JAWAHARLAL NEHRU  TECHNOLOGICAL  UNIVERSITY  HYDERABAD
III Year B.Tech. AE - I Sem      L   T/P/D   C
4   -/-/-   4
(A52109) AEROSPACE VEHICLE STRUCTURES - II

UNIT-I

Thin Plate Theory, Structural Instability:  Analysis of thin rectangular plates subject to bending, twisting, distributed transveres load, combined bending and in-plane loading-thin plates having small initial curvature,energy methods ofanalysis.
Buckling of thin plates-elastic, inelastic, experimental determination of critical load for a flat plate,local instability, Tension field beams- complete diagonal tension, incomplete diagonal tension.

UNIT-II

Bending, Shear and Torsion of Thin Walled Beams: Unsymmetrical bending-resolution of bending moments, direct stress distribution,position of neutral axis.Deflections due to bending-approximations for thin walled sections,temperature effects.
Shear loaded thin Walled beams-general sterss, strain and displacement relationships, direct stress, shear centre, twist and warping.
Torsion of beams of closed section-displacements associated with BredtBatho shear flow. Torsion of open section beams.warping of cross section conditions for zero wraping. Bending, shear, torsion of combined open and closed section beams.

UNIT-III

Structural ldealisation of Thin Walled Beams: Structural idealization-principal assumptions, idealization of panel, effect on the analysis of thin Walled beams Under bending, shear, torsion loading-application to determining deflection.

UNIT-IV

Structural and Loading Discontinuities in Thin Walled Beams: Closed section beams-shear stress distribution of a closed section beam built in at one end under bending,shear and torsion loads.open section beams-I Section beam Subjected to torsion, torsion of beam of arbitrary section, torsion bending constant, distributed torque loading-extension of theory for general systems of loading.shear lag-effect of shearing strains in beams-redistributed of bending stresses due to restraining of Warping, limitation of elementary bending theory, effect of accounting for shear lag on the estimated strength. 

UNIT-V

Stress Analysis of Aircraft Components- Wing, Fuselage: Wing spars and box beams-tapered wing spar, open and closed section beams, beams having variable Stringer areas.Wings-Three-boom shell in bending, torsion, shear, tapered wings, deflections, cut-outs in wings.

Bending, shear, trosion, cut-outs in fuselages, fuselage farmes and wing ribs-principles of stiffener/ web construction, fuselage farmes,wing ribs.

TEXT BOOKS

1. Megson, T. M. G., Aircraft Structures for Engineering Students,fourth edn., Elsevier, 2007, ISBN 0-750-667397. 
2. Peery, D. J. and Azar,J.J., Aircraft structures, second edn., MCGra-Hill,1982, ISBN 0-07-049196-8.

REFERENCES

1. Allen,D.H. and Haisler,W.E.,introduction to Aerospace structural Analysis,john Wiley,2010.
2. Bruhn.E.H, Analysis and Design of Flight Vechicles structures,Tir-state off-set company,USA,1965.
3. Lakshmi Narasaiah.G, Aircraft Stractures, BS Publications, 2010.
4. Sechler.E.E. and Dunn, L.G., Aiplane Structural Analysis and Design, John Wiley & Sons.