D. Roy Mahapatra

TL;DR: In this paper, a spectral finite element model (SFEM) for analysis of coupled broadband wave propagation in composite tubular structure is presented, where wave motions in terms of three translational and three rotational degrees of freedom at tube cross-section are considered based on first order shear flexible cylindrical bending, torsion and secondary warping.

TL;DR: In this article, an ultrasonic wave propagation in graphene sheet is studied using nonlocal elasticity theory incorporating small scale effects and the explicit expressions for cutoff frequencies and escape frequencies are derived.

TL;DR: In this article, the effect of lattice orientation and crack length on the mechanical properties of Graphene is studied based on molecular dynamics simulations, and three recurrent fracture patterns are reported.

TL;DR: In this paper, a spectral finite element model (SFEM) is developed to study the effect of wave scattering and power flow through multiple delaminations and strip inclusions in composite beams with general ply stacking sequence.

TL;DR: In this article, a multi-layer perceptron (MLP) network using error back propagation algorithm is employed to estimate the damage parameters from broad-band spectral data as diagnostic signal Various existing models of damage in laminated composite and the resulting stiffness degradation are discussed from comparative viewpoint Degradation of ply properties can be considered to be one of the damage model parameters while monitoring transverse matrix cracks in cross-ply, splitting in longitudinal ply, and evolution of consecutive stages of damage, such as delaminations and fiber fracture.