Anna University , Chennai
Department of B.E-Aeronautical Engg
Fourth Semester
AE2254 Aircraft Structures I
(Regulation 2008)
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Content :
UNIT-1
STATICALLY DETERMINATIC STRUCTURE
Truss
Assumptions
Static determinancy
Reactions at supports
1. Roller or free support
2. Hinged support or fixed support
To determine the reaction
Analysis of truss
1. Analytical method
2. Method of joints
3. Method of section
4. Graphical method
5. Maxwell’s method
6. Culmann’s method
Methods of joints
1. Determination of reaction at the supports
2. Determination of forces in the members of the truss
Composite beam
Tension co-efficient
UNIT-2
COLUMNS
Beam
Tie-rod
Columns
Boundary condition
Assumption
Fixed free column
Fixed-pined column
Equivalent length
Slenderness ratio
Rankine’s formula
Column with initial imperfection
South well plot
Column with eccentric loading
Beam column
Stability of beams under transverse and axial load
To find vertical reaction
UNIT-3
STABILITY INDETERMINE STRUCTURE
Fixed-fixed beam
Bending moments
Bending moments calculation
Procedure to find the bending moments diagram for fixed-fixed beam
Propped cantilever
Clapeyron’s three moment equation
Moment distribution method
Stiffness
To determine the stiffness for simply supported beam
Distribution factor
UNIT-4
FAILURE THEORY
Principle stress
Main theories of failure
1. Rankine’s theory
2. Columbs theory
3. St. venent’s theory
4. Haigh’s theory
5. Von mises theory
Graphical representation of theory of failure
Maximum principal stress theory
Maximum shear stress theory
Maximum principle strain theory
Maximum strain energy theory
Maximum shear strain energy theory
UNIT-5
ENERGY METHODS
Strain energy
Resilience or strain energy density
Proof resilience
Modulus of toughness
Strain energy due to axial loading
Strain energy due to bending
Strain energy due to torsional load
Castigliano’s first theorem
Overhanging beams
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