Force Measurements
STRESS

F = the force
A = the area
 
STRAIN

Dl = change in length
l = original length

 

HOOKE'S LAW

 
D l = elongation or change in length
F = force
 
YOUNG'S MODULUS
Stress divided by strain.

         

Y = Youngs modulus
s = stress
e = strain

 

TRANSVERSE STRAIN

POISSON'S RATIO

Transverse strain to axial strain.

m = Poisson's ratio
et = transverse strain (right angle to applied force)
ea = axial strain (in line with applied force
 

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