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Generalized hyper-viscoelastic modeling and experimental characterization of unfilled and carbon black filled natural rubber for civil structural applications
https://orcid.org/0000-0003-0538-7091
Highlights A generalized constitutive model of unfilled and carbon black filled natural rubber is proposed. The model can capture the hyper-viscoelastic behavior of rubber materials for civil structural applications. A novel strain energy function and a nonlinear viscosity coefficient are introduced in the model. The accuracy of the model is validated at material level and structural component level.
Abstract Unfilled and carbon black filled natural rubber have attracted considerable attention and have been extensively used as a novel construction material in civil infrastructure applications because of their superior physical and mechanical properties. However, their mechanical behavior is highly nonlinear and further complicated by the significant sensitivity to the loading rate. In this paper, a generalized constitutive model was proposed to improve the description of rate-dependent mechanical behavior of unfilled and carbon black filled natural rubber. The proposed model consisted of a hyperelastic spring to characterize the equilibrium response and a Maxwell element to capture the rate dependency as well as link the overstress to the loading rate. Subsequently, the stress–strain response of both unfilled and filled natural rubber subjected to the cyclic shear loading with different strain rates was experimentally characterized, multi-step relaxation and cyclic shear tests were carried out to calibrate material parameters in the model. Afterwards, a nonlinear viscosity coefficient was derived to completely establish the proposed model and its three-dimensional function versus strain and strain rate was also obtained based on the experimental data. Finally, comparing numerical simulations with cyclic shear tests and real-time hybrid simulation tests, it was found that the simulated results were in good agreement with the test results, indicating the proposed model is capable to accurately describe the hyper-viscoelastic behavior of both unfilled and filled natural rubber under cyclic shear loading, which might become an appropriate choice to be used by researchers and engineers for civil structural applications.
Generalized hyper-viscoelastic modeling and experimental characterization of unfilled and carbon black filled natural rubber for civil structural applications
https://orcid.org/0000-0003-0538-7091
Highlights A generalized constitutive model of unfilled and carbon black filled natural rubber is proposed. The model can capture the hyper-viscoelastic behavior of rubber materials for civil structural applications. A novel strain energy function and a nonlinear viscosity coefficient are introduced in the model. The accuracy of the model is validated at material level and structural component level.
Abstract Unfilled and carbon black filled natural rubber have attracted considerable attention and have been extensively used as a novel construction material in civil infrastructure applications because of their superior physical and mechanical properties. However, their mechanical behavior is highly nonlinear and further complicated by the significant sensitivity to the loading rate. In this paper, a generalized constitutive model was proposed to improve the description of rate-dependent mechanical behavior of unfilled and carbon black filled natural rubber. The proposed model consisted of a hyperelastic spring to characterize the equilibrium response and a Maxwell element to capture the rate dependency as well as link the overstress to the loading rate. Subsequently, the stress–strain response of both unfilled and filled natural rubber subjected to the cyclic shear loading with different strain rates was experimentally characterized, multi-step relaxation and cyclic shear tests were carried out to calibrate material parameters in the model. Afterwards, a nonlinear viscosity coefficient was derived to completely establish the proposed model and its three-dimensional function versus strain and strain rate was also obtained based on the experimental data. Finally, comparing numerical simulations with cyclic shear tests and real-time hybrid simulation tests, it was found that the simulated results were in good agreement with the test results, indicating the proposed model is capable to accurately describe the hyper-viscoelastic behavior of both unfilled and filled natural rubber under cyclic shear loading, which might become an appropriate choice to be used by researchers and engineers for civil structural applications.
Generalized hyper-viscoelastic modeling and experimental characterization of unfilled and carbon black filled natural rubber for civil structural applications
https://orcid.org/0000-0003-0538-7091
Highlights A generalized constitutive model of unfilled and carbon black filled natural rubber is proposed. The model can capture the hyper-viscoelastic behavior of rubber materials for civil structural applications. A novel strain energy function and a nonlinear viscosity coefficient are introduced in the model. The accuracy of the model is validated at material level and structural component level.
Abstract Unfilled and carbon black filled natural rubber have attracted considerable attention and have been extensively used as a novel construction material in civil infrastructure applications because of their superior physical and mechanical properties. However, their mechanical behavior is highly nonlinear and further complicated by the significant sensitivity to the loading rate. In this paper, a generalized constitutive model was proposed to improve the description of rate-dependent mechanical behavior of unfilled and carbon black filled natural rubber. The proposed model consisted of a hyperelastic spring to characterize the equilibrium response and a Maxwell element to capture the rate dependency as well as link the overstress to the loading rate. Subsequently, the stress–strain response of both unfilled and filled natural rubber subjected to the cyclic shear loading with different strain rates was experimentally characterized, multi-step relaxation and cyclic shear tests were carried out to calibrate material parameters in the model. Afterwards, a nonlinear viscosity coefficient was derived to completely establish the proposed model and its three-dimensional function versus strain and strain rate was also obtained based on the experimental data. Finally, comparing numerical simulations with cyclic shear tests and real-time hybrid simulation tests, it was found that the simulated results were in good agreement with the test results, indicating the proposed model is capable to accurately describe the hyper-viscoelastic behavior of both unfilled and filled natural rubber under cyclic shear loading, which might become an appropriate choice to be used by researchers and engineers for civil structural applications.
Generalized hyper-viscoelastic modeling and experimental characterization of unfilled and carbon black filled natural rubber for civil structural applications
Wei, Wei (author) / Yuan, Yong (author) / Igarashi, Akira (author) / Zhu, Hongping (author) / Luo, Kaitao (author)
2020-04-13
Article (Journal)
Electronic Resource
English
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