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You are here: Home / Mechanics of Solids 2 / Definition of Principal stresses | Principal plane | Principal Axis

Definition of Principal stresses | Principal plane | Principal Axis

March 3, 2012 by admin 4 Comments

  • Principal stresses :

Principal stresses may be defined as

” The extreme values of the normal stresses possible in the material.”

These are the maximum normal stress and the minimum normal stress. Maximum normal stress is called major principal stress while minimum normal stress is called minor principal stress.

  • Principal plane :

Principal plane may be defined as

” The plane on which normal stress attains its maximum and minimum value.”

So these planes are also called as major principal plane and minor principal plane. The shear stress on principal plane is zero.

  • Principal Axis :

Principal axis may be defined as

” The axis where moment of inertia is maximum or minimum and product of inertia is zero.”

Note :

  • Principal plane is the property of stress whereas principal axis is the property of moment of inertia. There is no relation between principal axis and principal plane.

Filed Under: Mechanics of Solids 2

Reader Interactions

Comments

  1. sachin says

    February 16, 2013 at 4:16 pm

    detailed definition of principal stress

    Reply
  2. uday says

    December 4, 2014 at 8:48 am

    But definition is not same with rgpv mp

    Reply
  3. naqash malik says

    February 21, 2015 at 11:46 pm

    good definition

    Reply
  4. Aniket Shrivastav says

    November 3, 2016 at 12:24 pm

    Perfect Definition..

    Reply

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