एक विकृत सामग्री (strained material) के तत्व पर दो परस्पर लंबवत दिशाओं में 50 MPa और 100 MPa के तन्य प्रतिबल (tensile stresses) कार्य कर रहे हैं (कोई कर्तन प्रतिबल नहीं है)। मुख्य प्रमुख प्रतिबल (major principal stress) कितना है?

A beam in pure bending is subjected to equal and opposite couples and no shear force. Which type of shear stress is zero?

The ratio of the maximum and minimum normal stresses is equal to _________ in the case of pure shear.

The ratio of plastic moment 'MP' of a member to the yield strength 'σy' of its material is called ____.