A bar made of a metal alloy has the dimensions shown in Figure. If an axial force of P=10xb kN is applied to the bar, determine the change in its length and the change in the dimensions of its cross section after applying the load. The material behaves elastically. (E = 210 GPa; v= 0.32) P 10xbkN 10xa mm 0,3ха m P 10xbkN 20xa mm

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Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.