AE3501 Aircraft Structures II Syllabus:
AE3501 Aircraft Structures II Syllabus – Anna University Regulation 2021
COURSE OBJECTIVES:
01. To familiarise the student, the generalized theory of pure bending and work out problems in the calculation of bending stress involving different methods.
02. To gain knowledge in the concept of shear flow in thin-walled sections.
03. To carry out shear flow analysis involving different types of sections.
04. To Impart theoretical knowledge on the behaviour of thin plates and thin-walled columns.
05. To carry out basic stress analysis procedures involving aircraft structural components.
UNIT I UNSYMMETRICAL BENDING OF BEAMS
Unsymmetrical bending of beams – different methods of analysis (neutral axis method, ‘k’ method, and the principal axis method), stresses and deflections in beams under unsymmetricalbending.
UNIT II SHEAR FLOW IN OPEN SECTIONS
Definition and expression for shear flow due to bending, shear flow in thin-walled Open sections with and without stiffening elements, torsion of thin-walled Open sections, the shear center of symmetric and unsymmetrical open sections, structural idealization.
UNIT III SHEAR FLOW IN CLOSED SECTIONS
Shear flow due to bending and torsion in single-cell and multi-cell structures, the shear center of symmetric and unsymmetrical closed sections, effect of structural idealization, shear flow in a tapered beam, stress analysis of thin-webbed beams using Wagner’s theory.
UNIT IV BUCKLING OF PLATES
Behaviour of a rectangular plate under compression, governing equation for plate buckling, buckling analysis of sheets and stiffened panel under compression, concept of the effective sheet width, buckling due to shear and combined loading, crippling.
UNIT V AIRCRAFT STRESS ANALYSIS
Loading and analysis of aircraft wing, fuselage, and tail unit. Use of V-n diagram for sizing the aircraft wing, fuselage, and tail unit.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
Upon completion of the course, Students will be able to
CO1: Analyse and investigate the normal stress variation on unsymmetrical sections ,subjected to bending moments.
CO2: Determine the shear flow variation in thin walled open sections with skin effective andineffective in bending. Also to find out the shear centre of sections.
CO3: Calculate the shear flow variation in single cell and multicell tubes subjected to shearand torque loads
CO4: Investigate the behaviour of buckling of simply supported plates and also to know theeffective width of sheet stringers combination.
CO5: Analyse the shear and bending moment variation of aircraft wing and fuselage and also to know the characteristics of thin webbed beams.
TEXT BOOKS:
1. Bruhn. E.H., ‘Analysis and Design of Flight Vehicles Structures’, Tri-state off-setcompany, USA, 1985.
2. Howard D Curtis, ‘Fundamentals of Aircraft Structural Analysis’, WCB-McGraw Hill,1997.
3. Megson T M G, ‘Aircraft Structures for Engineering Students’, Butterworth-Heinemann;5th edition, 2012.
REFERENCES:
1. Peery, D.J., and Azar, J.J., Aircraft Structures, 2nd edition, McGraw – Hill, N.Y., 1999.
2. Rivello, R.M., Theory and Analysis of Flight Structures, McGraw Hill, 1993.