Beams Flashcards
1
Q
What does the are under a shear force graph tell you
A
The change in bending moment (M) between two points
2
Q
What does the are under a loading diagram tell you
A
change in shear force (V)
3
Q
How do you find the centroid of a shape
A
- split shape into simpler shapes
xA/A + xA2/A2 + … (same for y)
4
Q
What is the first moment of area
A
Measure of distribution of the area of a shape
(Centroid)
5
Q
What is the second moment of area (moment of inertia)
A
Measure of a shapes ability to resist bending
6
Q
How do you work out the parallel axis theorem
A
I na = ∑ Ic + v^2 A
I na = second moment of area (neutral axis)
Ic = second moment of area (centroid)
v = distance from neutral axis
A = area
