Aditi Chattopadhyay

Abstract: A new higher order plate theory for modeling delamination buckling and postbuckling of composite laminates is developed Delaminations between layers of composite plates are modeled by jump discontinuity conditions, in both lower and higher order terms of displacements, at the delaminated interfaces Some higher order terms are identified at the beginning of the formulation by using the conditions that shear stresses vanish at all free surfaces including the delaminated interfaces Therefore, all boundary conditions for displacements and stresses are satisfied in the present theory Geometric nonlinearity is included in computing layer buckling The general governing equations, along with all boundary and continuity conditions of plates, are derived for predicting the delamination buckling and postbuckling behavior The associated delamination growth problem is also examined by the use of Griffith-type fracture criterion A numerical example is presented to validate the theory The results are also compared with experimentally obtained data

TL;DR: In this paper, a generalized layerwise finite element model is developed to model the presence of multiple finite delamination in laminated composites, which accurately predicts the interlaminar shear stresses while maintaining computational efficiency.

TL;DR: In this paper, a higher order shear deformation theory is used to investigate the instability associated with composite plates subject to dynamic loads, both transverse shear and rotary inertia effects are taken into account.

TL;DR: In this article, a procedure has been developed to investigate the dynamic response of composite structures, with embedded multiple delaminations, with a recently developed improved layerwise composite laminate theory is extended to model composite laminates of moderately large thickness with delamination.

TL;DR: In this paper, a completely coupled thermo-piezoelectricmechanical theory is developed to model the dynamic response of composite plates with surface bonded piezoclectric actuators, and the results obtained using this model are correlated with those using an uncoupled model.