Any engineering student using "Mechanics of Materials - Ferdinand Beer & Russel Johnston" ??

I am having a BIG problem with problem 6.33, Shearing Stresses in Beams.

"two 20x100mm and two 20x180mm boards are glued to form a 120x200mm box beam. Vertical shear V = 3.5Kn is applied. Determine average shearing stress on the two glue joints. (there are a total of 4 glued joints, but 2 are identical).

the only thing really killing me is how to determine the "Q" for each case.

Anyone done this problem ?



Or maybe a link to a webpage with solved problems for this book ?? he he he.. I know it is outthere.. but I cannot find it... that would help a LOT

 

Ahhhh, Beer and Johnston, I have that book on my shelf right above me, 2nd edition.....good times.....

 

I haven't had any good times with it yet.... It is killing me.. that's what is doing.

 

I used that book I think about 5 years ago, I don't know if it was the same edition. I will see if I have the answer at my house later tonight. I may or may not.

Good luck either way.

What type of engineer are you studying to be?
I took that class on the way to being an Aerospace Engineer.

 

Hey, I am taking this course as well, and we just started trusses. I will be doing homework later on today, and I will see what I can do.