Strength of Mat...

The principal stresses at a point in a stressed material are σ₁ = 200 N/mm², σ₂ = 150 N/mm², and σ₃ = 200 N/mm².

Which of the following statements can be true about the shape of the elastic curve during the deflection of the beam?

Find the maximum bending stress (in MPa) induced on an aluminium wire with E = 70 GPa and diameter equal to 1 mm when wound on a drum of diameter 1 m.

Elastic stress of a mild steel specimen in the tensile test is found to be 250 N/mm² and neck formation takes place at 800 N/mm². Elastic strain measured by strain gauge is 0.12%. Modulus of elasticity of mild steel is (GPa) ______.

A welded steel cylindrical drum made of a 10 mm thick plate has an internal diameter of 1.20 m. Find the change in diameter that would be caused by internal pressure of 1.5 MPa. Assume that Poisson's ratio is 0.30 and E = 200 GPa (longitudinal stress, σ_y = pD/4t circumferential stress, σ_x = pD/2t). 

A steel rod of 50 mm diameter is 4m long. In a test, a pull of 80 kN is suddenly applied to it. Take E = 200 GPa. Elongation due to suddenly applied load is _____mm.

A steel ball of diameter 7 mm is used in the Brinell Hardness test to find the BHN of a specimen. If at a load of 240 kg the indentation diameter was found to be 3 mm, then calculate the BHN of the specimen.