# Homework Help: Shearing strain

1. Oct 14, 2016

1. The problem statement, all variables and given/known data
In the notes , refer to the circled part . It 's stated that the shearing strain is positive when the angle formed by two surfaces oriented along positive y and x axes decreases ..

2. Relevant equations

3. The attempt at a solution
. As we can see from the figure( paralleogram ) , one of the angle increases , while another angle decreases , am i right ? Why the author said angle decreases ?

2. Oct 14, 2016

Here it is

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• ###### IMG_20161015_102808.jpg
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3. Oct 15, 2016

is the notes wrong
?

4. Oct 15, 2016

### Tom.G

I think that could be stated more clearly. Obviously there are two surfaces oriented along each axis. To match the description to the diagram, try rewording it to:

"...angle formed by two surfaces closest to the origin and oriented along positive y and x axes decreases .."

5. Oct 16, 2016

what do you mean by it ? Can you explain further ?

6. Oct 16, 2016

### Tom.G

7. Oct 17, 2016