1- In designing structures and machines, it is important to
consider strength of material so that the material should have
an adequate strength to resist applied loads or forces and
retain its original shape. Strength of a material is its ability to
withstand this applied load without failure or plastic deformation.
A bar of cross-sectional area 314 mm2 elongates by 0.8
mm over a length of 600 mm when subjected to a
tensile force of 12000 N. Find
the Young’s modulus of elasticity of the material
of the bar.
2- In designing structures and machines, it is important to
consider strength of material so that the material should have
an adequate strength to resist applied loads or forces and
retain its original shape. Strength of a material is its ability to
withstand this applied load without failure or plastic deformation.
A circular pipe of internal diameter 30 mm and thickness 4 mm is
subjected to a force 30 kN and the elongation was measured as 1 mm.
If the length of the pipe is 2 m, find the value of Young's modulus
of elasticity and the stress in the pipe.