Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2023 , Vol. 57 >Issue 8: 1086 - 1095

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2022.022

Materials Science and Engineering

A Visco-Elastoplastic Constitutive Model of Uncured Rubber and Its Finite Element Implementation

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  • 1. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
    2. CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China
    3. Wuhan Second Ship Design and Research Institute, Wuhan 430205, China

Received date: 2022-01-24

  Revised date: 2022-04-07

  Accepted date: 2022-05-05

  Online published: 2022-08-23

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Abstract

In order to investigate the mechanical properties of uncured rubber, uniaxial and cyclic tensile experiments are conducted on uncured rubber at different strain rates. From the experimental results, the rate-dependent nonlinear mechanical behaviors of uncured rubber can be clearly observed. With strain rate increasing, the stress level, hysteresis and Mullins effect get enhanced, and the residual strain decreases. To characterize the nonlinear visco-elastoplastic mechanical behaviors of uncured rubber, a three-network (TN) constitutive model that contains a hyperelastic network and two nonlinear viscoplastic networks is proposed. The eight-chain model is used to characterize the hyperelastic behavior while the Bergstr?m-Boyce flow model is applied in the viscoplastic networks to capture the nonlinear viscous flow. The proposed constitutive model is implanted into the finite element software Abaqus with which, the multistep tensile relaxation test is simulated. The simulation result is satisfactorily consistent with experimental results, which verifies the effectiveness of the TN model. Finally, the simplified molding process of a tire tread is simulated, which further verifies the stability of the TN model.

Key words： uncured rubber; tensile experiments; constitutive model; viscoelasticity; finite element implementation

Cite this article

WANG Yinlong, LI Zhao, LI Ziran, WANG Yang . A Visco-Elastoplastic Constitutive Model of Uncured Rubber and Its Finite Element Implementation[J]. Journal of Shanghai Jiaotong University, 2023 , 57(8) : 1086 -1095 . DOI: 10.16183/j.cnki.jsjtu.2022.022

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