Abstract
In this research, the hyperelastic strain energy density function based on the exponential–logarithmic invariant is extended to the visco-hyperelastic constitutive model to describe the mechanical characteristics of the rate dependence and large deformations of rubber-like materials. On the basis of the general regression neural network (GRNN) technique, a parameter identification approach for the visco-hyperelastic model is designed. In addition, the proposed research scheme is verified using various uniaxial experimental data of rubber-like materials. The comparison results reveal that the predicted stress responses agree well with the experimental data under different loading conditions. This paper concludes that the present model can describe the mechanical behavior of rubber-like materials and that the GRNN-based approach is practicable for parameter identification of complex visco-hyperelastic constitutive models.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 12172270), the Qin Chuangyuan “Scientists+Engineers” Team Construction Project in Shaanxi Province (2022KXJ-085), and the Fundamental Research Funds for the Central Universities in China, the Application Innovation Program of China Aerospace Science and Technology Corporation (No. 6230112002) and the Basic Research Priorities Program from Equipment Development Department of China (No. 514010304-302-2).
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Chen, S., Wang, C., Lu, X. et al. A parameter identification scheme of the visco-hyperelastic constitutive model of rubber-like materials based on general regression neural network. Arch Appl Mech 93, 3229–3241 (2023). https://doi.org/10.1007/s00419-023-02434-z
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DOI: https://doi.org/10.1007/s00419-023-02434-z