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Aerospace Materials And Processes

Properties of materials: strength, hardness, fatigue, and creep – Ferrous alloys: stainless steels, maraging steel, aging treatments – Aluminum alloys: alloy designation and tempers, Al-Cu alloys, principles of age hardening, hardening mechanisms, Al-Li alloys, Al-Mg alloys, nanocrystalline alu- minum alloys – Titanium alloys: α-β alloys, superplasticity, structural titanium alloys, intermetallics– Magnesium alloys: Mg-Al and Mg-Al-Zn alloys – Superalloys: processing and properties of super- alloys, single-crystal superalloys, environmental degradation and protective coatings – Composites:

Stochastic Mechanics And Structural Reliability

Basics of probability theory: axioms, definitions, random variable – probability structure of random variable – joint distributions – functions of random variables – some common random variables – random processes/random fields.

Structural reliability – fundamental concepts – first order reliability methods – second order reliability methods – probabilistic sensitivity – system reliability – simulation techniques – high dimensional model representation techniques for reliability analysis.

Fracture Mechanics And Fatigue

Linear elastic fracture mechanics; energy release rate, stress intensity factor (SIF), relation between SIF and energy release rate, anelastic deformation at the crack tip – J-integral, CTOD, test meth- ods for fracture toughness – crack growth and fracture mechanisms, mixed-mode fracture, fracture at nanoscale – numerical methods for analysing fracture, applications – fatigue and design against fatigue failure – prediction of fatigue life.

 

Molecular Dynamics And Materials Failure

Introduction – materials deformation and fracture phenomena – strength of materials: flaws, defects, and a perfect material, brittle vs. ductile material behavior, the need for atomistic simulations – ap- plications basic atomistic modeling – classical molecular dynamics – interatomic potential-numerical implementation – visualisation – atomistic elasticity, the virial stress and strain – multiscale model- ing and simulation methods – deformation and dynamical failure of brittle and ductile materials – applications.

 

Advanced Finite Element Method

Finite element formulations for beam, plate, shell (Kirchhoff and Mindlin-Reissner), and solid ele- ments – large deformation nonlinearity – nonlinear bending of beams and plates – stress and strain measures – total Lagrangian and updated Lagrangian formulations – material nonlinearity – ideal and strain hardening plasticity – elastoplastic analysis – boundary nonlinearity – general contact formulations – solution procedures for nonlinear analysis, Newton-Raphson iteration method.

 

Energy Methods in Structural Mechanics

The variational principle and the derivation of the governing equations of static and dynamic systems – different energy methods: Rayleigh-Ritz, Galerkin etc. – applications: problems of stress analysis, determination of deflection in determinate and indeterminate structures, stability and vibrations of beams, columns and plates of constant and varying cross-sectional area.

 

Multi- Rigid Body Dynamics

Review of planar motion of rigid bodies and Newton-Euler equations of motion; constraints – holo- nomic and non-holonomic constraints, Newton-Euler equations for planar inter connected rigid bod- ies; D’Alembert’s principle, generalized coordinates; alternative formulations of analytical mechanics and applications to planar dynamics – Euler-Lagrange equations, Hamilton’s equations and ignorable coordinates, Gibbs-Appel and Kane’s equations; numerical solution of differential and differential al- gebraic equations; spatial motion of a rigid body – Euler angles, rotation matrices, quaternions

Continuum Mechanics

Review of tensor algebra – tensor analysis – concept of continuum – kinematics of a deformable body – deformation and strain – motion and flow – analysis of stress-stress tensors – conservation laws, mass and momentum conservation – continuum thermodynamics – first and second laws applied to a continuum – Clausius-Duhem inequality – constitutive relations – applications.

 

Aeroelasticity

Introduction to static and dynamic aeroelastic phenomena – divergence, control efficiency and control reversal – two dimensional analysis – divergence of unswept wings – effect of sweep on divergence and control reversal – two-dimensional (airfoil) flutter analysis with quasi-steady and unsteady aero- dynamic loads – introduction to buffeting, stall flutter, galloping and vortex-induced oscillations problems.

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