Chapter No.2……Principal planes and stresses……..08 Marks

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Presentation transcript:

Chapter No.2……Principal planes and stresses……..08 Marks

CO RELATED TO CHAPTER C304.2 Calculate the hoop stresses & principal stresses.

Principal planes and stresses Group A: Concept of principal planes and stresses Group B: Thin cylindrical shell

Group A: Concept of principal planes and stresses Simple definition: Principal plane: A plane which carries only normal stress and no shear stress is called… Principal stress: The magnitude of normal stress acting on the principal plane is called… Major Principal Stress: The maximum value of normal stress acting on the principal plane is called… Minor Principal Stress: The minimum value of normal stress acting on the principal plane is called… Major Principal Plane: A plane which carries a major principal stress is called…. Minor principal plane: A plane which carries a minor principal stress is called….

Formulae’s related to Concept of principal planes and stresses

Important note:

Group B:- THIN CYLINDRICAL SHELL…………..4 Marks When ≤ 20, then cylindrical shell is thin , where t= thickness & d= diameter e.g.: tanks, boilers, steam pipes, gas or water pipes Basic definition: Hoop stress or circumferential stress (σc):- The stresses which act in the tangential direction to the circumference of the cylinder are called…….. Longitudinal stress (σL):- The stresses which act parallel to the longitudinal axis of the cylinder are called……..

FORMULAES RELATED TO Thin cylindrical shell