06: Encircle all right answers (Four correct answers) I. Plane stress occurs whe

Question

06: Encircle all right answers (Four correct answers) I. Plane stress occurs when stresses on one surface are zero I Principal stresses are maximum stresses on a certain plane, on which shear stress are Principal stresses are maximum stresses on a certain plane, on which shear stress are maximunm The maximum shear stresses are found to be on surfaces that are ± 90° from the principal plane directions IV. shear stresses are found to be on surfaces that are ± 45° from the principal plane directions l bending of beams, the normal stresses are minimum at outer surfaces In normal bending of beams, the shear stresses are maximum at neutral surfaces VI. In normal VII.

Explanation / Answer

Q6 :- Answer

I. Right

II. Right

III. Wrong...because principal stresses are maximum on which shear stress are zero

IV. Wrong...Shear stresses are at 45o from principal plane directions

V. Right

VI. Wrong...normal stresses are maximum at outer surfaces

VII. Right

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