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Mechanics of Materials - Angle of Torsion

  1. Dec 26, 2011 #1

    Femme_physics

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    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Dec 26, 2011 #2

    PhanthomJay

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    Max stress occurs in section CD where the moment is 400 N-m, not in AC where the moment is 200 N-m.

    You also have the wrong value for Io.

    Twist angle at B is the sum of the twist angles of each section.
     
  4. Dec 27, 2011 #3

    Femme_physics

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    Fair enough, I miswrote-- but I got the right answer yes?

    Where? I used the right formula according to wiki, to my understanding my answer is wrong because of this ->

    EDIT: Retried it with what I think is your idea.......
    http://img204.imageshack.us/img204/7044/applying.jpg [Broken]

    Adding the results together does not equate to 1.18 deg
     
    Last edited by a moderator: May 5, 2017
  5. Dec 27, 2011 #4

    PhanthomJay

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    Indeed . Sorry.
    My apologies again, you are correct...I was thinking Ix instead of Io.
    No, but your method is correct. Remember that the result will be in radians. And don't forget the proper use of your plus and minus signs when doing the addition.
     
    Last edited by a moderator: May 5, 2017
  6. Dec 27, 2011 #5

    Redbelly98

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    Moderator's note: thread moved to "Engineering, Comp Sci, & Technology"
     
  7. Dec 28, 2011 #6

    Femme_physics

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    :)

    Ah...now I see.

    Alright, then. I'll give it a crack when I get home today. Thanks!
     
  8. Dec 29, 2011 #7

    Femme_physics

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    Last edited by a moderator: May 5, 2017
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