Abstract
Cavity bifurcation is an important mechanism of damage and fracture failure of various materials. The thermal cavitation problem of a composite sphere composed of two kinds of viscoelastic materials subjected to a uniform temperature field was studied in this paper. Based on the finite deformation dynamics theory, a nonlinear mathematical model describing cavity movement in a composite sphere was established by employing the Kelvin–Voigt constitutive equation of thermo-viscoelasticity. Adopting the dimensionless transformation, a parametric cavitated bifurcation solution describing the cavity radius with the temperature was obtained. The dynamic variation curves of the cavity radius, which increase with external temperature, radius ratios, and material parameters, were also discussed. It was proved that the dynamic growth of an infinitely large sphere, including a small sphere, can be achieved by a finitely composite sphere.
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We are also very grateful to the reviewers for their suggestions and opinions on the revision of the manuscript.
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The research of this thesis was supported by the National Natural Science Foundation Project (No. 10772024) and the Open Fund Project of State Key Laboratory of Explosive Science and Technology (No. 185 KFJJ12-12M).
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YaJuan Chen and XinChun Shang wrote the main manuscript text and figures. All authors reviewed the manuscript.
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Chen, Y., Shang, X. Analysis of thermal cavitation in a viscoelastic composite sphere under a uniform temperature field. Mech Time-Depend Mater (2023). https://doi.org/10.1007/s11043-023-09630-y
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DOI: https://doi.org/10.1007/s11043-023-09630-y