Uniaxial Ratchetting Behavior at Room Temperature of Polyether-Ether-Ketone

ZHOU Min; YUAN Jianghong; KANG Guozheng

doi:10.11973/jxgccl202301003

Materials and Mechanical Engineering > 2023 > 47(1): 19-25,33. > DOI: 10.11973/jxgccl202301003

ZHOU Min, YUAN Jianghong, KANG Guozheng. Uniaxial Ratchetting Behavior at Room Temperature of Polyether-Ether-Ketone[J]. Materials and Mechanical Engineering, 2023, 47(1): 19-25,33. DOI: 10.11973/jxgccl202301003

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Uniaxial Ratchetting Behavior at Room Temperature of Polyether-Ether-Ketone

Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics andAerospace Engineering, Southwest Jiaotong University, Chengdu 611756, China

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Received Date: January 20, 2022
Revised Date: December 05, 2022

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Abstract

A series of asymmetric stress-controlled uniaxial cyclic tests were performed on polyether-ether-ketone (PEEK) at room temperature, and the influence laws of stress level, loading history, stress rate and peak-stress holding time on the ratchetting behavior were studied. The results show that the PEEK exhibited obvious ratchetting behavior during the asymmetric stress cyclic loading, and the ratchetting strain consisted of the recoverable viscoelastic strain and the irrecoverable viscoplastic strain. Both the ratchetting strain and its rate increased with stress level. The ratchetting behavior of PEEK had an obvious loading history effect; the loading history under high mean stresses suppressed the ratchetting deformation in the subsequent cycle process under low mean stresses, and the loading history under low mean stresses had little effect on the ratchetting deformation in the subsequent cycle process under high mean stresses. The ratchetting behavior of PEEK showed obvious time-dependence; the lower the stress rate and the longer the peak-stress holding time, the larger the ratchetting strain.
- polyether-ether-ketone,
- ratchetting behavior,
- viscoelastic deformation,
- viscoplastic deformation,
- loading history effect,
- time-dependence

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References (29)

References

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