A repeated yielding model under periodic perturbation. (English) Zbl 1422.34175
Summary: The Ananthakrishna model, seeking to explain the phenomenon of repeated yielding of materials, is studied with or without periodic perturbation. For the unforced model, Hopf bifurcation, degenerate Hopf bifurcation and saddle-node bifurcation are detected. For the periodically forced model, two elementary periodic mechanisms are analyzed corresponding to five bifurcation cases of the unforced one. Rich dynamical behaviors arise, including stable and unstable periodic solutions of different periods, quasi-periodic solutions, chaos through torus destruction or cascade of period doublings. Moreover, even small change of a parameter can lead to bifurcation of different periodic solutions. Finally, according to the forced Ananthakrishna model, four types of stress-time curves are simulated, which can well interpret various experimental phenomena of repeated yielding.
MSC:
| 34E10 | Perturbations, asymptotics of solutions to ordinary differential equations |
| 34C23 | Bifurcation theory for ordinary differential equations |
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