Materials for Aerospace Structures
Design of Aerospace Structures requires a full understanding of
available materials in order to intelligently evaluate and select the
best materials for the design requirements.
The materials used in various parts of the
Structural Element Design
In order to select the sizes of structural elements, it is first
necessary to calculate the stresses induced from applied loads.
Normal stress is induced by bending moments and axial forces
Shear stress is induced by torsional
Power = torque * angular velocity, paying respect to proper
units recall that revolutions is a unit, whereas
radians is really just a space saver, it disappears when
multiplied by something else
Indicated work the work that is
Capacitors and Inductors
here, F stands for Farads
p dt = C v dv
W(t) | = |
Where H stands for Henrie
p dt = Ld
W(t) | = |
Capacitors in Parallel:
Air-standard, Const. V Cycle (Otto) see next slide
Air-standard, Const. P Cycle (Diesel) see next slide
Air-Standard, Const. P Cycle
Air-Standard, Const. V Cycle
6-1: constant pressure intake
1-2: isentropic compression
What are the requirements for a CI engine
Two-stroke cycle operation
Pros/cons of the two-stroke cycle
Engine geometry bore, stroke,
connecting rod length, crank offset, piston
position, crank angle
What are the following terms? aBDC, rc, WOT
What are the following components and where are the located in
the engine in relation to other components?
Crankshaft, wrist pin, main bearing
FA, AF ratios
Fuel conversion efficiency
What are the main emissions from a SI engine?
What are the main emissions from a CI engine?
What would you expect the main emiss
Brief history of engines
What are the following terms?
Todays Objectives 01-12-2015
Describe the four-stroke cycle for both compression
and spark ignition engines
Explain key opera
Example 1. Calculate the weight of 6A1 -4V Titanium relative to 2024-T3 Aluminum in
Tension, Bending, and Buckling.
The properties for 6Al-4V Titanium are as follows:
Density = 0.16 Ib/in3
Modulus ofElasticity = 16 x 106
Ultimate Stress = 150 ksi
Example Problem 1
Find the maximum normal stress and the shear stress distribution
over the cross section of the beam shown below.
Air/1.x", WM 51.17 Lx/tLL. 6‘36: mm: ('3') FIK‘EVB 5"“3
r-' 3 t '2 7 4
. ,. - :2
,3}: 1,-’r(27AL)+ 35*}-3 ‘al Fr (
which be resisted a 32 in long
circular ot 2A24-f3
= 39x 10:'psi'
withE=10.5 106 ando.,
A useful structure will require that fibers be oriented in more
than one direction. A common approach to creating such a
structure is by stacking layers, or plies, to form a laminate.
Ply orientations are defined using the angle (1-2 a
Flight Vehicle Imposed Loads
All loading conditions imposed on a structure must be known before the
flight vehicle structure can be designed. The load conditions are those
encountered both in flight and on the ground.
Since it is impossible to investigate
W h e nl a n d i n g n a c a r r i e ra 1 0 , 0 0 0b a i r p l a n i s g i v e na d e c e l e r a t i o n 3 9
by meansof an anestinghookas shownin the flgurebelow.
( a ) F j n dt h e t e n s i o nn t h e c a b l e t h e
MAE 598/426 Design of Aerospace Structures
Loading Conditions & Procedures
Metallic & Composite Aerospace Materials
Procedures for Sizing Aerospace Structures
- Design of Structural Members in Bending & Torsion
- Buckling Design of St
Todays Objectives 01-07-2015
Welcome to ME 475 Advanced Topics in
Thermodynamics and Heat Transfer: Internal
Describe the components of internal combustion
engines using the proper terminology
Describe the four-stroke cycle for both co