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Numerical Results

Here, we find the strain of each surface bodies along their lengths. We do this using the local coordinate system of each gauge which is given to us from the elemental triad solution.

<iframe width="600" height="338" src="//www.youtube.com/embed/v2zak9T5lLA?rel=0" frameborder="0" allowfullscreen></iframe>

Summary of steps in the above video:

1. Right click on Solution the tree > Strain > Normal
2. For geometry > select leftmost strain body > Apply
3. For Orientation > x axis (can look at elemental triad system)
4. Change Global System to Solution System
5. Right Click Solution > Evaluate All Results

The

video

mentions

that

you

need

to

pay

attention

to

the

sign

of

the

strain

value

only,

not

the

direction

of

the

coordinate

system.

For

example,

 you should not be concerned,

if

say,

the

x-direction

for

one

of

your

gauge

points

in

the

opposite

direction

of

the

other

two

gauges

in

the

rosette.

This

is

because

the

strain

transformation

is

invariant

when

you

rotate

a

coordinate

direction

by

180

deg.

The

transformation

formula, shown below, has cos(2θ) and sin(2θ). When θ = 180 deg, cos(2θ) and sin(2θ) will be the same as when θ = 0. 

Image Added

For more information on transformations, see this link.

Go to Step 7: Verification & Validation

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