Moment and deflection redistributions in composite plates subjected to transverse loading

摘要

A new Unite element scheme is developed, which incorporates a comprehensive constitutive material model for fiber-reinforced laminated composite (FRC) plates subjected to transverse loading. This material model is based on expressing the nonlinear secant mechanical properties as a function of the plastic strain energy density of an equivalent linear-elastic system. The model is combined with a relevant failure criterion to formulate a complete plane-stress constitutive relationship for FRC laminates up to the ultimate stress condition. The effect of material nonlinearity on the redistribution of lateral deflections and moment-resultants of FRC laminated plates is investigated. Besides, the effect of fiber-orientation and plate geometry for both linear and nonlinear analysis is also determined. In order to validate the methodology used in the present study, results of several numerical examples for various laminate configurations and material properties are compared with the corresponding available experimental data.