A strain gauge with a 5 mm gauge length gives a displacement reading of 1.25 um. Calculate the stress value given by this displacement if the material is structural steel.

Question

asked Dec 21, 2020 133k views

1 Answer

Randika · Answer 1 · 2020-12-27T02:05:41+0000

Answer:

stress = 50MPa

Step-by-step explanation:

given data:

Length of strain guage is 5mm

displacement
$\delta = 1.25 \mu m =(1.25)/(1000) =  0.00125 mm$

stress due to displacement in structural steel can be determined by using following relation

E =(stress)/(strain)

stress = E * strain

where E is young's modulus of elasticity

E for steel is 200 GPa

stress = 200* 10^3 *(1.25*10^(-3))/(5)

stress = 50MPa