Krishanu Ganguly

• Doctor of Philosophy
• Researcher at Indian Institute of Technology Delhi

Support characteristics (stiffness and dissipation) are well understood to influence the dynamic behaviour of rotors. Supports play an essential role in deciding the stability and response of the rotors. Therefore, frequency-dependent support characteristics are beneficial in determining the rotor response as the frequency of excitation keeps chang...

The present research focuses on proposing a novel theoretical micromechanical model (TMM) designed to derive the frequency-dependent storage and loss moduli of woven fabric (WF)-matrix composites, as well as WF-particulate matrix (Hybrid) composites, based on their constituent properties. The TMM serves as a higher-order modulus operator, accountin...

Modern engineering eventually suggests the substitution of heavy beams made of conventional materials with light but stronger beams made of advanced materials such as composites because of their efficient properties such as high strength to weight proportion, quality and better execution. Further, the potency of composite structures may be optimize...

PurposeThe objective of the present work is to carry out simulation studies for prediction of nonlinear dynamic characteristics of functionally graded uniform beams.Methods The material properties are considered to be varying simultaneously along thickness and length direction. Euler–Bernoulli beam theory is used to generate the constitutive relati...

The current research aims to study the influence of hybridisation on the tensile and fracture surface morphology of plain weave glass fibre/epoxy composites. The polymer resin is primarily filled with inorganic particles such as silicon carbide and alumina, and the corresponding modified resin is termed as effective matrix. This effective matrix is...

Purpose The purpose of this study is to bring down collective information about various issues encountered in modelling of rotor systems. Design/methodology/approach The most important and basic part of “rotor dynamics” is the study related to its different modelling techniques which further involves the analysis of shaft for understanding the sys...

Finite element formulation of damped laminated composite beam considering both Euler-Bernoulli and Timoshenko beam theory is proposed based on Equivalent Modu- lus Theory (EMT) and Direct Procedure Technique (DPT). An operator-based approach is employed to integrate viscoelastic behaviour which results to higher-order model. The vis- coelastic para...

The material damping of rotors causes instability by introducing tangential force to whirl orbit. Literature shows that the improvement of stability range is achieved using fibre-reinforced composites or layered rotors which are light yet strong and exhibit better damping properties. In this study, a multi-layered viscoelastic propeller shaft mount...

The present research focuses on performing the dynamic study of a cracked, internally damped, composite rotating shaft system with journal bearing end supports. A novel mathematical formulation is proposed to introduce a time-varying stiffness matrix for simulating the breathing behaviour of the crack. The random search algorithm is used as one of...

The main purpose of this paper is to perform dynamic analysis of a viscoelastic laminated composite rotor shaft considering various asymmetries. Equivalent modulus theory (EMT) is employed to derive the finite element based mathematical model of the composite shaft considering the shear effect and compared with other method known as direct procedur...

In this article, synthesis and simultaneous optimization of a steering mechanism is proposed for enhancing the cornering performance of a Formula Students competition car. A planar six-bar steering mechanism is synthesized assuming it as two separate slider-crank arrangements with a rigid link between the sliders. Numerical optimization is performe...

The present study focuses on to explore the dynamic analysis of a viscoelastic propeller-shaft system with transverse breathing crack supported by journal bearings. Finite element modelling of the shaft continuum is done considering the Euler-Bernoulli beam theory. Operator based constitutive relationship is applied to incorporate material damping...

A detailed study is conducted to investigate the effect of silicon carbide (SiC) particles on the mechanical behaviour of viscoelastic woven glass/epoxy composite. A novel operator based micromechanical modelling in conjunction with finite element formulation of hybrid composite is derived considering the modulus operator for fibre, matrix as well...

The presence of crack introduces local flexibilities and changes physical characteristics of a structure which in turn alter its dynamic behavior. Crack depth, location, orientation and number of cracks are the main parameters that greatly influence the dynamics. Therefore, it is necessary to understand dynamics of cracked structures. Predominantly...