Nonlinear dynamic characteristics of High-entropy alloy-carbon fiber composite laminate subjected to stochastic excitation

Abstract

In the paper, a high-entropy alloy-T300 carbon fiber composite laminate is built, and its nonlinear dynamics response is studied. A developed hysteretic nonlinear model is proposed to describe the stress-strain curves of a high-entropy alloy-T300 carbon fiber composite laminate, which overcomes the disadvantage of the traditional model that are easily affected by loading rate. The dynamic model of the system subjected to stochastic excitation is set up, and the developed multi-scale method is applied to obtain the natural frequency of the system. The results of numerical simulation shows that the high-entropy alloy-T300 carbon fiber composite laminate subjected to stochastic excitation has complex dynamic characteristics, including balance point, limit cycle bifurcation and stochastic Hopf bifurcation; the structural safety of system can be enhanced through choosing the suitable parameters.