Plastic deformation of polymeric-coated aluminum plates subjected to gas mixture detonation loading: Part II: Analytical and empirical modelling

Authors

Mechanical engineering, Faculty of Engineering, University of Eyvanekey, Garmsar, Iran

Abstract

In this research, a series of experiments were first performed to evaluate the plastic deformation of rectangular aluminum plates reinforced by polymeric coating under gas mixture detonation loading. Four different types of thickness configurations were chosen to investigate the effect of front and back layer thicknesses on the deformation resistance of metal-elastomer bilayer structures. In the analytical modelling, a model for predicting the maximum permanent deflection of metal-elastomer bilayer structures was presented. Also, in the empirical modelling, a number of new dimensionless numbers were presented by nondimensionalizing the governing equations of plate based on dimensional analysis in which each dimensionless number represents the geometry of the structure, the ratio of applied dynamic loads to the resistance ability of material, and the dynamic resistance ability of material against plastic deformation. Mathematical functions were presented to predict the maximum permanent deflection of structures by converting the experimental data into the form of dimensionless numbers as well as using singular value decomposition method. Subsequently, the presented empirical models were verified by the conducted experimental results. The results indicated an encouraging agreement between the experimental results and empirical predictions in terms of the maximum permanent deflection.

Keywords

Main Subjects


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