutive Model
Chao Yu,
Chao Yu
State Key Laboratory of Traction Power,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China;
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China;
Applied Mechanics and Structure Safety Key
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Search for other works by this author on:
Guozheng Kang,
Guozheng Kang
State Key Laboratory of Traction Power,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China;
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China;
Applied Mechanics and Structure Safety Key
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
e-mails: guozhengkang@home.swjtu.edu.cn;
guozhengkang@126.com
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
e-mails: guozhengkang@home.swjtu.edu.cn;
guozhengkang@126.com
Search for other works by this author on:
Fucong Lu,
Fucong Lu
Applied Mechanics and Structure Safety Key
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Search for other works by this author on:
Yilin Zhu,
Yilin Zhu
School of Architectural and Civil Engineering,
Chengdu University,
Chengdu, Sichuan 610106, China
Chengdu University,
Chengdu, Sichuan 610106, China
Search for other works by this author on:
Kaijuan Chen
Kaijuan Chen
Applied Mechanics and Structure Safety Key
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Search for other works by this author on:
Chao Yu
State Key Laboratory of Traction Power,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China;
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China;
Applied Mechanics and Structure Safety Key
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Guozheng Kang
State Key Laboratory of Traction Power,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China;
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China;
Applied Mechanics and Structure Safety Key
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
e-mails: guozhengkang@home.swjtu.edu.cn;
guozhengkang@126.com
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
e-mails: guozhengkang@home.swjtu.edu.cn;
guozhengkang@126.com
Fucong Lu
Applied Mechanics and Structure Safety Key
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Yilin Zhu
School of Architectural and Civil Engineering,
Chengdu University,
Chengdu, Sichuan 610106, China
Chengdu University,
Chengdu, Sichuan 610106, China
Kaijuan Chen
Applied Mechanics and Structure Safety Key
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
Laboratory of Sichuan Province,
School of Mechanics and Engineering,
Southwest Jiaotong University,
Chengdu, Sichuan 610031, China
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received October 25, 2015; final manuscript received December 21, 2015; published online January 18, 2016. Editor: Yonggang Huang.
J. Appl. Mech. Apr 2016, 83(4): 041002 (14 pages)
Published Online: January 18, 2016
Article history
Received:
October 25, 2015
Revised:
December 21, 2015
Citation
Yu, C., Kang, G., Lu, F., Zhu, Y., and Chen, K. (January 18, 2016). "Viscoelastic–Viscoplastic Cyclic Deformation of Polycarbonate Polymer: Experiment and Constitutive Model." ASME. J. Appl. Mech. April 2016; 83(4): 041002. https://doi.org/10.1115/1.4032374
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