Dynamic Response of a Multilayer Corrugated Structure with History-Dependent Properties Subjected to Transient Loads

摘要

Composite corrugated- or honeycomb-type multilayer structures are considered for the use as cushioning elements for protection against shocks and vibration. Numerical model for prediction of the dynamic response of such structures to obtain the cushioning response maps and shock response spectrum maps in order to select the optimum static stress is presented, and results of simulations are discussed. Initial deformation characteristics of layers in these composite structures vary, from predominantly elastic to predominantly plastic. At any instant the behaviour of individual layers depends on the recent deformation history and is also being affected by the current behaviour of other layers. The model was developed in Simulink and the approach was guided by experimental results, including high-speed videography. The model replicates the chaotic behaviour of individual layers and predicted shock pulses are similar to those obtained experimentally.