Strength Of Materials In Me - Study Mode
[#276] When a body is subjected to biaxial stress i.e. direct stresses ($${sigma _{ ext{x}}}$$) and ($${sigma _{ ext{y}}}$$) in two mutually perpendicular planes accompanied by a simple shear stress ($${ au _{{ ext{xy}}}}$$xa0), then maximum shear stress is
Correct Answer
(A) $$frac{1}{2}sqrt {{{left( {{sigma _{ ext{x}}} - {sigma _{ ext{y}}}}
ight)}^2} + 4 au _{{ ext{xy}}}^2} $$
[#277] When a body is subjected to a direct tensile stress ($${sigma _{ ext{x}}}$$) in one plane accompanied by a simple shear stress ($${ au _{{ ext{xy}}}}$$xa0), the maximum shear stress is
Correct Answer
(D) $$frac{1}{2}sqrt {sigma _{ ext{x}}^2 + 4 au _{{ ext{xy}}}^2} $$
[#278] Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 2 : 5, then the ratio of modulus of elasticity of the two materials will be
Correct Answer
(B) 5 : 2
[#279] Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called
Correct Answer
(B) Stress
[#280] Elasticity of Mild Steel specimen is defined by
Correct Answer
(C) Plastic flow