Parametric analysis of pseudo-shakedown behaviour of plates under repeated impacts

Abstract

This article conducts a parametric analysis to investigate how dynamic material properties, plate dimensions, and boundary conditions affect the pseudo-shakedown behaviour of plates under repeated impacts. Validated numerical simulation methods are employed for this analysis. Different constitutive equations accounting for strain rate effects are used to vary dynamic material properties. Plate dimensions are varied in terms of aspect ratios and plate thicknesses. Various boundary conditions, including fully fixed boundary and conditions allowing in-plane sliding, are considered. The analysis reveals that strain rate effects, plate dimensions and boundary conditions significantly affect the pseudo-shakedown response to repeated impacts. A discussion is made on the challenges and considerations in accurately modelling strain rate effects and boundary conditions in numerical simulations. The findings of this parametric analysis are useful for designing ship plates to withstand repeated impacts, when incorporating pseudo-shakedown concept in design strategies.