Answer:
stress = 50MPa
Explanation:
given data:
Length of strain guage is 5mm
displacement[tex] \delta = 1.25 \mu m =\frac{1.25}{1000} = 0.00125 mm[/tex]
stress due to displacement in structural steel can be determined by using following relation
[tex]E =\frac{stress}{strain}[/tex]
[tex]stress = E \times strain[/tex]
where E is young's modulus of elasticity
E for steel is 200 GPa
[tex]stress = 200\times 10^3 *\frac{1.25*10^{-3}}{5}[/tex]
stress = 50MPa
