Application of Elastic Behaviour of Materials

Define Poisson's ratio.

How do you know if a column is structural?
 

What is meant Poisson's ratio What is its unit and significance?
 

For a given metal Young's modulus is $10\times {10}^{10} \mathrm{N} {\mathrm{m}}^{-2}$ and modulus of rigidity is $3.5\times {10}^{10} \mathrm{N} {\mathrm{m}}^{-2}$, then calculate the Bulk modulus of the metal.

Which of the following is true for poison's ratio $\left(\mu \right)$ in terms of Young's modulus$\left(Y\right)$, Bulk Modulus $\left(K\right)$ and modulus of rigidity $\left(G\right)$?

Which of the following relations are true for elastic constants(Young's modulus $\left(E\right)$, modulus of rigidity $\left(G\right)$ and bulk modulus $\left(K\right)$)?

Which of the following relation between elastic constants is true?

Derive the relation between elastic constants.

Define the causes that are responsible for bending in beams.

What is buckling?

Give any two applications of elastic behaviour of materials and explain them.

Why the maximum height on earth is $~10 \mathrm{km}$? $($The elastic limit for a typical rock is $3\times {10}^8 \mathrm{N} {\mathrm{m}}^{-2}$ and the density is about $3\times {10}^3 \mathrm{kg} {\mathrm{m}}^{-3}$.$)$

Why $\mathrm{I}-$shaped steel girders are used for the construction of bridges?

The material commonly used for crane hooks is_____.

The expression for the sag produced in a beam when it is loaded at the center is given by

What is the difference between bending and buckling of a beam?

Why I-shape is preferred for the beams that are used in the construction of bridges? 

Define buckling in beams.

What shape is preferred for the beams that are used in construction of bridges? Why?

What do you understand by buckling in beams?