Nonlinear dynamics of bistable rectangular asymmetric composite laminate: Theory, simulation and experiment

Abstract

Rectangular bistable composite laminate is an asymmetric double potential well system, which leads to inconsistent mechanical properties between the two stable states and diverse dynamic phenomena that rarely observed. It is interesting yet challenging to reveal the nonlinear effect of asymmetric geometry on the structural dynamic design. This study investigates the nonlinear analysis of rectangular asymmetric bistable composite laminate with the stacking sequence of [0_n/90_n], a subject that received considerably less attention compared to its square counterparts, and most existing research has predominantly concentrated on static properties and dynamic snap-through behaviors. The present study shifts the focus to the variation of the overall dynamic characteristics with respect to excitation level and frequency, and emphasizes the conditions where dynamic snap-through occurs, thereby contributing to the promotion of configuration control in the realm of deformable structures. Additionally, the stacking sequence of [0_m/90_n] is considered complementally, with a particular focus on the asymmetric numbers of oriented layers with the different angle—a configuration that has not been previously explored. The investigation herein provides significant potentials for the inspiring applications of morphing structure and energy harvesting.