| Autor: |
Du, Zhenjiang, Yang, Yan, Wang, Zhongtong, Fan, Xinggui, Lu, Tongqing |
| Zdroj: |
Acta Mechanica Sinica; Mar2023, Vol. 39 Issue 3, p1-8, 8p |
| Abstrakt: |
Many rubber-like materials exhibit hyperelastic, time-dependent, rate-dependent and progressive damage behaviors. In our previous work (Lu et al., 2020), we proposed a hyperelastic damage model to characterize the strain-softening behavior of soft materials. The model modifies the strain energy function of a single chain by introducing an internal damage variable D and then maps the deformation of chains to the macroscopic deformation. In this work, we extend this model to incorporate the time-dependent viscous effect using the Prony series-based nonlinear theory. We further implement the finite strain visco-hyperelastic damage model into finite element software ABAQUS by a user material subroutine UMAT. We use the experimental data of a kind of acrylic polymer under uniaxial tension in literature to calibrate the model parameters, including 4 time-independent parameters and 6 time-dependent parameters. We then use the calibrated parameters to simulate the uniaxial tension and stress relaxation of the acrylic polymer specimen with a complex geometry. The simulated results agree with the experimental data with a remarkable accuracy. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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