AE114: Wednesday March 11, 2015

Exam 1 Review

Shear Center of an Open SectionThick Skin with no Stringers

Lab Problem 1 Assigned

For a cantilever beam with a channel section, find a) the distribution of the resisting shear flow due to avertical downward force of V = 100 lb

b) the horizontal location of shear center

First, find the shear flows beginning at a and working around to dIxNA of this section has been computed as:

IxNA = 0.2667 in4

To find the shear flow at station m, we integrate from a to m:

There is an easier way to find the integral:

Now we can find the location of the shear center.

First, convert the shear flows (lb/in) into concentrated forces (lb).This is done by finding the area (lb) from the shear flow diagram.

S1

S2

S4

S3

S1

S2

S4

S3

ny

nx

nz

ny

nx

nz