14:650:458 Aerospace Structures - Spring 2016 - HW 3
Problems 1 and 2 involve plane stress
Problem 1/4
At a point in an elastic material there are two mutually perpendicular planes, one of which carries a direct
tensile stress at 50 N/mm2 and a shear stre

The Four Questions for a Structural
Analyst
What is the load path?
How does the load changes as the environment, working
conditions change?
How do the structural members carry the load?
Tension, compression, bending, shear torsion
How do the load bearin

Introducing the 787
- Effect on Major Investigations
- And Interesting Tidbits
Tom Dodt
Chief Engineer Air Safety Investigation
ISASI September, 2011
COPYRIGHT 2010 THE BOEING COMPANY
Smith, 7-April-2011, ESASI-Lisbon | 1
787 Size Comparison
767-400
~Pax

Spar, span
- the spar runs spanwise, to control spanwise bending and take
transverse shear loads
AB = wing span
spar is often the main structural member of the wing
Main spar of a de Havilland DH.60 Moth
Spar, span
- the spar runs spanwise, to control spa

Bending force distribution = distribution of force in vertical z-direction
= force/unit length
Spar, span
- the spar runs spanwise, to control spanwise bending and take
transverse shear loads
AB = wing span
spar is often the main structural member of the

14:650:458 Aerospace Structures - Spring 2016 - HW 2
Problem 1/4
The slab is cut as shown.
a) Find the traction vector acting on the small (left) section. Give x- and y-components.
b) Then find the normal stress acting on the surface AB, and the shear str