Elasto-Plastic Constitutive Behaviour Prediction and Uncertainty Quantification of Damaged Composite Structure under High-Strain Rate Loading

Abstract

Abstract The current research assesses the consequences of various damages (crack and delamination) and high-strain loading conditions on the fibre-reinforced composite structure's elasto-plastic stress-strain (EPSS) characteristics. The constitutive responses are obtained numerically (finite element discretization) using higher-order polynomials (to count the deformation) with the help of the MATLAB platform. The EPSS responses are evaluated via the modified Ludwik equation and Cowper Symonds model under high strain rate loadings. The model accuracy has been tested through the comparison between the present numerical and the published experimental data available in open domain. Furthermore, various numerical examples present the effect of damages (debond and/or crack), forces and stress-strain characteristics for a wide range of strain rates (ranging from 0.001 s−1 to 50 s−1). The stochastic constitutive model is obtained to show the modelling importance and the corresponding analysis parameters including the uncertainty quantification. Finally, a detailed understanding of the damages and geometries on the polymeric composite structure are enumerated via the delve model for the futuristic design.